WO2010012222A1 - 肽硼酸及其酯类化合物、制备方法及其用途 - Google Patents

肽硼酸及其酯类化合物、制备方法及其用途 Download PDF

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WO2010012222A1
WO2010012222A1 PCT/CN2009/072967 CN2009072967W WO2010012222A1 WO 2010012222 A1 WO2010012222 A1 WO 2010012222A1 CN 2009072967 W CN2009072967 W CN 2009072967W WO 2010012222 A1 WO2010012222 A1 WO 2010012222A1
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acid
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French (fr)
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朱永强
赵欣
朱新荣
胡杨
吴刚
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江苏先声药物研究有限公司
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00Compounds containing elements of Groups 3 or 13 of the Periodic System
    • C07F5/02Boron compounds
    • C07F5/025Boronic and borinic acid compounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00Antineoplastic agents

Definitions

  • the invention belongs to the field of drug synthesis, and particularly relates to a preparation method of a novel peptide boric acid and an ester compound thereof and the application thereof in pharmacodynamics. Background technique
  • the number of benign tumor patients in China is about 1.2 million, and the total number of cancer patients is about 2.685 million.
  • the annual mortality rate of cancer patients in China is about 119.54 deaths per 100,000 people in the country. That is to say, the number of cancer deaths in the country is about 1.54 million per year, and the urban death rate is slightly higher than that in rural areas. mortality rate.
  • cancer treatment has made great progress, it has not yet been able to fundamentally treat cancer.
  • the anti-cancer drugs currently on the market have certain curative effects, they are mostly cytotoxic drugs with serious side effects. Therefore, how to develop targeted new anticancer drugs from effective tumor targets has become a top priority.
  • the degradation pathway of ubiquitin-proteasome plays a very important role in the regulation of many physiological processes and the development of many important human diseases. For example, if this process excessively degrades the tumor suppressor P 53 and the cyclin-dependent kinase inhibitor ⁇ 27 ⁇ 1 , it causes tumorigenesis and leads to uncontrolled proliferation of human cancer cells. At the same time, this process has also played a key role in immune surveillance, muscle atrophy, regulation of metabolic processes, acquisition of long-term memory, and regulation of circadian rhythms. Recently, this process has also been found in neurodegenerative diseases, Amyotrophic Lateral Sclerosis (ALS), Alzheimer's disease (AD), and Parkinson' disease (PD). Huntington's disease (HD), cortical striatum-Creutzfeld-Jacob disease (CJD), and the onset of diabetes have a large impact.
  • ALS Amyotrophic Lateral Sclerosis
  • AD Alzheimer's disease
  • PD Parkinson' disease
  • CDJD cortical
  • proteasome plays a very important catalytic role.
  • Proteasome is ATP dependent
  • the protease hydrolysis complex is the main enzyme system for decomposing endogenous proteins in eukaryotic cells and belongs to the family of threonine proteases.
  • the largest proteasome component is the largest and most complex protein ever discovered, accounting for approximately 1-2% of all gene products.
  • the proteasome density gradient centrifugal sedimentation coefficient is 26S, so it is also called 26S proteasome. It consists of catalytic particles (CP) and regulatory particles (RP).
  • the sedimentation coefficient of CP is 20S, so it is also called 20S proteasome, molecular weight 700 ⁇ 750kD, CP consists of multiple catalytic subunits with molecular weight of 20 ⁇ 30kD; RP has triploid ATPase subunit (RP triple ATPase, Rpt) and non-ATPase subunit (RP non- ATPase) , RPn), molecular weight between 30 ⁇ 110kD.
  • the 26S proteasome is a cylindrical symmetrical structure with two "caps"-like 19S proteasomes at the ends and two "bucket”-like 20S proteasomes in the middle. Although this proteasome is generally referred to as the 26S proteasome and was originally considered to have a molecular weight of 1000 kD or 1500 kD, more precise measurements in recent years have shown a sedimentation coefficient of 30 s and a molecular weight of 2000 kD. Baumeister et al. used digital mirror analysis coupled with electron microscopy to show that the complexes extracted from amphibians, mammals, higher plants and yeast have a fairly consistent structure.
  • X-rays showed that the 20S proteasome of the archaeal heat source T. acidophilur was cylindrical, with a length of 148 people, a maximum diameter of 113 A, and a minimum diameter of 75 A. It consisted of four rings with a total of 28 subunits. According to the (0C1-0C7, ⁇ 1- ⁇ 7) ⁇ method, they are stacked in an orderly manner and are expressed as 7 symmetry. The center is the channel that runs through the entire particle. There are three large cavities inside the particle, and the larger cavity in the middle is the place where the protein is hydrolyzed.
  • the entrance to the chamber is located in the center of each ring, which is narrow enough to control the entry of proteins on the one hand and the partially hydrolyzed substrate from the active site on the other hand.
  • X-ray confirmed that the 20S proteasome and yeast of mammalian cattle have the same sequence of subunits, and the primary structural characteristics are similar to those of yeast, which is highly conserved.
  • the high-grade structure of the 20S proteasome of cattle is different from that of yeast.
  • subunits such as oc2, ⁇ 1, ⁇ 5, ⁇ 6 and ⁇ 7 are different.
  • the ⁇ 7 subunit has the activity of a terminal nucleophilic hydrolase, and the cleft of this active site is smaller than that of the ⁇ 1, ⁇ 2 and ⁇ 5 subunits.
  • the eukaryotic 20S proteasome contains six active sites, three on each beta loop, located on the ⁇ 1, ⁇ 2 and ⁇ 5 subunits, respectively.
  • the 20S proteasome has been found to have three distinct enzymatic activities: 1.
  • chymotrypsin-like (CT-L) activity hydrolyzing peptide bonds after large hydrophobic amino acid residues, the active site is mainly located on the ⁇ 5 subunit 2
  • trypsin-like (TL) activity hydrolyze peptide bonds after basic amino acid residues, the active site is mainly located in the ⁇ 2 subunit; 3 polypeptide-glutamyl-peptide hydrolase activity (postglutamyl-hydrolase) , PGPH), hydrolyzes the peptide bond after the acidic amino acid residue, and the active site is mainly located in the ⁇ subunit.
  • TL trypsin-like
  • PGPH polypeptide-glutamyl-peptide hydrolase activity
  • Caspase-like activity (Caspase is an intracellular lysine-degrading enzyme that acts on the cell's metabolic apoptotic pathway and acts only on aspartate residues). It should be noted that these names only express their similarities with traditional proteolytic enzymes and are not to be construed as the same catalytic or physiological function.
  • the proteasome shows two other activities: one is to preferentially hydrolyze the peptide bond activity (BrAAP activity) after the amino acid residue with the branched side chain; the other is small
  • studies using methods such as X-ray diffraction, kinetics, and site-directed mutagenesis have shown that new sites with these two activities do not exist.
  • the decomposition of branched chain amino acids such as leucine, isoleucine and valine
  • the chymotrypsin-like site is slightly weak. Therefore, the names of the proteasome active sites do not reflect all of their properties.
  • Covalent bond inhibitors include peptide aldehydes, ⁇ -ketoamides, peptide boronic acids and esters thereof, peptide vinyl sulfones, natural products TMC-95-AD, ⁇ -lactone compounds, epoxy ketone compounds, and the like;
  • Non-covalent bond inhibitors include tea polyphenols and 2-substituted aminobenzyl statines.
  • PS-341 dipeptide boronic acid Bortezomib
  • the drug is a new anti-tumor drug developed by Millennium Pharmaceuticals.
  • An object of the present invention is to provide a novel boric acid and borate compound having a novel structure and having a function of inhibiting proteasome.
  • a 20S proteasome inhibitor they can block tumor cell proliferation and induce tumor cell apoptosis, which can be used for the treatment and prevention of various diseases such as malignant tumors in humans and animals.
  • Another object of the present invention is to provide a process for producing the above-described peptide boronic acid and an ester compound thereof.
  • Still another object of the present invention is to provide an application of the above-described peptide boronic acid and an ester compound thereof for the preparation of an antitumor drug.
  • the object of the present invention can be specifically achieved by the following measures:
  • Each is independently substituted or unsubstituted decyl, benzyl, naphthylmethyl or fluorenylmethyl, most preferably substituted or unsubstituted decyl, benzyl, 1-naphthyl
  • the group, 2-naphthylmethyl or fluorenylmethyl, R 2 is most preferably a substituted or unsubstituted fluorenyl or benzyl group of Cl 10 .
  • R 2 or R 2 does not mean narrowly the sulfhydryl group of Cl 10 , but extends to all such groups, ie substituted or unsubstituted C 3 -6 cyclodecyl or hetero a fluorenyl group, a substituted or unsubstituted benzyl group, a substituted or unsubstituted naphthylmethyl group, a substituted or unsubstituted fluorenylmethyl group, etc., wherein the substituent is a fluorenyl group, a cyano group, a hydroxy group of Cl 1-4 A mercapto group, an amino group or a halogen, preferably a fluorenyl group or a halogen of Cl 4 .
  • 3 ⁇ 4 or ⁇ 2 are each independently hydroxy, Cl ⁇ 10 the embankment group, Cl ⁇ 10 the embankment or aryloxy group, or B, 3 ⁇ 4, and ⁇ 2 - is formed from N, S or a heterocyclic group containing 0 3 ⁇ 4 or ⁇ 2 is preferably independently a hydroxyl group, a decyl group of Cl ⁇ 10, a decyloxy group or an aryloxy group of Cl ⁇ 10, or B, 3 ⁇ 4 and ⁇ 2 together to form a boric acid-a-decanediol ester.
  • 3 ⁇ 4 or Z 2 is most preferably independently a hydroxyl group, or B, 3 ⁇ 4 and ⁇ 2 together form a boronic acid-a-decanediol ester.
  • Pg is a substituted or unsubstituted bicyclic acyl or tricyclic acyl group containing at least one unsaturated ring, preferably a substituted or unsubstituted tetrahydronaphthoyl group, wherein the substituent is a fluorenyl group of Cl 4 , a decyloxy group of Cl ⁇ 4, a halogen or a halogenated fluorenyl group of Cl ⁇ 4. Further, Pg is preferably:
  • R 3 or R 4 are each independently hydrogen, methyl, ethyl, methoxy, ethoxy, fluoro, chloro, bromo or trifluoromethyl.
  • mercapto is used to mean a saturated hydrocarbon group
  • fluorenyl group of Cl ⁇ 10 means a saturated hydrocarbon group having 1 to 10 carbon atoms
  • fluorenyl group of Cl ⁇ 4 means a saturated hydrocarbon group having 1 to 10 carbon atoms.
  • cycloalkyl refers to a non-aromatic carbocyclic group, including a cyclized fluorenyl group.
  • Cyclodecyl groups may include bicyclic or polycyclic systems System. Examples of the cyclodecyl group include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a cyclodecyl group of C3 to 6 means a cyclodecyl group having 1 to 10 carbon atoms.
  • benzyl refers to benzyl, and substituted benzyl means that at least one hydrogen atom on the phenyl ring of the benzyl group is substituted by a non-hydrogen moiety, and the substituent of the benzyl group may be halogen, -CN, -OH, - SH, -NH 2 , a linear or branched fluorenyl group of 1 to 6 carbons, a substituted linear or branched fluorenyl group of 1 to 6 carbons.
  • heterocyclic fluorenyl refers to a non-aromatic heterocarbocyclyl group including a cyclized fluorenyl group in which one or more ring-forming carbon atoms are replaced by a hetero atom such as a 0, N or S atom.
  • the heterocyclic fluorenyl group preferably has 3, 4, 5, 6 or 7 ring-forming atoms.
  • Metal group means an -O-fluorenyl group having a carbon number of usually 1 to 10.
  • Examples of the decyloxy group include methoxyethoxy group, propoxy group (e.g., n -propoxy group and isopropoxy group), t-butoxy group and the like.
  • Aryl means an aromatic carbocyclic group including monocyclic or polycyclic aromatic hydrocarbons such as phenyl, naphthyl, anthracenyl, phenanthryl and the like.
  • aryloxy group means a -0-aryl group, and the concept of the aryl group is as described above, and the most preferable example of the aryloxy group is a phenoxy group.
  • Halogen includes fluorine, chlorine, bromine and iodine.
  • the compounds of the present invention can be used to prepare antitumor drugs, and the overall preparation route is as follows:
  • the preparation method of the compound (II) includes the following steps:
  • a compound of the formula (II-3) can be produced by the following two routes: a. A compound of the formula (II-2) is condensed with Pg in the presence of a peptide condensing agent to form a formula (II-3). a compound; b, Pg reacts with SOCl 2 to form an acid chloride, and then reacts with a compound of the formula (II-2) to form a compound of the formula (II-3).
  • a compound of the formula (II-3) is subjected to saponification under basic conditions to form a sodium salt thereof, and then a compound (11) is produced under acidic conditions.
  • the peptide condensing agent commonly used in the above reaction is hydrazine, fluorene-dicyclohexyl-carbodiimide (abbreviated as DCC), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride. (abbreviated as EDGHC1), 1-hydroxybenzotriazole (abbreviated as HOBt) or isobutyl chloroformate.
  • the preparation method of the compound (III) includes the following steps (taking B, 3 ⁇ 4 and Z 2 together to form boric acid - 0C-nonanediol ester as an example):
  • a compound represented by the formula (III-8) is subjected to removal of a protective group bis(trimethylsilyl) under acidic conditions to give an amino group-exposed borate compound represented by the formula (III).
  • R1 is as defined above
  • R 5 is a linear, branched or substituted anthracene of 1 to 4 carbon atoms
  • X represents a halogen such as F, Cl, Br, I
  • M represents an alkali metal such as Li, Na, K, etc.
  • compounds (II) and (III) are reacted in the presence of a certain condensing agent to form (1).
  • the condensing agent used is TBTU (0-benzotriazole-oxime, oxime, ⁇ ', ⁇ ,-tetramethyluronium tetrafluoroborate), 1-(3-dimethylaminopropyl)-3-ethyl Carbodiimide hydrochloride (abbreviated as EDOHCl), 1-hydroxybenzotriazole (abbreviated as HOBt) or isobutyl chloroformate.
  • the ester group can be removed to form boric acid by the following reaction: pg,
  • ester groups There are two methods for removing ester groups: First, under the action of sodium periodate, the diol is broken to form the sodium salt of boric acid, and the pH of the system is adjusted to be acidic to obtain boric acid. Second, the boric acid ester and space Boric acid with a higher steric hindrance (such as isobutylboronic acid, phenylboronic acid) is transesterified to obtain the desired product boric acid, and the product is obtained by some separation means.
  • a higher steric hindrance such as isobutylboronic acid, phenylboronic acid
  • the inventors of the present invention have confirmed by experiments that the compounds of the present invention have good proteasome-inhibiting activity and anti-tumor activity, and all of the compounds exhibit better proteasome inhibitory activity and antitumor activity at a nanomolar level, and have broad Value.
  • the preparation method of the compound designed by the invention has high yield and simple process, and is suitable for industrial production. ⁇
  • the amino acid methyl ester oxime-2 prepared in the amino protecting agent Pg and 1 was dissolved in THF, and N-methylmorpholine and a suitable peptide condensation reaction reagent (DCC + HOBt) were added at 0 °C. Slowly warm to room temperature and continue to react for a certain period of time until TLC shows the reaction is complete. The insoluble solid was removed by filtration, the filtrate was evaporated to dryness, and an appropriate amount of ethyl acetate was added to dissolve the obtained viscous liquid, and the organic phase was washed with alkali (5% sodium hydrogencarbonate), pickled (10% citric acid), and alkali-washed ( Wash with 5% sodium bicarbonate) and saturated brine.
  • alkali 5% sodium hydrogencarbonate
  • pickled 10% citric acid
  • alkali-washed Wash with 5% sodium bicarbonate
  • the desiccant was dried (anhydrous sodium sulfate and anhydrous magnesium sulfate). The desiccant was filtered off, and the solvent was evaporated to dryness under reduced pressure to give the crude product of amino-protected amino acid methyl ester. The crude product was used in the next step without saponification.
  • the amino protecting agent Pg was dissolved in SOC1 2 at 0 ° C, and a catalytic amount of dry DMF was added thereto, and the mixture was reacted at room temperature for 20 minutes, and heated to 50 ° C for a certain period of time to evaporate unreacted SOCl 2 .
  • the acid chloride of the protective agent Pg is obtained. Dissolve in an appropriate amount of dry toluene, dry and set aside.
  • the amino acid methyl ester II-2 was dissolved in an organic solvent (toluene), an excess of N-methylmorpholine was added, and a toluene solution of the Pg acid chloride prepared above was added dropwise at 0 °C.
  • the reaction was carried out at 0 ° C for a certain period of time, and then slowly raised to room temperature for a certain period of time until TLC showed completion of the reaction.
  • the solvent was distilled off under reduced pressure, and the obtained solid was dissolved with an organic solvent (ethyl acetate), respectively, and washed with alkali (5% sodium hydrogen carbonate), acid (10% citric acid), and alkali (5% sodium hydrogencarbonate) Wash with saturated saline.
  • the desiccant was dried (anhydrous sodium sulfate and anhydrous magnesium sulfate). The desiccant was filtered off, and the solvent was evaporated under reduced pressure to give a crude product of amino-protected amino acid methyl ester. The crude product was used directly in the next step of saponification without purification.
  • the crude product of the above prepared II-3 was dissolved in an organic solvent (acetone), and an aqueous solution of an inorganic base (2N NaOH) was added at 0 ° C to maintain the pH of the system between 11 and 13, until TLC showed The reaction is complete.
  • the organic solvent was distilled off under reduced pressure, and the aqueous phase was extracted twice with an organic solvent (ethyl acetate), and aqueous aqueous solution (5N HCl) was added dropwise at 0 ° C until the pH of the system was between 1 and 3.
  • the organic layer was extracted with an organic solvent (ethyl acetate) and the organic phase was dried (dry sodium sulfate and anhydrous magnesium sulfate).
  • the desiccant was filtered off, and the solvent was evaporated under reduced pressure to give the product II.
  • III-3 ln . 5 III-6a
  • III-2a ⁇ 3 ⁇ 2 ⁇ 20 is dissolved in water, and III-la, tert-butanol, a small amount of pyridine and a catalytic amount of osmium tetroxide are added to the reaction system. The mixture was heated to reflux for 24 hours at a certain temperature (10 CTC), and the reaction was completed by TLC. Naturally, it was cooled to room temperature, and an appropriate amount of reducing agent (NaHS0 3 ) and solid salt were added. The liquid layer was separated, and the aqueous layer was extracted with an organic solvent (diethyl ether), and the organic phase was combined, and the organic phase was dried (dry sodium sulfate and anhydrous magnesium sulfate). The desiccant was filtered off, and the solvent was evaporated under reduced pressure to give a viscous liquid. The product III-2a was isolated by column chromatography.
  • Magnesium chips, an anhydrous organic solvent (anhydrous THF or anhydrous ether) and a small iodine tablet were placed in a strictly dried reaction flask.
  • a mixed solution of a halogenated hydrocarbon R 2 X and an anhydrous organic solvent (anhydrous THF or anhydrous diethyl ether) was added dropwise to the reaction mixture at room temperature.
  • the reaction system was heated to a slightly boiling state with a water bath. After most of the magnesium reaction was completed, the refluxing system was heated for 30 minutes to completely react the remaining magnesium. The reaction system was slowly cooled and set aside.
  • III-6a is dissolved in an anhydrous organic solvent (anhydrous THF or diethyl ether), and the reaction system is cooled to a temperature of 78 °C.
  • anhydrous organic solvent anhydrous THF or diethyl ether
  • the reaction system was naturally warmed to room temperature, and stirring was continued for 18 h at room temperature. The solid was removed by filtration, and concentrated to give the compound III-7a.
  • ⁇ 3 ⁇ 2 ⁇ 20 is dissolved in water, and III-lb, tert-butanol, a small amount of pyridine, and a catalytic amount of osmium tetroxide are added to the reaction system.
  • the mixture was heated under reflux at a certain temperature (10 CTC) for 48 hours, and the reaction was completed by TLC. Naturally, it was cooled to room temperature, and an appropriate amount of reducing agent (NaHS0 3 ) and solid salt were added.
  • the organic solvent was distilled off under reduced pressure, and the organic solvent (diethyl ether and ethyl acetate) was added to the mixture of the mixture of the liquid and the solid, and the aqueous layer was extracted with an organic solvent (diethyl ether and ethyl acetate). It is dried with a drying agent (anhydrous sodium sulfate and anhydrous magnesium sulfate). The desiccant was filtered off, and the solvent was evaporated under reduced pressure to give a viscous liquid.
  • the product III-2b was obtained by distillation under reduced pressure at a high vacuum.
  • Magnesium chips, an anhydrous organic solvent (anhydrous THF or anhydrous ether) and a small iodine tablet were placed in a strictly dried reaction flask.
  • a mixed solution of a halogenated hydrocarbon R 2 X and an anhydrous organic solvent (anhydrous THF or anhydrous diethyl ether) was added dropwise to the reaction mixture at room temperature.
  • the reaction system was heated with a water bath. The solution was brought to a slightly boiling state. After most of the magnesium reaction was completed, the system was heated to reflux for 30 minutes to completely react the remaining magnesium. The reaction system was slowly cooled and set aside.
  • III-6b is dissolved in an anhydrous organic solvent (anhydrous THF or diethyl ether), and the reaction system is cooled to a temperature of 78 °C.
  • anhydrous organic solvent anhydrous THF or diethyl ether
  • the reaction system was naturally warmed to room temperature, and stirring was continued for 24 h at room temperature. The solid was removed by filtration, and concentrated to give the compound III-7b.
  • Dissolve II and III in an organic solvent such as THF, CH 2 C1 2
  • an organic solvent such as THF, CH 2 C1 2
  • N-methylmorpholine and a condensing agent TBTU or EDGHC1 + HOBt or isobutyl chloroformate
  • the organic phase is dried with a drying agent (anhydrous sodium sulfate and anhydrous magnesium sulfate).
  • a drying agent anhydrous sodium sulfate and anhydrous magnesium sulfate.
  • the desiccant was filtered off, and the solvent was evaporated under reduced pressure to give a glassy solid compound boronic acid I.
  • the boronic acid ester I prepared in 1 is dissolved in an organic solvent such as diethyl ether and CH 2 C 1 2 , and water and phenylboronic acid are added. After stirring the reaction for 4 hours at room temperature, TLC showed the reaction was completed. The organic phase was extracted 3 times with water, the aqueous phases were combined and evaporated to dryness. The resulting viscous solid was washed with a small amount of diethyl ether to give a solid compound of boronic acid IV.
  • an organic solvent such as diethyl ether and CH 2 C 1 2
  • the boric acid ester I prepared in 1 was dissolved in an organic solvent (acetone or methanol), and then an aqueous solution of ammonium acetate and NaI0 4 were added . After stirring at room temperature for 24 hours, TLC showed the reaction was completed.
  • the organic solvent is distilled off under reduced pressure, the aqueous phase is adjusted to pH 3 with a mineral acid (hydrochloric acid), extracted with an organic solvent (ethyl acetate or CH 2 C1 2 ), and the organic phase is combined, and the organic phase is dried with a drying agent (anhydrous sulfuric acid) Sodium and anhydrous magnesium sulfate).
  • the desiccant was filtered off, and the solvent was evaporated to dryness under reduced pressure to give the crude compound boric acid IV.
  • the preparation of the compounds of the invention is described below by the synthesis of specific compounds:
  • the 1-na structure is;
  • the 3-Indol structure is The stereo configuration may be a racemate (m) of G), (r) or both;
  • Type can be (s), (r) or both races; ⁇ -naTH knot
  • the hydrochloride of the other amino acid methyl ester used in the present invention can be produced by the above procedure, the compound lb: synthesized by the method of synthesizing the compound la using L-leucine; and the compound lc: by the method of synthesizing the compound la using ⁇ -( Synthesis of ⁇ -1-naphthyl)alanine; Compound Id: synthesized by the method of synthesizing compound la using L-(P-2-naphthyl)alanine; Compound le: L-oxime according to the method of synthesizing compound la Acid synthesis; Compound If: synthesized by the method of synthesizing compound la using L-tryptophan; Compound lg : synthesized by the method of synthesizing compound la using L-isoleucine.
  • the specific compounds synthesized and their properties are shown in the following table.
  • Method b acid chloride method To 0 (1), S0C1 2 (3.8 ml, 52 mmol) was added to 1-(S)-1,2,3,4-tetrahydronaphthoic acid (0.92 g, 5.2 mmol), followed by a catalytic amount of dry DMF. . The mixture was slowly warmed to room temperature, reacted for 20 minutes, and further heated to 50 ° C for 1 hour to stop the reaction. Unreacted S0C1 2 was distilled off. 1-(S)-1,2,3,4-tetrahydronaphthoyl chloride was obtained. This was dissolved in 10 ml of dry toluene and was used.
  • the compound la (1.12 g, 5.2 mmol) was dissolved in 20 mL of THF, and N-methylmorpholine (NMM) (0.7 mL, 6.2 mmol) was added, and the 1-(S) prepared above was added dropwise at 0 °C. a toluene solution of -1,2,3,4-tetrahydronaphthoyl chloride. The reaction was carried out at 0 ° C for 2 hours, and then slowly raised to room temperature for 1 hour, and TLC showed the reaction was completed.
  • NMM N-methylmorpholine
  • the solvent was evaporated under reduced pressure, and the obtained solid was dissolved in 30 ml of ethyl acetate, and washed with 5% sodium hydrogen carbonate (30mL), 10% citric acid (30mL), 5% sodium hydrogencarbonate (30mL) and saturated brine (2 X 20mL).
  • the organic phase was dried over anhydrous Na 2 SO 4 .
  • the desiccating agent was filtered off, and the solvent was evaporated to dryness to dryness to give a white solid.
  • the product was used in the next step without saponification.
  • Example (3) Other amino protected amino acids used in the present invention can be prepared by the methods described in Example (3).
  • Trimethyl borate (7.5 mL, 66 mmol) was added to a solution of the above-prepared compound III-3a at 110 ° C, and stirring was continued for 1 hour, and then 12 mL of 5N HCl solution was added, and the temperature was naturally raised to room temperature.
  • the reaction mixture was transferred to a sep. funnel, and the organic layer was evaporated. The solvent was evaporated to give a white solid, 9.3 g, yield 99.4%. The product was used in the next step without purification.
  • a crushed magnesium strip (1.45 g, 60 mmol)
  • 70 mL of anhydrous tetrahydrofuran was added, and a small amount of iodine was added thereto.
  • 30 ml of a solution of tert-butyl bromide (8.22 g, 60 mmol) in tetrahydrofuran was added dropwise at room temperature. After heating, the mixture was slightly boiled until the magnesium strip was dissolved, and the solution was cooled to a tetrahydrofuran solution of a t-butyl format reagent. Dry and set aside.
  • Dichloromethylborate -0C-decanediol ester III-6a ( 15.78 g, 60 mmol) was dissolved in 100 mL of anhydrous tetrahydrofuran. Pass dry nitrogen, and cool to a temperature of 78 ° C, then slowly add the above prepared t-butyl format reagent four After the dropwise addition, the dried ZnCl 2 powder (4.09 g, 30 mmol was naturally warmed to room temperature, and the mixture was stirred at room temperature. After TLC detection, the reaction was completed after 18 h. The solid was removed by filtration, and concentrated by column chromatography.
  • Dichloromethylene borate-OC-decanediol ester III-6a ( 1.58 g, 6 mmol) was dissolved in 20 mL of diethyl ether and stirred at room temperature. Nitrogen gas was introduced, and the temperature was lowered to a temperature of 78 ° C, and then a diethyl ether solution of the prepared n-butyl format reagent was slowly added dropwise. After the dropwise addition was completed, dried ZnCl 2 powder (0.41 g, 3 mmol) was added. Raise to room temperature naturally and continue stirring at room temperature. After TLC detection, the reaction was completed after 18 hours.
  • Dichloromethylene borate-0C-decanediol ester III-6a ( 1.31 g, 5 mmol) was dissolved in 20 mL of diethyl ether and stirred at room temperature. Nitrogen gas was introduced, and the temperature was lowered to a temperature of 78 ° C, and then a solution of the prepared benzyl chloride format reagent in diethyl ether was slowly added dropwise. After the dropwise addition was completed, dried ZnCl 2 powder (0.41 g, 3 mmol) was added. Raise to room temperature naturally and continue stirring at room temperature. After TLC detection, the reaction was completed after 24 hours.
  • Dichloromethylene borate-0C-decanediol ester III-6a (4.52 g, 20 mmol) was dissolved in 30 mL of diethyl ether and stirred at room temperature. Nitrogen gas was introduced, and the temperature was lowered to 78 ° C, and then a solution of the prepared methylbenzyl chloride format reagent in diethyl ether was slowly added dropwise. After the dropwise addition was completed, dried ZnCl 2 powder (0.55 g, 4 mmol) was added. Raise to room temperature naturally and continue stirring at room temperature. After TLC detection, the reaction was completed after 24 hours.
  • Dichloromethylene borate-OC-decanediol ester III-6a (2.66 g, 10 mmol) was dissolved in 20 mL of diethyl ether and stirred at room temperature. Nitrogen gas was introduced, and the temperature was lowered to a temperature of 78 ° C, and then a solution of the prepared fluorobenzyl bromide format reagent in diethyl ether was slowly added dropwise. After the dropwise addition was completed, dry ZnCl 2 powder (0.27 g, 2 mmol) was added. Raise to room temperature naturally and continue stirring at room temperature. After TLC detection, the reaction was completed after 24 hours.
  • the filtrate was cooled to a temperature of 78 ° C, and 34.5 mL of a diethyl ether solution of a concentration of 1.3 M hydrogen chloride was added, and then naturally warmed to room temperature, and a large amount of milky white solid appeared. Freezing allows the solid to completely precipitate. Filtration and diethyl ether washing afforded 3.86 g of a white solid.
  • LiN(SiMe 3 ) 2 (10 mL, 10 mmol) was added to a 100 mL single-mouth bottle, nitrogen gas was passed through, and the temperature was lowered to 78 ° C, and then 1-phenyl-2-chloro-ethylboronic acid was slowly added by a syringe. 10 mL of a solution of 0C-nonanediol ester III-9a ( 3.19 g, 10 mmol) in THF was added, and after the dropwise addition, the mixture was allowed to warm to room temperature and then stirred at room temperature. After TLC detection, the reaction was completed after 24 hours.
  • Dichloromethylborate -0C-decanediol ester III-6b ( 1.18 g, 4.49 mmol) was dissolved in 12 mL of diethyl ether and stirred at room temperature. Nitrogen gas was introduced, and the temperature was lowered to 78 ° C. Then, a solution of the prepared tert-butyl format reagent in diethyl ether (6 mL, 4.50 mmol) was slowly added dropwise. After the dropwise addition, dry ZnCl 2 powder (0.44 g) was added. , 3.25mmol). Raise to room temperature naturally and continue stirring at room temperature. After TLC detection, the reaction was completed after 18 hours.
  • LiN(SiMe 3 ) 2 (5 mL, 5 mmol) was added to a 100 mL single-mouth bottle, nitrogen gas was passed through, and the temperature was lowered to 78 ° C, and then slowly added with a syringe containing 2-methyl-4-chloro-butylboronic acid - 10 mL of a solution of 0C-nonanediol ester III-7b ( 1.42 g, 5 mmol) in THF was added, and after the dropwise addition, the mixture was allowed to warm to room temperature and then stirred at room temperature. After TLC detection, the reaction was completed after 20 hours.
  • the solvent was distilled off under reduced pressure, dissolved in 20 mL of hexanes and filtered to remove insolubles.
  • the filtrate was cooled to a temperature of 78 ° C, and 12 mL of a solution of 1.3 M hydrogen chloride in diethyl ether was added, and then naturally warmed to room temperature, and a large amount of milky white solid appeared.
  • the solid was completely precipitated by freezing, filtered, and the product was washed with diethyl ether to give 1.12 g of a white solid.
  • N-1-(S)-1,2,3,4-tetrahydronaphthoyl-L-phenylalanine (s-3aA) (0.12 g, 0.37 mmol) in Example 1 under nitrogen atmosphere Dissolved in 10 ml of dry THF, the system was cooled to -5 °C, HOBt (0.06 g, 0.44 mmol) was added, and after reacting for 20 minutes, the system was cooled to -15 ° C, and EDC.HCl (0.37 mmol) was added.
  • the method of synthesizing other similar compounds of the present invention can employ the above method.
  • Nl-(-l,2,3,4-tetrahydronaphthoyl-L-phenylpropanamide-D-leucine boronic acid-oc-decanediol ester (0.1 g, 0.175 mmol) with 5 mL of acetone Dissolve, add NH 4 OAC solution (0.1 N, 4 mL), and finally add NaIO 4 (0.11 g, 0.525 mmol), and stir the reaction at room temperature. TLC detection showed that the reaction was complete after 10 h. Add NaOH to the reaction solution. Solution (2N, 3mL), CH 2 C1 2 extraction. The pH of the solution was adjusted to about 3 with concentrated hydrochloric acid.
  • the method utilizes the fluorescent substrate polypeptide Suc-Leu-Leu-Val-Tyr-AMC (abbreviated as Suc-LLVY-AMC, Sue represents succinyl group, AMC represents 7-amide-4-methylcoumarin) under the action of proteasome Hydrolysis will occur, releasing the principle of fluorescent AMC (Ex: 380nm, Em: 460nm).
  • Suc-LLVY-AMC the fluorescent substrate polypeptide Suc-Leu-Leu-Val-Tyr-AMC
  • Sue represents succinyl group
  • AMC represents 7-amide-4-methylcoumarin
  • the proteasome used in this experiment was the human erythrocyte 20S proteasome, and the enzyme, fluorescent substrate and test buffer were purchased from Biomol.
  • the experimental system is 100 ul, which contains the proteasome 90 ⁇ l (0.2 g), the substrate 10 ⁇ l, the final concentration is 50 ⁇ , the drug (inhibitor) 0.1 ⁇ 1, and the final concentration is 10-? ⁇ ! ⁇ 11 ⁇ ! ,
  • the actual configuration concentration is 10 - 4 ⁇ ⁇ 10 - 8 ⁇ .
  • the specific experimental process is as follows:
  • the drug was accurately weighed and dissolved in DMSO to 10 - 2 Torr. Pipette 90 lDMSO ⁇ was added to give 10- 3 M, and then added 90 lDMSO suction ⁇ 10- 4 M obtained from 10- 3 M concentration of the drug in the same manner to obtain 10- 5 M, 10- 6 M, 10 - 7 M, 10- 8 M concentration of the drug.
  • the 20S proteasome (1 ⁇ ⁇ / ⁇ 1) was diluted to a concentration of 0.0022 ⁇ ⁇ / ⁇ 1 in a buffer solution, 90 ⁇ 1 was added to each well of a 96-well fluorescent plate, and then ⁇ . ⁇ sample was added to each well.
  • the listed drug Wanxi was used as a positive control drug, and 0.1 l DMSO was added to the blank control group and the background control group, and the reaction was carried out at 37 ° C for 20 min.
  • a ⁇ fluorescent substrate was added to each well, and the reaction was carried out at 37 ° C for 1 hour in the dark, and the fluorescence value was measured by a 380 nm / 460 nm fluorescent microplate reader (Tecan, Infinite M200).
  • the therapeutic dose of the compound of the present invention may vary depending, for example, on the particular use of the treatment, the mode of administration of the compound, the health of the patient, and the judgment of the prescribing physician.
  • the proportion or concentration of a compound of the invention in a pharmaceutical composition will vary depending on a number of factors, including dosage, chemical properties (e.g., hydrophobicity), and route of administration.
  • the compounds of the invention may be provided for parenteral administration in an aqueous physiological buffer containing from about 0.1 to about 10% w/v of the compound. Some typical dosage ranges range from about 1 ⁇ g/kg to about lg/kg body weight per day.
  • the dosage ranges from about 0.01 mg/kg body weight to about 100 mg/kg body weight per day.
  • the dose is highly likely to depend on such variables as the type and progression of the disease or disorder, the overall health of the particular patient, the relative biological efficacy of the selected compound, the formulation of the excipient, and the route of administration. Effective doses can be derived from dose response curves from in vitro or animal model test systems.

Description

肽硼酸及其酯类化合物、 制备方法及其用途
技术领域
本发明属于药物合成领域,具体涉及一类新型肽硼酸及其酯类化合物的制备方法及其 在药效学上的应用。 背景技术
目前, 恶性肿瘤仍然是威胁人们生命的主要疾病之一。 美国癌症协会在 2007 年 12 月 17 日的 《全球癌症事实和数据》 中报告, 2007年全球新增癌症病患 1200万例, 760 万人死于癌症, 相当于每天死亡 2万人。 其中发达国家新增癌症患者 670万人, 有 470 万人死于癌症;发展中国家当年新增癌症患者 540万人, 290万人因癌症死亡。而在中国, 据卫生部统计资料表明,我国恶性肿瘤全国患病率达到 1.15%。,如果按照目前全国总人口 13亿为基数, 目前我国恶性肿瘤每年新增患者约有 148.5万左右, 另外良性肿瘤全国患 病率达到 0.93%。, 按照全国总人口 13亿为基数, 目前我国良性肿瘤患者新增约有 120万 左右, 两者合计每年新增约有 268.5万左右的肿瘤患者。 从肿瘤死亡率看, 每年我国肿瘤 患者的死亡率全国合计约每 10万人有 119.54人死于肿瘤病因, 也就是说全国肿瘤死亡人 数每年约有 154万人左右,城市死亡率略高于农村死亡率。癌症的治疗目前虽然已经取得 了很大的进步,但还未能从根本上治疗癌症的目的。 目前上市的抗癌药物虽然具有一定的 疗效, 但它们大多是细胞毒药物, 具有严重的毒副作用。 因此, 如何从有效的肿瘤靶点出 发来研究靶向性的新型抗癌药物成为当务之急。
目前已经证实,泛素一蛋白酶体这一降解途径对很多生理过程的调控以及人类许多重 要疾病的发展过程都起到非常重要的作用。例如,如果这一过程过度地降解肿瘤抑制因子 P53和依赖周期素的激酶的抑制剂 ρ27Ώρ1,就会引起肿瘤的发生以及导致人的癌细胞的失 控繁殖。 同时, 这一过程在免疫监督、 肌肉萎缩、 代谢过程的调控、 长期记忆的获得以及 生理节奏的调控等方面也起到了非常关键的作用。近期发现,这一过程还对神经退行性疾 病、 肌萎缩侧索硬化症 (Amyotrophic Lateral Sclerosis, ALS)、 阿尔茨海默病 (Alzheimer' disease, AD)、 帕金森病 (Parkinson' disease, PD) 、 亨廷顿舞蹈病 (Huntington' disease, HD) 、 皮质一纹状体一脊髓变性病 (Creutzfeld-Jacob disease, CJD) 以及糖尿病的发病 都有很大的影响。
在这个关键途径中, 蛋白酶体起到了非常重要的催化作用。 蛋白酶体是依赖 ATP的 蛋白酶水解复合物,是真核细胞中分解内源性蛋白质的主要酶系统,属于苏氨酸蛋白酶家 族。 蛋白酶体组分最多, 是迄今为止所发现的最大、 最复杂的蛋白质, 大约占全部基因产 物的 1一 2 %。 蛋白酶体密度梯度离心沉降系数为 26S, 故又被称为 26S蛋白酶体, 它由 催化颗粒(catalytic particle, CP)和调控颗粒(regulatory particle, RP) 组成, CP的沉降 系数为 20S, 所以又称 20S蛋白酶体, 分子量 700〜750kD, CP由分子量为 20〜30kD的 多个催化亚基组成; RP有三倍体 ATP酶亚基( RP triple ATPase, Rpt)和非 ATP酶亚基 (RP non- ATPase, RPn) , 分子量在 30~110kD之间。
26S蛋白酶体是一个圆柱状的对称结构, 两端为两个"瓶盖"状的 19S蛋白酶体, 中 间则为两个 "水桶"状的 20S蛋白酶体。 虽然一般把这种蛋白酶体叫做 26S蛋白酶体, 而且最初认为它的分子量是 1000kD或者 1500kD, 但是, 近年来更精确的测定表明, 它 的沉降系数为 30S, 分子量为 2000kD。 Baumeister等人运用电镜耦合的数字影像分析表 明, 从两栖动物、哺乳动物、 高等植物和酵母菌里提取出来的这种复合物具有相当一致的 结构。
X射线表明, 古细菌热源体属嗜酸菌 T. acidophilur 的 20S蛋白酶体呈圆柱形状, 长 148人, 最大直径是 113 A, 最小直径是 75 A, 它由四个圆环共 28个亚基按照 (0C1-0C7, β1-β7)^ 方式有序堆叠而成, 呈 )7对称。 中央为贯穿整个颗粒的孔道, 颗粒内部有三个 大的空腔, 中间较大的空腔为蛋白质水解的场所。腔的入口位于各圆环的中心, 这些孔很 窄,一方面能控制蛋白质的进入, 另一方面又能组织部分水解的底物从活性位点释放。近 年来, X射线证实, 哺乳动物牛的 20S蛋白酶体和酵母菌有完全相同的亚基排列顺序, 一级结构特性与酵母菌的类似, 具有高度的保守性。 但是, 牛的 20S 蛋白酶体的高级结 构和酵母菌的是不同的。 其中, oc2、 β1、 β5、 β6 和 β7 等亚基是不相同的。 而且在牛的 20S蛋白酶体中, β7亚基具有 Ν端亲核水解酶的活性, 这个活性部位的裂口比 β1、 β2和 β5亚基的要小。
小分子抑制剂一般只作用于 20S蛋白酶体的催化位点。真核细胞 20S蛋白酶体含有六个 活性位点, 每个 β环上有三个, 分别位于 β1、 β2和 β5亚基上。 已发现 20S蛋白酶体有三种 明显的酶活性: 1、 糜蛋白酶样 (chymotrypsin-like, CT-L) 活性, 在大的疏水性氨基酸残 基后水解肽键, 该活性部位主要位于 β5亚基上; 2、 胰蛋白酶样 (trypsin-like, T-L) 活性, 在碱性氨基酸残基后水解肽键, 活性部位主要位于 β2亚基; 3、 多肽-谷氨酰-多肽水解酶活 性 (postglutamyl-hydrolase , PGPH ) , 在酸性氨基酸残基后水解肽键, 活性部位主要位于 βΐ亚基。不过后来发现这个位点上分解天冬氨酸残基的速度比谷氨酸快, 所以又被称为半 胱天冬酶样 (caspase-like) 活性。 (半胱天冬酶是细胞内赖氨酸分解酶, 在细胞代谢凋亡 途径起作用, 只作用于天冬氨酸残基)。 需要注意的是这些名称只表达了它们与传统的蛋 白水解酶之间的相似之处, 并不能解释为相同的催化机理或生理功能。
如果上述三种活性被抑制后,蛋白酶体则显示出另外两种活性:一种是在带分枝侧链 的氨基酸残基后优先水解肽键的活性 (BrAAP活性);另一种是在小的中性氨基酸残基后水 解肽键的活性 (SNAAP活性)。 然而, 利用 X射线衍射、 动力学和位点定向突变等方法的 研究却表明具有这两种活性的新位点并不存在。 而且, 分解支链氨基酸(如亮氨酸、 异亮 氨酸和缬氨酸)主要由半胱天冬酶位点执行, 糜蛋白酶样位点稍弱。 因此, 蛋白酶体活性 位点的名称并不能反映出它们的全部特性。
目前报道的蛋白酶体抑制剂可以分为两大类: 共价键抑制剂和非共价键抑制剂。 共 价键抑制剂包括肽醛类、 α-酮酰胺类、 肽硼酸及其酯类、 肽乙烯砜类、 天然产物 TMC-95-A-D, β-内酯类化合物、 环氧酮类化合物等; 非共价键抑制剂包括茶多酚类及 2- 取代氨基苄基 statine类等。 在这些抑制剂中, 已有一个二肽硼酸 Bortezomib (PS-341 )上 市。 该药是由它是由美国千年制药公司 (Millennium Pharmaceuticals) 开发的新型抗肿瘤 药物, 2003年 5月 13日获美国 FDA批准, 以商品名 Velcade™ (每支含 bortezomib无菌 粉末 3.5mg, 仅供静脉注射用)在美国上市。 2004年 4月该药又被批准在欧盟上市。 2005 年 9月 21 日, 该药由西安杨森首次在我国的广州上市。 2005年, 该药同时在法国、 比利 时和荷兰获得具有医药界的诺贝尔奖称号的 "PrixGalien"奖。 在 2007年 7月 11 日, 该 药又被美国 FDA批准用于治疗复发或难治性套细胞淋巴瘤(MCL)。它是目前唯一获 FDA 批准用于治疗 MCL的药物。 这一药物的成功上市, 更加证明了蛋白酶体可以作为一个新 型的靶点进行抗肿瘤药物的设计。
^:咖
本发明的目的是提供一种结构新颖的且具有抑制蛋白酶体功能的新型硼酸和硼酸酯 类化合物。 它们作为 20S 蛋白酶体抑制剂, 能阻断肿瘤细胞增殖, 诱发肿瘤细胞凋亡, 从而可用于人和动物的多种疾病如恶性肿瘤的治疗和预防。
本发明的另一目的是提供一种上述肽硼酸及其酯类化合物的制备方法。
本发明还有一个目的是提供一种上述肽硼酸及其酯类化合物在制备抗肿瘤药物方面 的应用。
本发明的目的具体可以通过以下措施来达到:
一种肽硼酸及其酯类化合物, 其结构如式 I所示,
Figure imgf000006_0001
其中 :
1^或 分别独立地为取代或非取代的 Cl〜10的垸基、 C3〜6的环垸基或杂环垸基、 苄基、 萘甲基或吲哚甲基, 1^或1 2优选分别独立地为取代或非取代的 Cl〜10的垸基、 苄基、 萘甲基或吲哚甲基, 最优选为取代或非取代的 Cl〜10的垸基、 苄基、 1-萘甲 基、 2-萘甲基或吲哚甲基, R2最优选为取代或非取代的 Cl〜10的垸基或苄基。 对 或 R2的取代或非取代的限定并非仅狭义地指 Cl〜10的垸基, 而是扩大到所有所述的基团, 即包括取代或非取代的 C3〜6 的环垸基或杂环垸基、 取代或非取代的苄基、 取代或非取 代的萘甲基、 取代或非取代的吲哚甲基等, 其中所述的取代基为 Cl〜4的垸基、 氰基、 羟基、 巯基、 氨基或卤素, 优选为 Cl〜4的垸基或卤素。
¾或∑2分别独立地为羟基、 Cl〜10的垸基、 Cl〜10的垸氧基或芳氧基, 或者 B、 ¾和∑2—起形成含有 N、 S或 0的杂环基团; ¾或∑2优选分别独立地为羟基、 Cl〜10 的垸基、 Cl〜10的垸氧基或芳氧基, 或者 B、 ¾和∑2—起形成硼酸 -a-蒎垸二醇酯; ¾ 或 Z2最优选分别独立地为羟基, 或者 B、 ¾和∑2—起形成硼酸 -a-蒎垸二醇酯。
Pg为取代或非取代的至少含有一个不饱和环的二环酰基或三环酰基基团, 优选为取 代或非取代的四氢萘酰基, 其中所述的取代基为 Cl〜4的垸基、 Cl〜4的垸氧基、 卤素 或 Cl〜4的卤代垸基。 更进一步, Pg优选为:
Figure imgf000006_0002
其中 R3或 R4分别独立地为氢、 甲基、 乙基、 甲氧基、 乙氧基、 氟、 氯、 溴或三氟甲基。
术语 "垸基"用于表示饱和烃基, Cl〜10的垸基是指含有 1〜10个碳原子的饱和烃 基, Cl〜4的垸基是指含有 1〜10个碳原子的饱和烃基。
术语 "环垸基"指非芳族碳环基, 包括环化的垸基。 环垸基可以包括二环或多环系 统。 环垸基的例子包括环丙基, 环丁基, 环戊基, 环己基, 环庚基, C3〜6的环垸基是指 含有 1〜10个碳原子的环垸基。
术语 "苄基"是指苯甲基, 取代的苄基是指在苄基的苯环上至少一个氢原子被非氢 部分取代, 苄基的取代基可以是卤素, -CN, -OH, -SH, -NH2, 1-6个碳的直链或支链垸 基, 1-6个碳的取代的直链或支链垸基。
术语 "杂环垸基"是指非芳族杂碳环基, 包括环化的垸基, 其中一个或多个成环碳 原子被杂原子例如 0, N或 S原子取代。 杂环垸基优选具有 3, 4, 5, 6或 7个成环原子。
" 1-萘甲基"是指
'2-萘甲基"是指
"吲哚甲基"是指
Figure imgf000007_0001
"垸氧基"是指 -0-垸基基团, 其碳原子数一般为 1〜10个。 垸氧基的例子包括甲氧 乙氧基, 丙氧基 (如, n-丙氧基和异丙氧基), t-丁氧基等。
"芳基"是指芳族碳环基, 包括单环或多环芳烃例如苯基, 萘基, 蒽基, 菲基等。
"芳氧基"是指 -0-芳基, 而芳基的概念如上所述, 芳氧基最优选的例子是苯氧基。
"卤素"包括氟, 氯, 溴和碘。
本发明化合物可以用以制备抗肿瘤药物, 其总的制备路线为:
Figure imgf000007_0002
ΙΠ-6 ΙΠ-7 ΙΠ-8 III
Figure imgf000007_0003
I 该反应式中各基团 Pg, Ri, R2, Zi, Z2的定义如前所述, 式 (II-1)在 S0C12作用下 与甲醇反应得到式(11-2),式(II-2)在肽缩合剂下与 Pg缩合生成式(II-3)或者式(II-2) 与酰氯的 Pg 反应生成式 (11-3), 式 (II-3) 皂化再酸化生成 (II); 而另一边, (III-6) 与金属试剂 R2MgX 反应, 再在室温下被无水 ∑!^12催化成式 (111-7), 式 (III-7) 与 MN(SiMe3)2反应生成式(111-8), 式(III-8)在酸性条件下脱保护形成式(III); 最后(II) 和 (III) 缩合成式 (1)。 式 (I) 还可脱除与 B连接的基团从而得到硼酸产物。
以下详述本发明化合物的制备方法:
Ri
Z1)(Z2)
HCI.NH2丫 B KZ ) pg- B(
g- OH +
R2 O R;
III I
Pg, Ri, R2, Zl7 Z2的定义如上所述。
化合物 (II) 的制备方法包括如下的步骤:
1) 式(II-1)结构的氨基酸在 SOCl2作用下与甲醇反应得到式(II-2)结构的化合物;
2) 式 (II-3) 结构的化合物可以通过以下两种途径来制备: a、 式 (II-2) 结构的化 合物在肽缩合剂存在下, 与 Pg发生缩合反应, 生成式 (II-3) 的化合物; b、 Pg 与 SOCl2发生反应生成酰氯,然后再与式(II-2)结构的化合物反应生成式(II-3) 结构的化合物。
3) 式 (II-3) 结构的化合物在碱性条件下发生皂化反应生成其钠盐, 然后在酸性条 件下生成化合物 (11)。
Figure imgf000008_0001
II- II-2 II-3 其中, ?§和1^的定义如上所述。
上述反应中常见的肽缩合剂为 Ν,Ν-二环己基-碳二亚胺(缩写为 DCC), 1- (3-二甲 氨基丙基) -3-乙基碳二亚胺盐酸盐(缩写为 EDGHC1), 1-羟基苯并三氮唑(缩写为 HOBt) 或氯甲酸异丁酯。
化合物 (III) 的制备方法包括如下的步骤 (以 B、 ¾和 Z2—起构成硼酸 -0C-蒎垸二 醇酯为例):
1) 式 (III-1) 所示的 a-蒎烯在氧化剂 0804的作用下生成手性的蒎垸二醇 (III-2); 2) 干燥的 CH2C12在 -110°C下与正丁基锂发生反应, 生成式(III-3)所示的有机金属 中间体;
3) 式(III-3)结构的化合物与式(III-4)所示的硼酸酯在 -11CTC下反应,生成式(III-5) 所示的同源硼酸酯;
4) 式 (III-5) 结构的化合物与式 (III-2) 结构的手性蒎垸二醇进行酯交换, 生成式
(III-6) 所示的硼酸酯;
5) 式 (III-6) 结构的化合物与金属试剂 R2MgX在 -78°C下反应, 然后在室温下被无 水 ZnCl2催化生成式 (III-7) 所示的化合物;
6) 式 (III-7) 结构的化合物与 MN(SiMe3)2反应生成双 (三甲基硅) 保护的胺基硼 酸酯如式 (III-8) 所示的化合物;
7) 式 (III-8)所示的化合物在酸性条件下将保护基双(三甲基硅) 脱除生成氨基裸 露的如式 (III) 所示的硼酸酯类化合物。
Figure imgf000009_0001
Figure imgf000009_0002
其中, Rl的定义同前所述, R5是指 1到 4个碳原子的直链、 支链或取代垸烃, X代表 卤素如 F、 Cl、 Br、 I, M代表碱金属如 Li、 Na、 K等。
- Ί - 最后将化合物 (II ) 和 (III ) 在一定的缩合剂存在下反应生成 (1)。 所用缩合剂为 TBTU ( 0-苯并三氮唑 -Ν, Ν, Ν', Ν,-四甲脲四氟硼酸酯), 1- ( 3-二甲氨基丙基) -3-乙基碳 二亚胺盐酸盐 (缩写为 EDOHCl), 1-羟基苯并三氮唑 (缩写为 HOBt) 或氯甲酸异丁酯。
如果 (I ) 所示的化合物为硼酸酯, 则通过下述反应可以脱去酯基生成硼酸: pg、
Figure imgf000010_0001
I IV
脱除酯基的方法有两种: 一是在高碘酸钠的作用下, 二醇发生断裂, 生成硼酸的钠 盐, 将体系 pH值调为酸性, 得到硼酸; 二是硼酸酯与空间位阻较大的硼酸(如异丁基硼 酸、 苯基硼酸) 发生酯交换得到目的产物硼酸, 经过一些分离手段得到产物。
本发明的发明人通过实验证实,本发明化合物具有良好的抑制蛋白酶体的活性和抗肿 瘤活性, 所有的化合物在纳摩尔水平下表现出较好的蛋白酶体抑制活性和抗肿瘤作用, 具 有广阔的应用价值。 同时, 本发明所设计的化合物制备方法产率较高, 工艺简单, 可适合 于工业化生产。 ^
第一部分 化合物的合成 本发明的化合物的制备可按照如下过程实施:
一、 化合物(II) 的制备
Figure imgf000010_0002
II-l II-2 II-3 II
1、 氨基酸甲酯 II-2的制备:
将不带任何保护基的氨基酸 II-1溶解于无水甲醇中, -5 °C下向反应体系中滴加 SOCl2, 缓慢升至室温后反应 1小时, 再回流 1小时。 蒸除溶剂, 得到的固体经重结晶 (甲醇 /乙 醚) 得到氨基酸甲酯的盐酸盐 (式 11-2)。 2、 氨基保护的氨基酸甲酯 II-3的制备:
方法 a:
将氨基保护剂 Pg和 1中所制备的氨基酸甲酯 Π-2溶于 THF中, 0°C下加入 N-甲基 吗啉及合适的肽缩合反应试剂 (DCC + HOBt)。 缓慢升至室温, 继续反应一定时间, 直 至 TLC显示反应完成。 过滤除去不溶性固体, 蒸干滤液, 向得到的粘稠液体中加入适 量的乙酸乙酯溶解, 有机相分别用碱洗(5%碳酸氢钠), 酸洗(10%柠檬酸), 碱洗(5% 碳酸氢钠) 及饱和食盐水洗。 干燥剂干燥 (无水硫酸钠和无水硫酸镁)。 滤除干燥剂, 减压蒸干溶剂, 得到氨基保护的氨基酸甲酯 Π-3的粗产品。粗产品未经纯化, 直接用于 下步皂化反应。
方法 b:
在 0°C下, 将氨基保护剂 Pg溶解于 S0C12中, 加入催化量的干燥 DMF, 室温下反应 20分钟, 升温到 50°C反应一定时间, 蒸除未反应的 SOCl2。 得到保护剂 Pg的酰氯。 用适 量的干燥甲苯溶解, 干燥放置备用。
将氨基酸甲酯 II-2溶于有机溶剂(甲苯) 中, 加入过量的 N-甲基吗啉, 在 0°C下滴 加上述制备的 Pg的酰氯的甲苯溶液。 在 0°C下反应一定时间, 然后缓慢升至室温反应 一定时间, 直至 TLC显示反应完成。 减压蒸除溶剂, 得到的固体用适量有机溶剂 (乙 酸乙酯) 溶解, 分别用碱洗 (5%碳酸氢钠), 酸洗 (10%柠檬酸), 碱洗 (5%碳酸氢钠) 及饱和食盐水洗。 干燥剂干燥 (无水硫酸钠和无水硫酸镁)。 滤除干燥剂, 减压蒸干溶 剂, 得到氨基保护的氨基酸甲酯 Π-3的粗产品。粗产品未经纯化, 直接用于下步皂化反 应。
3、 化合物 II的制备:
将上述制备好的 II-3的粗产品溶解于有机溶剂 (丙酮) 中, 在 0°C下加入无机碱的 水溶液(2N NaOH) , 使体系 pH值保持在 11~13之间, 直至 TLC显示反应完成。 减压蒸 除有机溶剂, 水相用有机溶剂 (乙酸乙酯)萃取 2遍, 水相在 0°C下滴加无机酸的水溶液 ( 5N HC1)直至体系 pH值为 1~3之间。 用有机溶剂(乙酸乙酯)萃取, 有机相用干燥剂 干燥 (无水硫酸钠和无水硫酸镁)。 滤除干燥剂, 减压蒸干溶剂, 得到产物 II。
二、 化合物(III) 的制备
1、 化合物 III-a的制备:
Figure imgf000012_0001
III-3 ln.5 III-6a
R2MgX
Figure imgf000012_0002
III-7a ni-8a nl-a
•OR5
ΙΠ-4: R50-
OR5
1 ) III-2a的制备: 将 Με3ΝΟ·2Η20溶解于水中, 向反应体系中加入 III-la、 叔丁醇、 少量吡啶及催化 量的四氧化锇。 一定温度下 (10CTC ) 加热回流 24小时, TLC检测反应完毕。 自然降至 室温, 加入适量还原剂 (NaHS03) 及固体食盐。 分液, 水层用有机溶剂 (乙醚) 提取, 合并有机相, 有机相用干燥剂干燥 (无水硫酸钠和无水硫酸镁)。 滤除干燥剂, 减压蒸干 溶剂, 得到粘稠液体。 经柱层析分离得产品 III-2a。
2) 化合物 III-3的制备:
在 -11CTC下, 向惰性气体(如?^或八!"气)保护的无水二氯甲垸和无水四氢呋喃体系 中慢慢滴加正丁基锂溶液, 滴加完毕后保持 -11CTC继续反应 1小时。 得到化合物 III-3的 溶液。 直接用于下步反应。
3) 化合物 III-5的制备:
在 -11CTC下, 向 2) 中制备好的化合物 III-3的反应体系中慢慢滴加式 III-4所示的 硼酸三酯,保持 -11CTC搅拌 1小时后加入无机酸溶液(5N HC1)淬灭反应, 自然升至室温。 分液, 水层用有机溶剂(乙醚)萃取, 合并有机相, 有机相用干燥剂干燥(无水硫酸钠和 无水硫酸镁)。 滤除干燥剂, 减压蒸干溶剂得白色粘稠状固体化合物 111-5。 产品未经纯化 直接用于下步反应。 4) 化合物 III-6a的制备:
将化合物 III-5用有机溶剂 (无水乙醚或二氯甲垸) 溶解, 加入制备好的 III-2a, 室 温搅拌反应 18小时后, TLC显示反应完成。 分液, 水相用有机溶剂 (乙酸乙酯) 提取, 合并有机相, 有机相用干燥剂干燥 (无水硫酸钠和无水硫酸镁)。 滤除干燥剂, 减压蒸干 溶剂, 经柱层析分离得化合物 III-6a。
5 ) 格式试剂 ^¾ 的制备:
在严格干燥过的反应瓶内加入镁屑、 无水有机溶剂 (无水 THF或无水乙醚) 及一小 粒碘片。 室温下向反应体系中滴加卤代烃 R2X和无水有机溶剂 (无水 THF或无水乙醚) 的混合溶液。 用水浴将反应体系加热至微沸状态, 待大部分镁反应完后, 加热回流体系 30分钟, 使剩余的镁全部反应完全。 使反应体系慢慢冷却, 备用。
6) 化合物 III-7a的制备:
在惰性气体(如 N2或 Ar气)保护下,用无水有机溶剂(无水 THF或乙醚)溶解 III-6a, 反应体系降温至一 78°C。向其中慢慢滴加 5 )中制备好的 R2MgX格式试剂的有机溶剂(无 水 THF或乙醚)溶液。 滴加完毕后, 加入干燥好的 ZnCl2粉末。 反应体系自然升至室温, 室温下继续搅拌 18h后 TLC显示反应完成。 过滤除去固体, 浓缩后柱层析分离得化合物 III-7a。
7 ) 化合物 III-8a的制备:
用无水有机溶剂 (无水 THF) 溶解 6) 中制备好的 III-7a, 反应体系用惰性气体 (如 ^或八!"气) 保护并降温至一 78°C, 然后慢慢滴加 MN ( SiMe3 ) 2溶液。 滴加完毕后, 自 然升至室温, 室温下继续搅拌。 TLC检测显示, 20h后反应完毕。 减压蒸除溶剂, 得到粘 稠液体。 加入正己垸溶解, 过滤除去不溶物, 得到 III-8a的正己垸溶液。 备用。
8 ) 化合物 III-a的制备:
将上述制备好的 III-8a的正己垸溶液用惰性气体 (如 N2或 Ar气) 保护并降温至一 78°C。 向反应体系中加入溶解氯化氢气体的有机溶剂(如二氧六环、 乙醚)溶液, 然后自 然升至室温, 析出固体。 过滤, 滤饼用有机溶剂 (乙醚) 洗涤, 得到化合物 III-a。 产品 未经纯化, 直接用于下步反应。 2、 化合物 III-b的制备:
Figure imgf000014_0001
III-lb III-2b
Figure imgf000014_0002
Figure imgf000014_0003
DR5
III-4: R5〇— B
OR5
1 ) III-2b的制备:
将 Με3ΝΟ·2Η20溶解于水中, 向反应体系中加入 III-lb、 叔丁醇、 少量吡啶及催化 量的四氧化锇。 一定温度下 (10CTC ) 加热回流 48小时, TLC检测反应完毕。 自然降至 室温, 加入适量还原剂 (NaHS03) 及固体食盐。 减压蒸馏除去有机溶剂, 向残余的液体 和固体的混合物中加入有机溶剂 (乙醚和乙酸乙酯), 分液, 水层用有机溶剂 (乙醚和乙 酸乙酯) 提取, 合并有机相, 有机相用干燥剂干燥 (无水硫酸钠和无水硫酸镁)。 滤除干 燥剂, 减压蒸干溶剂, 得到粘稠液体。 高真空度下减压蒸馏得产品 III-2b。
2) 化合物 III-3的制备:
在 -11CTC下, 向惰性气体(如 N2或 Ar气)保护的无水二氯甲垸和无水四氢呋喃体系 中慢慢滴加正丁基锂溶液, 滴加完毕后保持 -11CTC继续反应 1小时。 得到化合物 III-3的 溶液。 直接用于下步反应。
3) 化合物 III-5的制备: 在 -110°C下, 向 2) 中制备好的化合物 III-3的反应体系中慢慢滴加式 III-4所示的 硼酸三酯,保持 -11CTC搅拌 1小时后加入无机酸溶液(5N HC1)淬灭反应, 自然升至室温。 分液, 水层用有机溶剂(乙醚)萃取, 合并有机相, 有机相用干燥剂干燥(无水硫酸钠和 无水硫酸镁)。 滤除干燥剂, 减压蒸干溶剂得白色粘稠状固体化合物 111-5。 产品未经纯化 直接用于下步反应。
4) 化合物 III-6b的制备:
将化合物 III-5用有机溶剂 (无水乙醚或二氯甲垸) 溶解, 加入制备好的 III-2b, 室 温搅拌反应 24小时后, TLC显示反应完成。 减压蒸除有机溶剂, 向剩余粘稠液体中加入 有机萃取剂 (乙酸乙酯或乙醚), 分液, 水相用有机溶剂 (乙酸乙酯或乙醚) 提取, 合并 有机相, 有机相用干燥剂干燥(无水硫酸钠和无水硫酸镁)。滤除干燥剂, 减压蒸干溶剂, 经柱层析分离得化合物 III-6b。
5) 格式试剂 ^¾ 的制备:
在严格干燥过的反应瓶内加入镁屑、 无水有机溶剂 (无水 THF或无水乙醚) 及一小 粒碘片。 室温下向反应体系中滴加卤代烃 R2X和无水有机溶剂 (无水 THF或无水乙醚) 的混合溶液。用水浴将反应体系加热。 使溶液呈微沸状态, 待大部分镁反应完后, 加热回 流体系 30分钟, 使剩余的镁全部反应完全。 使反应体系慢慢冷却, 备用。
6) 化合物 III-7b的制备:
在惰性气体(如 N2或 Ar气)保护下,用无水有机溶剂(无水 THF或乙醚)溶解 III-6b, 反应体系降温至一 78°C。向其中慢慢滴加 5)中制备好的 R2MgX格式试剂的有机溶剂(无 水 THF或乙醚)溶液。 滴加完毕后, 加入干燥好的 ZnCl2粉末。 反应体系自然升至室温, 室温下继续搅拌 24h后 TLC显示反应完成。 过滤除去固体, 浓缩后柱层析分离得化合物 III-7b。
7) 化合物 III-8b的制备:
用无水有机溶剂 (无水 THF) 溶解 6) 中制备好的 III-7b, 反应体系用惰性气体 (如 ^或八!"气) 保护并降温至一 78°C, 然后慢慢滴加 MN (SiMe3) 2溶液。 滴加完毕后, 自 然升至室温, 室温下继续搅拌。 TLC检测显示, 24h后反应完毕。 减压蒸除溶剂, 得到的 粘稠液体。 加入大量干燥的石油醚溶解, 过滤除去不溶物, 得到 III-8b 的石油醚溶液, 备用。
8 ) 化合物 III-b的制备:
将上述制备好的 III-8b的石油醚溶液用惰性气体 (如 N2或 Ar气) 保护并降温至一 78°C。 向反应体系中加入溶解氯化氢气体的有机溶剂(如二氧六环、 乙醚)溶液, 然后自 然升至室温, 析出固体。 过滤, 滤饼用干燥的有机溶剂 (乙醚)洗涤, 得到化合物 III-b。 产品未经纯化, 直接用于下步反应。 三、 化合物(I) 的制备
Figure imgf000016_0001
Figure imgf000016_0002
II III b !b
1、 硼酸酯 (I) 的制备:
将 II及 III溶解在有机溶剂 (如 THF、 CH2C12) 中, 冷却到 -5°C, 加入 N-甲基吗啉及 缩合剂 (TBTU或 EDGHC1 + HOBt或氯甲酸异丁酯), 反应 2小时后, 升至室温反应 1 小时。 过滤除去不溶性固体, 减压蒸干溶剂。 得到的固体用有机溶剂 (乙酸乙酯) 溶解, 有机相分别用碱洗(5%碳酸氢钠), 酸洗(0.1N盐酸), 碱洗(5%碳酸氢钠)及饱和食盐 水洗。 有机相用干燥剂干燥 (无水硫酸钠和无水硫酸镁)。 滤除干燥剂, 减压蒸干溶剂得 玻璃状固体化合物硼酸酯 I。
Figure imgf000017_0001
la IVa
Figure imgf000017_0002
方法 a: 酯交换法
用有机溶剂(如乙醚和 CH2C12)溶解 1中制备的硼酸酯 I, 加入水及苯基硼酸。 室温 搅拌反应 4小时后 TLC显示反应完成。有机相用水提取 3遍, 合并水相, 减压蒸发至干。 得到的粘稠固体用少量乙醚洗涤, 得到胶状固体化合物硼酸 IV。
方法 b: 氧化断裂法
用有机溶剂(丙酮或甲醇)溶解 1中制备的硼酸酯 I,然后加入醋酸铵水溶液及 NaI04。 室温下搅拌 24小时后, TLC显示反应完成。 减压蒸除有机溶剂, 水相用无机酸 (盐酸) 调节 pH值为 3, 用有机溶剂 (乙酸乙酯或 CH2C12) 萃取, 合并有机相, 有机相用干燥剂 干燥 (无水硫酸钠和无水硫酸镁)。 滤除干燥剂, 减压蒸干溶剂得泡沫状固体化合物硼酸 IV。 以下以具体化合物的合成来描述本发明的化合物制备过程:
一、 式(II) 中化合物的制备:
Figure imgf000017_0003
RI : a=PhCH2; b=(CH3)2CHCH2; c=l-naCH2; d=2-naCH2; e=(CH3)2CH; f=3-IndolC g=CH3CH2(CH3)CH;
Pg: A=l-THna; B=2-THna; C=l-naTH。 其中, 1-na 结构为 ; 3-Indol 结构为
Figure imgf000017_0004
立体构型可以为 G)、 ( r)或两者的消旋体(m) ;
型可以为 (s)、 (r) 或两者的消旋体; Ι-naTH 结
Figure imgf000018_0001
1、 N-1- S) -1,2,3,4-四氢萘甲酰基 -L-苯丙氨酸(3aA) 的制备
(1) L-苯丙氨酸甲酯盐酸盐(la) 的制备
ΝΗ2■ HCI
在 lOOmL反应瓶中加入 25mL无水甲醇, 冰盐浴冷却到 -10°C以下, 搅拌下缓慢滴加 SOCl2(7mL, 96mmol),然后于 -10°C以下反应 10min,再加入 L-苯丙氨酸( 1.65g, lOmmol) , 低温反应 40 min, 撤去冰盐浴, 于室温反应 48h, 减压浓缩, 再加入 15 mL甲醇, 反复减 压浓缩两次。 加入 50 mL乙醚, 放置, 析出针状结晶, 过滤干燥, 粗产品再用甲醇一乙 醚重结晶, 得白色晶体 L-苯丙氨酸甲酯盐酸盐 2.0g, 收率 95%, [a]D 25 = +37.2° (c= 1, CH3CH2OH), m.p.: 155-158°C。
本发明中所用到的其它氨基酸甲酯的盐酸盐可以采用上述步骤制备, 化合物 lb: 按 合成化合物 la的方法采用 L-亮氨酸合成;化合物 lc:按合成化合物 la的方法采用 ί-(β-1- 萘基)丙氨酸合成; 化合物 Id: 按合成化合物 la的方法采用 L-(P-2-萘基)丙氨酸合成; 化 合物 le: 按合成化合物 la的方法采用 L-缬氨酸合成; 化合物 If: 按合成化合物 la的方 法采用 L-色氨酸合成; 化合物 lg: 按合成化合物 la的方法采用 L-异亮氨酸合成。 合成 的具体化合物及其性质如下表。
Figure imgf000018_0002
Figure imgf000019_0001
(2) N-l- S) -1,2,3,4-四氢萘甲酰基 -L-苯丙氨酸甲酯(s-2aA) 的制备
Figure imgf000019_0002
方法 a: DCC缩合法
将化合物 la (1.12g, 5.2mmol)溶于 20mLTHF中, 用 N-甲基吗啉(NMM) (0.7mL, 6.2mmol) 中和, 于冰浴下冷却备用。 在另一反应瓶中加入 1- (S) -1,2,3,4-四氢萘甲酸 (0.92g, 5.2mmol),用 THF 20mL溶解,冰水浴冷却,于 0°C加入二环己基碳二亚胺(DCC) (1.07g, 5.2mmol), HOBt (0.84g, 6.2mmol), 于 0°C反应 40min, 然后加入已制备并冷 却好的中和完毕的 la的 THF溶液。 TLC检测反应,4h后反应完毕,过滤除去不溶物 N, Ν'- 二环己基脲(DCU), 滤液加入乙酸乙酯 150mL, 分别用 5%NaHC03溶液(30mL)、 10% 的柠檬酸溶液 (30mL)、 5%NaHC03溶液 (30mL) 和饱和食盐水溶液洗涤 (2X20mL)。 乙酸乙酯层用无水 Na2S04干燥, 过滤, 减压蒸除溶剂, 得化合物 1.72g, 产物为白色固 体, 收率 98%。 产品未经纯化, 直接用于下步反应。
方法 b: 酰氯法 在 0°C下, 向 1- ( S ) -1,2,3,4-四氢萘甲酸 ( 0.92g, 5.2mmol) 中加入 S0C12 ( 3.8ml, 52mmol), 然后加入催化量的干燥 DMF。 缓慢升至室温, 反应 20分钟, 再升温到 50°C反 应 1小时, 停止反应。 蒸除未反应的 S0C12。 得到 1- ( S ) -1,2,3,4-四氢萘甲酰氯。 将之溶 解于 10ml干燥的甲苯中, 备用。
将化合物 la( 1.12g, 5.2mmol)溶于 20mL THF中,加入 N-甲基吗啉(NMM) ( 0.7mL, 6.2mmol), 在 0°C下滴加上述制备好的 1- ( S ) -1,2,3,4-四氢萘甲酰氯的甲苯溶液。 在 0 °C下反应 2小时, 然后缓慢升至室温反应 1小时, TLC显示反应完成。 减压蒸除溶剂, 得到的固体用 30ml乙酸乙酯溶解, 分别用 5%碳酸氢钠 ( 30mL)、 10%柠檬酸 ( 30mL)、 5%碳酸氢钠 (30mL) 及饱和食盐水洗 (2 X 20mL)。 有机相用无水 Na2S04干燥。 滤除 干燥剂, 减压蒸干溶剂, 得到粘稠的白色固体 1.70g, 收率 96.9%。 产品未经纯化, 直 接用于下步皂化反应。
鉴于 DCC缩合法得到的产品不但产率高, 而且色泽较好, 所以本发明中所用到的 其它氨基保护的氨基酸甲酯可以采用实施例(2) 中所述的 DCC缩合法制备, 所有甲酯 均未纯化, 直接用于下步反应。
化合物 m-2aA:按 DCC缩合法利用 1-1,2,3,4-四氢萘甲酸和 la合成; r-2aA:按 DCC 缩合法利用 1- (R) -1,2,3,4-四氢萘甲酸和 la合成; s-2bA: 按 DCC缩合法利用 1- (5) -1,2,3,4-四氢萘甲酸和 lb合成; s-2dA: 按 DCC缩合法利用 1- (S) -1,2,3,4-四氢萘甲酸 和 Id合成; m-2dA: 按 DCC缩合法利用 1-1,2,3,4-四氢萘甲酸和 Id合成; s-2eA: 按 DCC缩合法利用 1- (S) -1,2,3,4-四氢萘甲酸和 le合成; s-2fA: 按 DCC缩合法利用 1- (S) -1,2,3,4-四氢萘甲酸和 If合成; m-2gA: 按 DCC缩合法利用 1- (S) -1,2,3,4-四氢 萘甲酸和 lg合成; s-2aB: 按 DCC缩合法利用 2- (S) -1,2,3,4-四氢萘甲酸和 la合成; *-2aC: 按 DCC缩合法利用 1- (S) -5,6,7,8-四氢萘甲酸和 la合成; s-2bC: 按 DCC缩 合法利用 1-«)-5,6,7,8-四氢萘甲酸和 lb合成; s-2cC:按 DCC缩合法利用 1- ")-5,6,7,8- 四氢萘甲酸和 lc合成; s-2dC: 按 DCC缩合法利用 1- (S) -5,6,7,8-四氢萘甲酸和 Id合 成; s-2eC: 按 DCC缩合法利用 1- (S) -5,6,7,8-四氢萘甲酸和 le合成。 合成的具体化 合物及其性质如下表。
Figure imgf000020_0001
Figure imgf000021_0001
Figure imgf000022_0001
(3) N- (5) -1,2,3,4-四氢萘甲酰基 -L-苯丙氨酸(s-3aA) 的制备
Figure imgf000022_0002
将化合物^ 2aA ( l.Og, 2.96mmol)用 10mL丙酮溶解, 冰水浴下慢慢滴加 2N NaOH 至 pH值为 12〜13, 继续保持冰水浴中反应, TLC检测, 2h后反应完毕。 冰水浴下滴加 盐酸至 pH值为 2〜3,产生大量白色固体,过滤产生的沉淀,用水、乙醚洗涤后真空干燥, 得白色产品 0.89g, 收率 93.6%, m.p.: 146.2〜148.8°C。 1H-NMR (DMSO-d6, 300MHz): 51.50~1.57 (1H, m), 1.67-1.86 (3H, m), 2.61~2.69(2H, m), 2.88-3.16(2H, m), 3.67(1H, t, J = 6.9), 4.49~4.57(1H, m), 7.03-7.10(4H, m), 7.20~7.33(5H, m), 8.31(1H, d, /= 8.2), 12.74(1H, s)。 MS (ESI): observed: m/z 322.2 [M-H]", calcd: 323.3。
本发明中所用到的其它氨基保护的氨基酸可以采用实施例 (3) 中所述的方法制备。 m-3aA: 将 m-2aA采用实施例 (3) 的方法合成; r-3aA: 将 r-2aA采用实施例 (3) 的方 法合成; s-3bA: 将^ 2bA采用实施例(3) 的方法合成; s-3cA: 将^ 2cA采用实施例 (3) 的方法合成; s-3dA: 将^ 2dA采用实施例 (3) 的方法合成; m-3dA: 将 m-2dA采用实施 例 (3) 的方法合成; s-3eA: 将^ 2eA采用实施例 (3) 的方法合成; s-3fA: 将^ 2f A采 用实施例(3)的方法合成; *-3gA:将^ 2gA采用实施例(3)的方法合成; *-3aB:将^ 2aB 采用实施例 (3) 的方法合成; s-3aC: 将^ 2aC采用实施例 (3) 的方法合成; s-3bC: 将 s-2bC采用实施例(3)的方法合成; s- cC: 将^ 2cC采用实施例(3)的方法合成; *-3dC: 将^ 2dC采用实施例 (3) 的方法合成; s-3eC: 将^ 2eC采用实施例 (3) 的方法合成。
Figure imgf000023_0001
Figure imgf000024_0001
Figure imgf000025_0001
二、 式(III) 中化合物的制备: U 化合物 III-a的制备:
(1) (+)-α-蒎烷二醇(化合物 III-2a) 的制备
ΗΟ、
Figure imgf000026_0001
Ή
1 a 2a
将 Me3NO2H20 ( 165.6g, 1.49mol)用 216mL水溶解, 搅拌下依次加入 (+ ) (X-蒎烯 lb ( 191.4g, 1.4mol)、 1L叔丁醇、 108mL吡啶和四氧化锇 (lg, 3.9mmol)。 然后通入氮 气, 10分钟后, 加热至 100°C回流。 TLC检测显示, 72小时反应完毕。 自然降至室温, 加入 NaHS03 (20g, 0.19mol) 搅拌 60分钟, 待溶液颜色变为淡黄色时, 再加入 60g的 NaCl, 再搅拌 10分钟后, 减压蒸除有机溶剂。 釜底残液用 3 X 200mL乙醚提取, 合并有 机相, 并用无水硫酸钠干燥。减压蒸除有机溶剂, 得到的红棕色液体高真空度下减压得白 色固体 230.1g, 收率 96.5 %, [a]D 20 =+8.3° (c =6.5, 甲苯), m.p. : 53-56°C。 ¾-NMR (CDC13, 500MHz): δθ.94 (3H, s), 1.27(3H, s), 1.31(3H, s), 1.37(1H, d, 7 = 5.4), 1.62-1.66 (1H, m), 1.91~1.93(1H, m), 2.01(1H, t, 7= 5.8), 2.18~2.21(1H, m), 2.44~2.48(1H, m), 2.81~2.95(2H, m), 3.97~4.00(2H, q, J = 5.0)。 13C-NMR (CDC13, 125MHz): δ 24.15, 27.89, 28.08, 29.64, 38.18, 39.00, 40.60, 54.10, 69.27, 73.88.
(2)二氯亚甲基锂(化合物 III-3a) 的制备
Figure imgf000026_0002
在 250mL三口瓶中加入无水二氯甲垸(4.26mL, 66mmol)和 120mL无水四氢呋喃, 通入氮气, 降温至一 110°C, 然后慢慢滴加正丁基锂的正己垸溶液 (25.2mL, 60mmol), 滴加完毕后低温继续搅拌 1小时。 溶液直接用于下步反应。
(3)二氯亚甲基硼酸二甲酯(化合物 III-4a) 的制备
Cl、 OCH3
CI OCH3
在一 110°C下, 向上述制备好的化合物 III-3a 的溶液中加入硼酸三甲酯 (7.5mL, 66mmol), 继续低温搅拌 1小时后加入 5N HC1溶液 12mL, 自然升至室温。 反应液转入 分液漏斗, 分出有机相, 水层用乙醚提取 (2 X 10mL), 合并有机相, 无水硫酸钠干燥。 蒸除溶剂得白色粘稠状固体 9.3g, 收率 99.4%。 产品未经纯化直接用于下步反应。
(4)二氯亚甲基硼酸二异丙酯(化合物 III-5a) 的制备
Figure imgf000027_0001
在一 110°C下, 向已制备好的化合物 III-3a 的溶液中加入硼酸三异丙酯 (9.3mL, 40mmol), 继续低温搅拌 2小时后加入 5N HC1溶液 10mL, 自然升至室温。 反应液转入 分液漏斗, 分出有机相, 水层用乙醚提取 (2 X 15mL), 合并有机相, 无水硫酸钠干燥。 蒸除溶剂得白色粘稠状固体 8.73g, 收率 >100 %。 产品未经纯化直接用于下步反应。
(5)二氯亚甲基硼酸 -(+)-α-蒎烷二醇酯(化合物 III-6a) 的制备
Figure imgf000027_0002
方法 a: 从化合物 III-4a出发
在 25mL瓶中加入化合物 II-2a (32.2g, 0. 19mol)和化合物 III-4a ( 51.6g, 0. 33mol)。 再加入 30mLTHF溶解, 室温下搅拌。 TLC检测, 20h后反应完毕。 柱层析分离(乙酸乙 酯: 石油醚 = 1 : 18 )得无色液体 49.4g, 收率 98.9%。 ^-NMR (CDC13, 500ΜΗζ): δ0.85(3Η, s), 1.21(1Η, d, 7 = 11.2), 1.31(3Η, s), 1.46(3Η, s), 1.93~1.97(2Η, m), 2.13 (1Η, t, 7 = 5.2), 2.27~2.30(1H, m), 2.38~2.39(1H, m), 4.47(2H, dd, 7 = 8.8), 5.40(1H, s;)。 13C-NMR (CDC13, 125MHz): 823.90, 26.19, 26.95, 28.19, 35.00, 38.32, 39.23, 51.17, 79.43, 88.03。
方法 b: 从化合物 III-5a出发
在 60mL瓶中加入化合物 II-2a (2g, 0.012mol)和化合物 III-5a (6.36g, 0.03mmol)。 再加入 20mLTHF溶解, 室温下搅拌。 TLC检测, 48h后反应完毕。 柱层析分离(乙酸乙 酯: 石油醚 = 1 : 15 ) 得无色液体 2.92g, 收率 92.7 %。
(6) 2-甲基 -4-氯-丁基硼酸 -(+)-α-蒎烷二醇酯(化合物 III-7a)
Figure imgf000027_0003
于 250mL三口瓶中加入剪碎的镁条 (1.45g, 60mmol)、 70mL无水四氢呋喃, 再加 入一小粒碘, 室温下滴加叔丁基溴(8.22g, 60mmol) 的四氢呋喃溶液 30ml, 滴完后加热 微沸至镁条溶解完毕, 自然冷却得叔丁基格式试剂的四氢呋喃溶液。 干燥放置备用。
将二氯甲基硼酸 -0C-蒎垸二醇酯 III-6a ( 15.78g, 60mmol) 用 lOOmL无水四氢呋喃溶 解。通入干燥的氮气, 并降温至一 78°C, 然后慢慢滴加上述制备好的叔丁基格式试剂的四 氢呋喃溶液, 滴加完毕后, 加入干燥好的 ZnCl2粉末 (4.09g, 30mmol 自然升至室温, 继续室温下搅拌。 TLC检测, 18h后反应完毕。 过滤除去固体, 浓缩后柱层析分离(乙酸 乙酉旨:石油醚 = 1 : 200 )得无色液体 15.26g,收率 S S ^ H-NMR (CDC13, 500MHZ): S0.85(-CH3, s, 3H), 0.92(-CH3, q, J = 6.6, 6H), 1.19(-CH2, d, J = 11.0, 1H), 1.30(-CH3, s, 3H), 1.42(-CH3, s, 3H), 1.60~1.66(-CH2, m, 1H), 1.78-1.80(-CH2, m, 1H), 1.88~1.94(-CH2,-CH, m, 3H), 2.09(-CH, t, 7 = 5.1, 1H), 2.24~2.26(-CH, m, 1H), 2.34~2.37(-CH2, m, 1H), 3.51~3.55(-CH, m, 1H), 4.35~4.37(-CH, m, 1H)。13C-NMR (CDC13, 125MHz): 821.22, 21.27, 22.85, 23.94, 25.58, 25.64, 26.30, 27.02, 28.41, 35.28, 38.25, 39.40, 42.81, 51.26, 78.50, 86.63。
(7) 5-氯-戊基硼酸 -(+)-oc-蒎烷二醇酯(化合物 III-8a)
Figure imgf000028_0001
于 lOOmL三口瓶中加入剪碎的镁条 (0.14g, 6mmol)、 20mL无水乙醚, 再加入一小 粒碘, 室温下滴加正丁基溴 (0.82g, 6mmol) 的乙醚溶液 10ml, 滴完后加热微沸至镁条 溶解完毕, 自然冷却得正丁基格式试剂的乙醚溶液。 干燥处放置备用。
将二氯亚甲基硼酸 -OC-蒎垸二醇酯 III-6a ( 1.58g, 6mmol) 用 20mL乙醚溶解, 室温 下搅拌。 通入氮气, 并降温至一 78°C, 然后慢慢滴加制好的正丁基格式试剂的乙醚溶液。 滴加完毕后, 加入干燥好的 ZnCl2粉末 (0.41g, 3mmol)。 自然升至室温, 继续室温下搅 拌。 TLC检测, 18h后反应完毕。 过滤除去固体, 浓缩后柱层析分离 (乙酸乙酯: 石油醚 = 1: 250)得无色液体 1.44g, L|夂率 84.5 %。 ^-NMR (CDC13, 500MHz): δ0.85(3Η, s), 0.91(3H, t, J = 7.2), 1.18(1H, dd, J = 11.0), 1.30(3H, s), 1.31~1.41(3H, m), 1.42(3H, s), 1.48~1.51(1H, m), 1.82~1.95(4H, m), 2.09(1H, t, J = 5.2), 2.23~2.28(1H, m), 2.33~2.39(1H, m), 3.44~3.48(1H, m), 4.36 (1H, dd, 7 = 8.8)0 13C-NMR (CDC13, 125MHz): 813.91, 22.19, 23.94, 26.34, 27.02, 28.45, 29.50, 33.91, 35.29, 38.22, 39.41, 51.24, 78.51, 86.65。
(8) 1-苯基 -2-氯-乙基硼酸 -(+)-α-蒎烷二醇酯(化合物 III-9a)
Figure imgf000028_0002
于 lOOmL三口瓶中加入剪碎的镁条 (0.12g, 5mmol)、 20mL无水乙醚, 再加入一小 粒碘, 室温下滴加苄氯 (0.63g, 5mmol) 的乙醚溶液 10ml, 滴完后加热微沸至镁条溶解 完毕, 自然冷却得苄氯的格式试剂的乙醚溶液。 干燥处放置备用。
将二氯亚甲基硼酸 -0C-蒎垸二醇酯 III-6a ( 1.31g, 5mmol) 用 20mL乙醚溶解, 室温 下搅拌。 通入氮气, 并降温至一 78°C, 然后慢慢滴加制好的苄氯的格式试剂的乙醚溶液。 滴加完毕后, 加入干燥好的 ZnCl2粉末 (0.41g, 3mmol)。 自然升至室温, 继续室温下搅 拌。 TLC检测, 24h后反应完毕。 过滤除去固体, 浓缩后柱层析分离 (乙酸乙酯: 石油醚 = 1: 15 ) 得无色液体 1.24g, 收率 77.8 %。 -醒1 (CDC13, 500ΜΗζ): δ0.83(3Η, s), 1.07(1H, d, J = 11.0), 1.28(3H, s), 1.37(3H, s), 1.84~1.90(2H, m), 2.05(1H, t, = 4.8), 2.15~2.17(1H, m), 2.30~2.34(1H, m), 3.08~3.23(2H, m), 3.64(1H, q, J = 8.6), 4.32 (1H, q, J = 8.8), 7.21~7.30(5H, m;)。 13C-NMR (CDC13, 125MHz): 823.92, 26.18, 26.99, 28.33, 29.68, 35.14, 38.21, 39.34, 40.42, 51.19, 78.54, 86.77, 126.71, 126.76, 128.34, 129.17,129.23, 138.40。
(9) 1-对甲苯基 -2-氯-乙基硼酸 -(+)-oc-蒎烷二醇酯(化合物 Ill-lOa)
Figure imgf000029_0001
于 lOOmL三口瓶中加入剪碎的镁条 (0.48g, 20mmol)、 30mL无水乙醚, 再加入一 小粒碘, 室温下滴加对甲基苄氯(2.81g, 20mmol) 的乙醚溶液 15ml, 滴完后加热微沸至 镁条溶解完毕, 自然冷却得对甲基苄氯的格式试剂的乙醚溶液。 干燥处放置备用。
将二氯亚甲基硼酸 -0C-蒎垸二醇酯 III-6a (4.52g, 20mmol) 用 30mL乙醚溶解, 室温 下搅拌。通入氮气, 并降温至一 78°C, 然后慢慢滴加制好的对甲基苄氯的格式试剂的乙醚 溶液。 滴加完毕后, 加入干燥好的 ZnCl2粉末 (0.55g, 4mmol)。 自然升至室温, 继续室 温下搅拌。 TLC检测, 24h后反应完毕。 过滤除去固体, 浓缩后柱层析分离 (乙酸乙酯: 石油醚 = 1 : 15 )得无色液体 5.33g,收率 SOJ ^ H-NMR (CDC13, 300MHz): δ0.83(3Η, s), 1.09(1H, d, J = 11.1), 1.28(3H, s), 1.38(3H, s), 1.83~1.92(2H, m), 2.06(1H, t, J = 5.0), 2.14~2.21(1H, m), 2.29~2.37(4H, m), 3.01~3.21(2H, m), 3.58~3.66(1H, m), 4.29-4.36 (1H, m), 7.08-7.16(4H, m;)。 13C-NMR (CDCI3, 75MHz): 821.02, 23.91, 26.10, 26.23, 27.00, 28.33, 35.15, 38.21, 39.35, 40.01, 51.21, 78.52, 86.71, 128.26, 128.96, 129.02, 129.08, 135.30, 136.21。
(10) 1-对氟苯基 -2-氯-乙基硼酸 -(+)-oc-蒎烷二醇酯(化合物 Ill-lla)
Figure imgf000030_0001
于 lOOmL三口瓶中加入剪碎的镁条 (0.24g, 10mmol)、 15mL无水乙醚, 再加入一 小粒碘, 室温下滴加对氟苄溴(3.36g, lOmmol) 的乙醚溶液 10ml, 滴完后加热微沸至镁 条溶解完毕, 自然冷却得对氟苄溴的格式试剂的乙醚溶液。 干燥处放置备用。
将二氯亚甲基硼酸 -OC-蒎垸二醇酯 III-6a ( 2.26g , lOmmol) 用 20mL乙醚溶解, 室温 下搅拌。通入氮气, 并降温至一 78 °C, 然后慢慢滴加制好的对氟苄溴的格式试剂的乙醚溶 液。 滴加完毕后, 加入干燥好的 ZnCl2粉末 (0.27g, 2mmol)。 自然升至室温, 继续室温 下搅拌。 TLC检测, 24h后反应完毕。 过滤除去固体, 浓缩后柱层析分离 (乙酸乙酯: 石 油醚 = 1 : 10 )得无色液体 2.04g,收率 60.7 %。 iH-NMR (CDC13, 500MHz): δ0.82(3Η, s), 1.00(1H, dd, J = 11.1), 1.28(3H, s), 1.36(3H, s), 1.83~1.90(2H, m), 2.06(1H, t, 7 = 5.3), 2.31~2.35(1H, m), 3.04-3.19(2H, m), 3.58~3.63(1H, m), 4.30-4.35 (1H, m), 6.95~6.99(2H, m), 7.22~7.26(2H, m;)。 13C-NMR (CDC13, 125MHz): 823.95, 26.16, 26.99, 28.40, 35.19, 39.35, 39.65, 51.23, 71.49, 78.68, 86.92, 115.21, 130.79, 134.22, 162.90。
(11 ) 2-甲基 -4-氨基-丁基硼酸 -(+)-oc-蒎烷二醇酯盐酸盐(化合物 III-12a)
Figure imgf000030_0002
于 150mL单口瓶中加入 LiN(SiMe3)2 (10mL, lOmmol) , 通入氮气, 并降温至一 78 °C, 然后用注射器慢慢加入含有 2-甲基 -4-氯-丁基硼酸 -OC-蒎垸二醇酯 III-7a ( 2.85g, lOmmol) 的 THF溶液 10mL, 滴加完毕后, 自然升至室温, 继续室温下搅拌。 TLC检测, 20h后反 应完毕。 减压蒸除溶剂, 加入 30mL 正己垸溶解, 过滤除去不溶物。 将滤液降温至一 78 V, 加入 23mL浓度为 1.3M氯化氢的乙醚溶液, 然后自然升至室温, 出现大量乳白色固 体。冷冻使固体完全析出,过滤, 乙醚洗涤产品得乳白色固体 2.11g, 收率 70.1 %。 -NMR (DMSO-d6, 500MHz) : δ0.82(3Η, s), 0.85~0.88(6Η, m), 1.12~1.16(1Η, m), 1.26(3Η, s), 1.37(3Η, s), 145~1.55(2Η, m), 1.72~1.78(2Η, m), 1.87~1.89(1Η, m), 2.00(1Η, t, J = 5.4), 2.17~2.20(1H, m), 2.70~2.76(1H, m), 4.42~4.45(1H, m), 7.42(3H, t, = 50.7), 7.98 (3H, s,)o 13C-NMR (CDC13, 125MHz): 822.07,22.43, 23.53, 24.41, 25.82, 26.75, 28.07, 34.59, 37.76, 38.33, 38.79, 50.69, 75.49, 77.52, 86.55。 MS (ESI): observed: m/z 266.3 [M+H]+, calcd: 265.2。
(12) 5-氨基-戊基硼酸 -(+)-oc-蒎烷二醇酯盐酸盐(化合物 III-13a)
Figure imgf000031_0001
于 150mL单口瓶中加入 LiN(SiMe3)2 (15mL, 15mmol), 通入氮气, 并降温至一 78 °C, 然后用注射器慢慢加入含有 5-氯-戊基硼酸 -0C-蒎垸二醇酯 III-8a ( 4.28g , 15mmol )的 THF 溶液 15mL, 滴加完毕后, 自然升至室温, 继续室温下搅拌。 TLC检测, 18h后反应完毕。 减压蒸除溶剂, 加入 30mL 正己垸溶解, 过滤除去不溶物。 将滤液降温至一 78 °C, 加入 34.5mL浓度为 1.3M氯化氢的乙醚溶液, 然后自然升至室温, 出现大量乳白色固体。 冷 冻使固体完全析出。 过滤, 乙醚洗涤产品得乳白色固体 3.86g, 收率 76.7 %。 -NMR (DMSO-d6, 500MHz): δ0.83(3Η, s), 0.86(3Η, J = 6.6), 1.12~1.16(1Η, m), 1.24~1.32(5Η, m), 1.38(3Η, s), 161~1.63(2Η, m), 1.76 (2Η, d, J = 14.5), 1.88~1.90(1H, m), 2.01(1H, t, J = 5.6), 2.19~2.21(1H, m), 2.32~2.36(1H, m), 2.72~2.74(1H, m), 4.45 (1H, d, J = 8.9), 7.30(3H, t, J = 50.7), 7.90(3H, s;)。 13C-NMR (CDC13, 125MHz): 813.60, 21.79, 23.51, 24.41, 25.87, 26.74, 28.00, 28.85, 34.63, 37.76, 38.79, 50.67, 75.45, 77.53, 86.58。 MS (ESI): observed: m/z 266.3 [M+H]+, calcd: 265.2。
(13) 1-苯基 -2-氨基-乙基硼酸 -(+)-oc-蒎烷二醇酯盐酸盐(化合物 III-14a)
Figure imgf000031_0002
于 lOOmL单口瓶中加入 LiN(SiMe3)2 (10mL, lOmmol) , 通入氮气, 并降温至一 78 °C, 然后用注射器慢慢加入含有 1-苯基 -2-氯-乙基硼酸 -0C-蒎垸二醇酯 III-9a ( 3.19g , lOmmol ) 的 THF溶液 10mL, 滴加完毕后, 自然升至室温, 继续室温下搅拌。 TLC检测, 24h后反 应完毕。 减压蒸除溶剂, 加入 30mL 正己垸溶解, 过滤除去不溶物。 将滤液降温至一 78 V, 加入 23mL浓度为 1.3M氯化氢的乙醚溶液, 然后自然升至室温, 出现大量乳白色固 体。冷冻使固体完全析出。过滤, 乙醚洗涤产品得乳白色固体 2.31g,收率 68.8 %。 -NMR (DMSO-d6, 500MHz): δ0.78(3Η, s), 1.06 (1Η, d, J = 10.9), 1.23(3H, s), 1.26(3H, s), 1.62~1.66(2H, m), 。^園 晷 '^ 丟 ^目 'mmm^ mm η£·ι yat
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°°f66Z 3^3 '+[H+M] e'OOe z∞ : psAJSsqo :(ISH) SM ° ·9 '80·6 '8 ·8 ' 9· ΐ 'SS.98 'OS. LL 'ίξ'θς H 'Z L£ 'VV9£ ^£'V£ ' L6. LZ '£ 9Z '9 9Z 'OS. g : (mmZl '¾XD) ¾ΜΝ-3εΐ °(s 'IK)W.8 \ 09 = '1 'U£)ZVL '(™ Ής)Ζ£^~ΖΓί '(8.8 = [ 'PP 'Ηΐ) '(™ 'ΙΚ)0ΐϋ0.ε '(™ 'HT)e6'2~88'2 '(™ Ή\)ίΖτ~£Ζτ '(™ 'Ηΐ)ΐΐτ~Ζ ·Ζ \V9 = Ί 'Ηΐ)00·Ζ '(™ 'Ηΐ)ε8·ΐ~08·ΐ .96Z.0/600ZN3/X3d 冷冻使固体完全析出。 过滤, 乙醚洗涤产品得乳白色固体 1.93g, 收率 54.6 %。 iH-NMR (DMSO-d6, 500MHz): δ0.77(3Η, s), 0.95 (1Η, d, J = 10.9), 1.22(3H, s), 1.26(3H, s), 1.63~1.66(1H, m), 1.81 (1H, d, J = 5.1), 1.92(1H, t, J = 11.0), 2.06-2.11(1H, m), 2.22~2.27(1H, m), 2.88~2.93(1H, m), 3.01~3.09(2H, m), 4.34~4.36(1H, m), 7.11(2H, t, 7 = 8.9), 7.28~7.31(2H, q, J = 5.7), 7.38(3H, t, J = 50.3), 8.18(3H, s)o 13C-NMR (DMSO-d6, 125MHz): 823.53, 25.78, 26.75, 28.00, 34.41, 37.73, 38.75, 50.59, 77.54, 86.59, 114.93, 115.09, 131.10, 133.24, 160.19, 162.12。 MS (ESI): observed: m/z 318.3 [M+H]+, calcd: 317.2。
2、 化合物 III-b的制备:
(-)-α-蒎烷二醇(化合物 III-2b) 的制备
Figure imgf000033_0001
将 Me3NO * 2H20 ( 11.3g, 102mmol) 用 16mL水溶解, 搅拌下依次加入 (-) (X-蒎烯 lb ( 13.2g, 96.9mmol)、 74mL叔丁醇、 7.4mL吡啶和四氧化锇 (60mg, 0.24mmol)。 然后 通入氮气, 10分钟后, 加热至回流。 TLC检测, 18小时反应完毕。 自然降至室温, 加入 NaHS03 ( 1.2g, 11.5mmol) 搅拌 10分钟, 待溶液颜色变为黄色时, 再加入 20g的 NaCl。 分出有机相, 水层用乙醚提取 (3 X 20mL), 合并有机相, 并用无水硫酸钠干燥。 浓缩后 柱层析分离(乙酸乙酯:石油醚 = 1 : 30),得白色固体 15.33g,收率 92.9 %, [a]D 20 = -10.79° (c =5.5, 甲苯), m.p. : 52-54°C。 ^-NMR (CDC13, 300MHz): δ0.94(3Η, s), 1.28(3H, s), 1.32(3H, s), 1.37(1H, d), 1.66(1H, m), 1.93(1H, m), 2.01(1H, t), 2.20(1H, m), 2.33(2H, s), 2.49(1H, m), 4.00(1H, q); 13C-NMR (CDC13, 75MHz): δ 24.11, 27.80, 28.00, 29.54, 38.21 , 38.99, 40.51, 53.98, 69.26, 73.88; Anal. Calcd. for C10H18O2: C, 70.55; H, 10.66。 Found: C, 70.55; H, 10.67。
(2)二氯亚甲基锂(化合物 III-3b) 的制备
Figure imgf000033_0002
将无水二氯甲垸 (7.1mL, llOmmol) 和 200mL无水四氢呋喃在氮气保护下, 降温 至一 110°C, 然后慢慢滴加正丁基锂的正己垸溶液 (44mL, llOmmol) , 滴加完毕后低温 继续搅拌 1小时。 溶液直接用于下步反应。
(3)二氯亚甲基硼酸二甲酯(化合物 III-4b) 的制备
Figure imgf000034_0001
在一 11CTC下, 向上述制备好的化合物 III-3b 的溶液中加入硼酸三甲酯 (12.5mL, llOmmol) , 继续低温搅拌 1小时后加入 5N HC1溶液 20mL, 自然升至室温。 反应液转入 分液漏斗, 分出有机相, 水层用乙醚提取 (2 X 20mL), 合并有机相, 无水硫酸钠干燥。 蒸除溶剂得白色粘稠状固体 17.6g, 收率 102.1 %。 产品未经纯化直接用于下步反应。
(4)二氯亚甲基硼酸二异丙酯(化合物 III-5b) 的制备
Figure imgf000034_0002
在一 11CTC下, 向已制备好的化合物 III-3b 的溶液中加入硼酸三异丙酯 (10.2mL, 44mmol), 继续低温搅拌 2小时后加入 5N HC1溶液 15mL, 自然升至室温。 反应液转入 分液漏斗, 分出有机相, 水层用乙醚提取 (2 X 20mL), 合并有机相, 无水硫酸钠干燥。 蒸除溶剂得白色粘稠状固体 10.32g, 收率 >110.2%。 产品未经纯化直接用于下步反应。
(5)二氯亚甲基硼酸 -(-)-α-蒎烷二醇酯(化合物 III-6b) 的制备
Figure imgf000034_0003
方法 a: 从化合物 III-4b出发
在 25mL瓶中加入化合物 II-2b (3.23g, 0.019mol)和化合物 III-4b (5.38g, 0.035mol)。 再加入 lOmLTHF溶解, 室温下搅拌。 TLC检测, 18h后反应完毕。 柱层析分离(乙酸乙 酯: 石油醚 = 1 : 20)得无色液体 4.92g, 收率 98.5 %。 ^-NMR (CDC13, 500ΜΗζ): δ0.85(3Η, s), 1.22(1Η, d, 7 = 11.2), 1.31(3Η, s), 1.46(3Η, s), 1.94~1.96(2Η, m), 2.13 (1Η, t, 7 = 5.1), 2.27~2.30(1H, m), 2.36~2.41(1H, m), 4.47(2H, dd, 7 = 8.9), 5.40(1H, s;)。 13C-NMR (CDC13, 125MHz): 823.87, 26.15, 26.92, 28.17, 34.97, 38.29, 39.20, 51.14, 79.40, 88.00。。
方法 b: 从化合物 III-5b出发
在 50mL瓶中加入化合物 II-2b ( 1.70g, O.Olmol)和化合物 III-5b (5.30g, 0.025mmol)。 再加入 15mLTHF溶解, 室温下搅拌。 TLC检测, 48h后反应完毕。 柱层析分离(乙酸乙 酯: 石油醚 = 1 : 15) 得无色液体 2, 38g, 收率 90.8 %。 (6) 2-甲基 -4-氯-丁基硼酸 -(-)-α-蒎烷二醇酯(化合物 III-7b)
Figure imgf000035_0001
于 lOOmL三口瓶中加入剪碎的镁条 (l.lg, 45.8mmol)、 30mL无水乙醚, 再加入一 小粒碘, 室温下滴加叔丁基溴的乙醚溶液 (6.0mL, 45mmol), 滴完后加热微沸至镁条溶 解完毕, 自然冷却得叔丁基格式试剂的乙醚溶液。 干燥放置备用。
将二氯甲基硼酸 -0C-蒎垸二醇酯 III-6b ( 1.18g, 4.49mmol) 用 12mL乙醚溶解, 室温 下搅拌。 通入氮气, 并降温至一 78°C, 然后慢慢滴加制好的叔丁基格式试剂的乙醚溶液 ( 6mL, 4.50mmol), 滴加完毕后, 加入干燥好的 ZnCl2粉末 (0.44g, 3.25mmol)。 自然 升至室温, 继续室温下搅拌。 TLC检测, 18h后反应完毕。 过滤除去固体, 浓缩后柱层析 分离(乙酸乙酯:石油醚 = 1 : 200)得无色液体 1.13g,收率 88.5 %。
Figure imgf000035_0002
500MHz): δ0.85(3Η, s), 0.90~0.94(6H, m), 1.19(1H, dd, J = 11.0), 1.30(3H, s), 1.42(3H, s), 1.63~1.66(1H, m), 1.78-1.80(1H, m), 1.88~1.93(3H, m), 2.09(1H, t, 7 = 5.2), 2.24~2.26(1H, m), 2.33~2.38(1H, m), 3.51~3.55(1H, m), 4.36 (1H, dd, 7 = 8.9)。 13C-NMR (CDC13, 125MHz): 821.29, 21.34, 22.88, 23.97, 25.68, 26.36, 27.07, 28.46, 35.34, 38.30, 39.47, 42.90, 51.35, 78.56, 86.66。
(11) 2-甲基 -4-氨基-丁基硼酸 -(-)-oc-蒎烷二醇酯盐酸盐(化合物 III-8b)
Figure imgf000035_0003
于 lOOmL单口瓶中加入 LiN(SiMe3)2 (5mL, 5mmol), 通入氮气, 并降温至一 78°C, 然后用注射器慢慢加入含有 2-甲基 -4-氯-丁基硼酸 -0C-蒎垸二醇酯 III-7b ( 1.42g, 5mmol) 的 THF溶液 10mL, 滴加完毕后, 自然升至室温, 继续室温下搅拌。 TLC检测, 20h后反 应完毕。 减压蒸馏除去溶剂, 加入 20mL正己垸溶解, 过滤除去不溶物。 将滤液降温至一 78 °C , 加入 12mL浓度为 1.3M氯化氢的乙醚溶液, 然后自然升至室温, 出现大量乳白色 固体。冷冻使固体完全析出,过滤,乙醚洗涤产品得乳白色固体 1.12g,收率 74.6 %。 -NMR (DMSO-d6, 500MHz) : δ0.82(3Η, s), 0.86~0.89(6Η, m), 1.11~1.16(1Η, m), 1.25(3Η, s), 1.37(3Η, s), 144~1.55(2Η, m,), 1.71~1.79(2Η, m), 1.86~1.88(1Η, m), 1.99(1Η, t, 7 = 5.3), 2.17~2.20(1Η, m), 2.30~2.34(1Η, m), 2.70~2.75(1Η, m), 4.41~4.44(1Η, m), 7.45(3Η, t, 7 = 50.7), 8.01(3Η, s;)。 13C-NMR (CDCI3, 125MHz): 822.04, 22.45, 23.54, 24.42, 25.83, 26.76, 28.06, 34.60, 37.77, 38.33, 38.80, 50.68, 75.48 77.52, 86.55。 MS (ESI): observed: m/z 266.3 [M+H]+, calcd: 265.2。。
三、 式(I) 的制备:
1、 硼酸酯化合物 (I) 的制备:
( 1 ) N-1- S ) -1,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-亮氨酸硼酸 -(+)-α-蒎烷二醇酯的制 备(1-1 )
Figure imgf000036_0001
在氮气保护下, 将实施例一中 N-1- ( S) -1,2,3,4-四氢萘甲酰基 -L-苯丙氨酸 (s-3aA ) ( 0.12g , 0.37mmol)溶解在 10ml干燥的 THF中,将体系冷却到 -5 °C,加入 HOBt ( 0.06g , 0.44mmol), 反应 20分钟后, 将体系降温到 -15 °C, 加入 EDC.HCl ( 0.37mmol)。 最后加 入实施例二中的 2-甲基 -4-氨基-丁基硼酸 -0C-蒎垸二醇酯盐酸盐 III-12a ( O.llg , 0.37mmol) 和 NMM ( 0.041mL, 0.37mmol)。 继续保持在 -15 °C反应 1小时, 升至室温反应 2小时, TLC显示反应结束。 过滤除去不溶物, 减压蒸除溶剂, 用 20mL乙酸乙酯溶解, 分别用 5%NaHC03溶液 (20mL)、 10%的柠檬酸溶液 (20mL)、 5%NaHC03溶液 (20M1)、 饱和 食盐水溶液 (2 X 20mL)洗涤。 乙酸乙酯层用无水 Na2S04干燥, 过滤, 浓缩后柱层析 (乙 酸乙酯:石油醚 =1 : 3 )分离得玻璃状固体 0.059g,收率 30.1%。
Figure imgf000036_0002
500MHz): 80.80~0.86(-CH3, m, 9H), 1.19~1.38(-CH3, -CH2, m, 9H), 1.49-1.70 (-CH2, -CH, m, 5H), 1.78-1.83 (-CH2, m, 2H), 1.88~1.93(-CH, m, IH), 2.05~2.07(-CH, m, IH), 2.24~2.26(-CH2, m, IH), 2.58~2.67(-CH2, m, 2H), 2.80~2.88(-CH, m, IH), 2.96-3.11(-CH2, m, 2H), 3.64(-CH, t, J = 6.5, IH), 4.15~4.23(-CH, m, IH), 4.65~4.69(-CH, m, IH), 6.98~7.08(-Ph, m, 4H), 7.21~7.30(-Ph, m, 5H), 8.27(-CONH, dd, J = 8.4, IH), 8.85(-CONH, d, J = 3.2, 1H)0 13C-NMR (DMSO-d6, 125MHz): 820.34, 21.93, 23.02, 24.02, 25.43, 26.28, 27.14, 28.04, 28.60, 29.11, 29.67, 35.49, 38.23, 39.64, 40.08, 46.88, 51.50, 53.73, 69.29, 77.90, 85.89, 126.19 126.80, 127.31, 128.56, 128.65, 129.23, 129.31, 129.73, 129.97, 133.13, 136.56, 137.75, 170.88, 175.09。 MS (ESI): observed: m/z 571.4 [M+H]+, calcd: 570.6。
本发明的其它类似化合物的合成方法可以采用上述的方法。 1-2: 将 m-3aA与 III-12a 反应制备; 1-3: 将 r-3aA与 III-12a反应制备; 1-4: 将 s-3aA与 III-13a反应制备; 1-5: 将 s-3aA与 III-14a反应制备; 1-6:将 s-3aA与 III-15a反应制备; 1-7:将 s-3aA与 III-16a 反应制备; 1-8: 将 s-3bA与 III-12a反应制备; 1-9: 将 s-3cA与 III-12a反应制备; 1-10: 将 m-3dA与 III-12a反应制备; 1-11 :将 s-3dA与 III-12a反应制备; 1-12:将 s-3eA与 III-12a 反应制备; 1-13:将 s-3fA与 III-12a反应制备; 1-14:将 m-3gA与 III- 12a反应制备; 1-15: s-3aB与 III-12a反应制备; 1-16:将 s-3aB与 III-14a反应制备; 1-17:将 s-3aB与 III-15a
Figure imgf000037_0001
Figure imgf000037_0002
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-正亮氨酸硼 酸 -(+)-α-蒎烷二醇酯
^-NMR (CDC13, 500MHz): δ0.82~0.90(6Η, m), 1.15~1.33(8H, m), 1.37(3H, s), 1.42-1.59 (2H, m), 1.60-1.77 (3H, m), 1.79-1.83 (1H, m), 1.88-1.93 (2H, m), 2.02(1H, q, 7 = 5.4), 2.16-2.21(2H, m), 2.31~2.35(1H, m), 2.73~2.79(2H, m), 2.91~3.03(2H, m), 3.59(2H, t, 7 = 5.3),-4 〉 4.28(1H, dd, J = 8.9), 4.65 (1H, q, 7 = 7.6), 5.75(1H, d, 7 = z工 7.8), 6.13(1H, ά, J = 5.2), 6.76 (1H, ά, J = 7.5),
O 7.01~7.11(4H, m), 7.15~7.27(4H, m;)。 13C-NMR (CDC13, L工 z 125MHz): 813.89, 20.30, 22.54, 23.98, 26.29, 27.07, 27.33
28.60, 29.17, 30.66, 35.44, 37.30, 38.18, 39.56, 40.56, 46.86, 51.35, 53.77, 59.27, 77.99, 86.04, 126.22, 126.82, 127.37, 128.55, 129.36, 129.80, 130.05, 133.17, 136.60, 137.80, 170.87, 175.10。
MS (ESI): observed: m/z 569.1 [M-H]—, calcd: 570.6。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-苯基丙氨酸 硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δ0.82~0.86(3Η, m), 1.18(9H, d, J = 10.6), 1.27~1.39(6H, m), 1.62~1.66(1H, m), 1.75-2.05 (3H, m), 2.14~2.22(1H, m), 2.32~2.35(1H, m), 2.43~2.47(2H, m), 2.74~2.92(6H, m), 3.02~3.05(2H, m), 3.26~3.34(1H, m), 4.28~4.32(1H, m), 4.59~4.67(1H, m),-5 5.80~5.90(1H, m), 6.08~6.16(1H, m), 7.01~7.06(4H, m),
7.08-7.12(2H, m), 7.13~7.25(7H, m), 7.28~7.30(1H, m;)。
13C-NMR (CDCI3, 125MHz): 823.99, 26.28, 27.09, 28.54, 29.55, 32.17, 35.40, 36.80, 38.19, 39.59, 40.56, 41.71, 51.47, 53.30, 53.62, 54.08, 69.28, 78.01, 86.00, 125.87, 126.49, 127.03, 128.53, 128.64, 128.80, 129.01, 129.38, 129.58, 134.99, 135.59, 136.58, 139.17, 171.36, 174.94。
MS (ESI): observed: m/z 603.0 [M-H]", calcd: 604.6。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-(4-甲基-苯 基) -丙氨酸硼酸 -(+)·α·蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δθ.83 (9Η, s), 1.17(1H, ά, J = 10.9), 1.24-1.39 (6H, m), 1.45~1.68(2H, m), 1.80-1.88 (4H, m), 1.99~2.13(4H, m), 2.27~2.35(4H, m), 2.63-2.71 (3H, m,), 2.84~2.98(2H, m), 3.57 (1H, t, 7 = 5.4), 4.23~4.31(1H, m), 4.65(1H, q, 7 = 7.0), 5.68(1H, d, 7 = 8.1), 5.98~6.01(1H,-6 m), 6.70~6.78(1H, m), 6.86~6.88(2H, m), 7.01~7.09(6H, m),
7.16~7.23(5H, m;)。 13C-NMR (CDC13, 125MHz): 820.35, 24.03, 26.17, 27.27, 28.04, 29.01, 29.58, 35.42, 37.55, 38.21, 39.61, 46.89, 51.46, 53.44, 69.27, 70.56, 77.89, 85.91, 126.17, 126.87, 127.30, 128.55, 128.85, 129.09, 129.39, 129.74, 129.98, 133.06, 135.70, 136.10, 136.27, 137.75, 171.25, 174.87。
MS (ESI): observed: m/z 619.3 [M+H]+, calcd: 618.6。
Figure imgf000039_0001
123.82, 124.15, 125.34, 126.82, 126.17, 126.66, 127.34,
127.99, 128.72, 129.25, 129.62, 129.87, 133.19, 137.74, 170.89, 175.08。
MS (ESI): observed: m/z 619.0 [M-H]—, calcd: 620.6。
N-(l-l,2,3,4-四氢萘)甲酰基 -L-(p-2-萘基) -丙酰胺 -D-亮氨 酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDC13, 500MHz): δ0.80~0.89(9Η, m), 1.25~1.40(9H, m), 1.60-1.80 (4H, m), 1.87~2.48(6H, m),
,Λ 2.71~2.78(2H, m), 3.07~3.25(3H, m), 3.54~3.56(1H, m),
4.24~4.29(1H, m), 4.71~4.78(1H, m), 5.75-5.86(1H, t, J = 7.9), 6.18~6.31(1H, m), 6.77~6.86(1H, m), 6.94~6.96(1H,-10 ¾ 、 m), 7.06-7.10(2H, m), 7.24~7.28(1H, m), 7.42~7.50(3H, m), 7.70~7.79(3H, m;)。 13C-NMR (CDC13, 125MHz): 820.29, 22.05, 22.94, 24.01, 25.37, 26.27, 27.11, 28.02, 28.53, 29.08, 35.58, 37.47, 38.18, 39.52, 40.57, 46.83, 51.43, 53.79, 69.26, 77.92, 85.89, 123.98, 125.63, 126.03, 126.96, 127.31, 127.62, 127.90, 128.27,128.36, 129.26, 129.70, 132.45, 133.09, 133.46, 134.07, 137.66, 171.00, 175.23。
MS (ESI): observed: m/z 619.0 [M-H]—, calcd: 620.6。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-(p-2-萘基) -丙酰胺 -D-亮 氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δ0.77~0.83(9Η, m), 1.20~1.40(9H, m), 1.70-1.76 (4H, m), 1.86-1.91 (2H, m), 2.00~2.06(1H, m), 2.15~2.17(2H, m), 2.26~2.27(1H, m), 2.68~2.80(2H, m), 3.08~3.21(3H, m), 3.54~3.58(1H, m), 4.23~4.26(1H, m), 4.74~4.79(1H, m), 5.82(1H, t, J = 7.9), 6.17~6.18(1H, m), 6.61(1H, d, J = 7.7), 6.75~6.80(1H, m),-11
7.05-7.11(2H, m), 7.26~7.28(1H, m,), 7.44~7.50(3H, m), 7.73~7.82(3H, m;)。 13C-NMR (CDC13, 125MHz): 820.30, 21.88, 22.95, 24.02, 25.38, 26.25, 27.25, 27.95, 28.54, 29.09, 35.45, 37.41, 38.20, 39.60, 40.58, 46.84, 51.44, 53.70, 69.26, 77.93, 85.90, 125.64, 126.04, 126.09, 127.07, 127.20, 127.29, 127.63, 128.15, 128.28, 129.71, 129.85, 132.46, 132.99, 133.49, 134.09, 137.65, 170.90, 175.22。
MS (ESI): observed: m/z 619.0 [M-H]—, calcd: 620.6。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-缬酰胺 -D-亮氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δ0.81~1.02 (-CH3, m, 15H), 1.24~1.41(-CH3, -CH2, m, 7H), 1.42~1.65(-CH2, -CH, m,-12 4H), 1.80~1.93(-CH2, m, 4H), 1.99-2.01 (-CH2, m, 4H),
2.15-2.23 (-CH2, -CH, m, 3H), 2.30~2.34(-CH, m, 1H), 2.43~2.48(-CH2, m, 1H), 3.20~3.37(-CH, m, 2H), 4.28~4.48(-CH, m, 2H), 6.15~6.23(-CONH, m, 1H), 6.29~6.37(-CONH, m, 1H), 6.77~6.82(-Ph, m, 1H), 7.10(-Ph, dd, J = 8.4, 2H), 7.49-7.51(-Ph, m, 2H)» 13C-NMR
(CDC13, 125MHz) : 814.21, 18.47, 19.33, 22.43, 22.92, 23.98, 25.88, 26.37, 27.13, 28.05, 28.57, 29.36, 31.34, 35.73, 37.93, 39.50, 40.59, 51.44, 54.10, 59.09, 69.30, 77.90, 124.01, 127.83, 129.29, 137.51, 141.44, 171.15。
MS (ESI): observed: m/z 523.3 [M+H]+, calcd: 522.5。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-色酰胺 -D-亮氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δ0.82~0.85 (-CH3, m, 9H), 1.24~1.38(-CH3, -CH2, -CH, m, 10H), 1.62-1.68 (-CH, m, 1H), 1.72~1.82(-CH2, m, 4H), 1.87-1.91(-CH2, m, 1H), 2.16-2.19 (-CH2, m, 1H), 2.30~2.33(-CH, m, 1H),
H 2.46~2.62(-CH, m, 1H), 2.70~2.76(-CH2, -CH, m, 2H),
3.08-3.21(-CH2, -CH, m, 3H), 3.44-3.57 (-CH, m, 1H), 4.23-4.31(-CH, m, 1H), 4.73~4.79(-CH, m, H),-13 5.90~6.03(-CONH, m, 1H), 6.12~6.27(-CONH, m, 1H),
6.89~6.92(-Ph, m, 2H), 7.06-7.19 (-Ph, m, 5H), 7.31~7.38(-Ph, m, 1H), 7.54~7.64(-Ph, m, 1H), 8.19~8.31(-NH, m, 1H;)。 13C-NMR (CDC13, 125MHz) : 820.38, 21.01, 21.88, 22.92, 24.05, 25.41, 26.30, 27.15, 28.91, 29.58, 35.61, 38.17, 39.67, 40.57, 51.60, 46.84, 52.93, 60.36, 69.23, 77.69, 85.67, 111.01, 118.94, 119.75, 122.19, 123.04, 124.02, 126.04, 127.16, 127.83, 129.65, 133.28, 136.20, 137.38, 141.35, 171.56, 175.05。
MS (ESI): observed: m/z 610.0 [M+H]+, calcd: 609.6。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-异亮酰胺 -D-亮氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δ0.81~0.98(15Η, m), 1.26~1.40(11Η, m), 1.55-1.65 (2Η, m), 1.76-1.92 (4H, m), 1.99~2.02(2H, m), 2.12~2.25(2H, m), 2.28~2.33(1H, m), 2.74~2.87(3H, m), 3.19~3.27(1H, m), 3.66~3.72(1H, m),-14 4.24~4.34(1H, m), 5.78~6.32(2H, m), 6.61(1H, d, J = 7.7),
7.05~7.21(4H, m;)。 13C-NMR (CDC13, 125MHz): δΐθ.90, 15.35, 20.37, 21.99, 23.00, 24.03, 24.73, 26.35, 27.57, 28.58, 29.15, 35.62, 36.18, 37.73, 38.50, 39.64, 40.58, 47.07, 51.51, 57.84, 69.28, 77.78, 85.84, 124.00, 126.03, 127.44, 129.86, 133.41, 137.87, 171.40, 175.23。
MS (ESI): observed: m/z 537.4 [M+H]+, calcd: 536.5。
N-2-(S)-l,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-亮氨酸硼酸 -(+)-α-蒎烷二醇酯
-15 (χΛ 。 ^-NMR (CDCI3, 500MHz): δ0.83~0.88(9Η, m),
1.25~1.40(10Η, m), 1.75-1.84 (2Η, m), 1.89-1.91 (1H, m), ), 1.95-2.05 (2H, m), 2.15~2.22(1H, m), 2.28~2.35(1H, m), 2.45~2.51(1H, m), 2.78~3.21(7H, m), 4.27~4.31(1H, m),
4.65~4.68(1H, m), 5.62~5.93(1H, m), 6.28~6.31(1H, m), 7.05-7.10(4H, m), 7.22~7.29(5H, m;)。 13C-NMR (CDC13, 125MHz): 822.00, 22.95, 24.00, 25.44, 26.31, 27.09, 28.54, 32.12 35.47, 38.61, 39.56, 41.75, 51.39, 53.76, 77.98, 85.87,125.82, 126.88, 128.76, 129.35, 134.90, 136.76, z工 171.02, 175.01。
MS (ESI): observed: m/z 571.3 [M+H]+, calcd: 570.6。
N-2-(S)-l,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-苯丙氨酸硼 酸 -(+)-α-蒎烷二醇酯
^-NMR (CDC13, 500MHz): δ0.83(3Η, s), 1.16(9H, d, J = 10.5), 1.28(3H, s), 1.36(3H, s), 1.51-1.66 (4H, m), 1.80-2.35 (5H, m), 2.66~2.75(3H, m), 2.89~2.99(3H, m), 3.26~3.35(1H, m), 3.55~3.58(1H, m), 4.23~4.36(1H, m), 4.68(1H, q, 7 = 7.7), 5.62~5.67(1H, m), 6.01~6.12(1H, m),-16 6.71~6.78(1H, m), 6.94~7.01(2H, m), 7.04-7.10(4H, m),
7.14~7.25(7H, m;)。 13C-NMR (CDC13, 125MHz): 823.98, 26.13, 27.29, 28.59, 28.99, 29.54, 35.38, 37.25, 38.19, 39.58, 40.56, 46.86, 51.44, 53.43, 69.28, 77.78, 77.94, 85.96, 126.23, 126.36, 126.94, 127.38, 128.43, 128.62, 128.99, 129.06, 129.26, 129.43, 129.83, 130.05, 133.11, 136.32, 137.82, 139.35, 171.39, 175.01。
MS (ESI): observed: m/z 603.0 [M-H]", calcd: 604.6。
N-2-(S)-l,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-(4-甲基-苯 基) -丙氨酸硼酸 -(+)·α·蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δθ.85 (9Η, s), 1.95~1.41(1H, m), 1.50~1.56(2H, m), 1.81-1.93 (3H, m), 1.99~2.06(1H, m), 2.10~2.19(1H, m), 2.28~2.33(4H, m), 2.40~2.46(1H, m),-17
2.61~2.66(1H, m), 2.80~3.08(4H, m), 3.28~3.55(3H, m), 4.29~4.32(1H, m), 4.5~4.62(1H, m), 5.66~5.69(1H, m), 6.11~6.14(1H, m), 6.86~6.91(1H, m), 7.03~7.09(4H, m), 7.11~7.28(8H, m)。
MS (ESI): observed: m/z 617.3 [M-H]", calcd: 618.6。
N-l-(S)-5,6,7,8-四氢萘甲酰基 -L-苯丙酰胺 -D-亮氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): δ0.82~0.90(9Η, m), 1.23~1.44(10Η, m), 1.68-1.75 (4Η, m), 1.81-1.84 (1H, m), 1.89-1.91 (1H, m), 2.00~2.05(1H, m), 2.17~2.21(1H, m),-18 2.26~2.34(1H, m), 2.64~2.76(4H, m), 3.11~3.25(3H, m),
4.28~4.31(1H, m), 4.82~4.84(,1H m), 5.79~6.15(1H, m), 6.28~6.35(1H, m), 6.96~7.09(3H, m), 7.24~7.30(5H, m;)。
13C-NMR (CDCI3, 125MHz): 822.00, 22.63, 22.95, 24.04, 25.35, 26.34, 26.63, 27.13, 28.58, 29.82, 32.12 35.56, 38.32, 39.60, 40.00, 40.61, 51.43, 54.08, 69.30, 77.93, 85.91, 123.99, 125.18, 126.94, 128.66, 129.34, 131.05, 134.99,
135.99, 136.78, 138.19, 170.14, 170.91。
MS (ESI): observed: m/z 571.3[M+H]+, calcd: 570.6。
N-l-(S)-5,6,7,8-四氢萘甲酰基 -L-(p-l-萘基) -丙酰胺 -D-亮 氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDC13, 500MHz): δ0.72~0.84(9Η, m), 1.17~1.39(10H, m), 1.70-1.79 (5H, m), 1.87-1.91 (1H, m), ), 198~2.03(1H, m), 2.16~2.18(1H, m), 2.25~2.33(1H, m), 2.68~2.78(4H, m), 3.05~3.13(1H, m), 3.43~3.50(1H, m), 3.72~3.77(1H, m), 4.24~4.28(1H, m), 4.93~4.99(1H, m), 5.43~5.77(1H, m), 6.52~6.60(1H, m), 6.95~7.11(3H, m),-19 7.36~7.43(2H, m), 7.48~7.52(1H, m), 7.58~7.62(1H, m),
7.74~7.78(1H, m), 7.85(1H, t, = 7.1), 8.38(1H, d, J = 8.5)。 13C-NMR (CDCI3, 125MHz): 822.00, 22.58, 22.89, 23.98, 25.34, 26.23, 26.60, 27.08, 28.55, 29.77, 35.39, 38.14, 39.57, 51.39, 53.85, 66.64, 77.93, 85.90, 123.96, 124.11, 125.18, 125.41, 125.86, 126.69, 127.84, 128.16, 128.77, 131.05, 132.06, 132.83, 133.93, 134.94, 136.04, 138.17, 170.29, 170.90。
MS (ESI): observed: m/z 619.3 [M-H]", calcd: 620.6。
N-l-(S)-5,6,7,8-四氢萘甲酰基 -L-(p-2-萘基) -丙酰胺 -D-亮 氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): 80.77~0.83(-CH3, m, 9H), 1.12~1.24(-CH2, -CH, m, 2H), 1.27~1.28(-CH3, m, 3H), 1.33~1.45(-CH3, -CH2, -CH, m, 6H), 1.70~1.73(-CH2, m, 2H), 1.76~1.80(-CH, m, 1H), 1.86-1.88 (-CH2, -CH, m, 2H), 1.99~2.05(-CH2, -CH, m, 2H), 2.15~2.17(-CH2, m, 2H), 2.28~2.30(-CH, m, 1H), 2.70~2.76(-CH2, m, 2H), 3.05-3.19(-CH2, m, 2H), 3.54~3.57(-CH, m, 1H), 4.23~4.26(-CH, m, 1H), 4.74~4.79(-CH, m, 1H), 5.78-5.85(-CONH, m, 1H), 6.18(-CONH, s, 1H),-20 ¾χ尋 6.75~6.79(-Ph, m, 1H),7.07~7.09(-Ph, m, 2H),
7.26~7.28(-Ph, m, 1H), 7.44~7.50(-Ph, m, 3H), 7.58~7.62(-Ph, m, 1H), 7.74~7.78(-Ph, m, 1H), 7.73~7.76(-Ph, m, 2H), 7.79~7.82(-Ph, m, 1H)0 13C-NMR (CDCI3, 125MHz) : 820.31, 21.90, 22.98, 24.04, 25.55, 26.37, 27.14, 27.33, 28.56, 28.78, 29.11, 35.48, 37.60, 38.22, 39.85, 46.75, 51.42, 53.77, 65.84, 77.94, 85.93, 125.71, 126.07, 127.08, 127.22, 127.34, 127.41, 127.65, 128.09, 128.37, 129.73, 129.88, 132.49, 133.05, 133.52, 134.11, 137.64, 170.93, 175.24。
MS (ESI): observed: m/z 619.3 [M-H]", calcd: 620.6。 N-l-(S)-5,6,7,8-四氢萘甲酰基 -L-亮酰胺 -D-亮氨酸硼酸
-(+)-α-蒎烷二醇酯
^-NMR (CDC13, 500MHz): S0.84(-CH3, s, 3H), 0.89~0.92(-CH3, m, 6H), 0.96~0.98(-CH3, m, 6H), 1.25~1.28(-CH3, -CH2, m, 4H), 1.37~1.39(-CH3, m, 3H), o 1.44~1.50(-CH2, m, 2H), 1.59-1.68 (-CH2, m, 2H), z工 1.73-1.78 (-CH2, -CH, m, 6H), 1.83-1.84 (-CH, m, 1H),
1.86~1.89(-CH2, m, 1H), 1.99~2.05(-CH, m, 1H),
/工 z
-21 2.17~2.19(-CH2, m, 1H), 2.30~2.35(-CH2, m, 1H),
〉,■· β 2.78(-CH2, s, 2H), 2.83(-CH2, s, 2H), 3.08~3.31(-CH, m,
1H), 4.28-4.31(-CH, m, 1H), 4.62~4.67(-CH, m, 1H), 6.17(-CONH, dd, 7 = 8.5, 13.9, 1H), 6.43~6.60(-CONH, m, 1H), 7.06-7.12(-Ph, m, 3H)。 13C-NMR (CDC13, 125MHz): 822.14, 22.37, 22.50, 22.67, 22.85, 23.00, 24.07, 24.88, 25.68, 26.35, 26.74, 27.17, 28.65, 29.88, 35.61, 38.27, 39.67, 40.05, 41.21, 50.94, 51.53, 78.02, 85.90, 124.08, 125.33, 131.18, 135.05, 136.24, 138.37, 170.41, 172.12。
MS (ESI): observed: m/z 535.3 [M-H]", calcd: 536.5。
N-l-(S)-5,6,7,8-四氢萘甲酰基 -L-缬酰胺 -D-亮氨酸硼酸 -(+)-α-蒎烷二醇酯
^-NMR (CDCI3, 500MHz): S0.84(-CH3, s, 3H), 0.87~0.92(-CH3, m, 6H), 0.99~1.04(-CH3, m, 6H), 1.20(-CH2, t, 7 = 7.0, 1H), 1.24~1.30(-CH3, -CH, m, 4H), 1.36~1.38(-CH3, m, 3H), 1.43-1.51(-CH2, m, 2H), 1.64~1.66(-CH, m, 1H), 1.77-1.85 (-CH2, -CH, m, 5H), 1.89(-CH2, s, 1H), 2.01~2.04(-CH, m, 1H), 2.15~2.18(-CH2, -CH, m, 2H), 2.30~2.33(-CH2, m, 1H), 2.78~2.89(-CH2, m,-22 β 4H), 3.16~3.28(-CH, m, 1H), 4.28~4.30(-CH, m, 1H),
4.42~4.47(-CH, m, 1H), 6.29(-CONH, s, 0.5H), 6.36(-CONH, q, J = 9.3, 1H), 6.46(-CONH, s, 0.5H), 7.06-7.12(-Ph, m, 2H), 7.06~7.12(-Ph, d, J = 7.0, 1H)0 13C-NMR (CDCI3, 125MHz): δ 18.42, 19.11, 22.01, 22.59, 22.93, 23.98, 25.58, 26.24, 26.71, 27.07, 28.57, 29.80, 31.38, 35.53, 38.18, 39.56, 39.86, 51.41, 58.09, 60.33, 65.80, 77.93, 85.82, 124.06, 125.24, 131.00, 134.86, 136.46, 138.22, 170.35, 171.20。
MS (ESI): observed: m/z 521.4 [M-H]", calcd: 522.5。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-亮氨酸硼酸 -(-)-α-蒎烷二醇酯
-23 ^-NMR (DMSO-d6, 500MHz): S0.82~0.88(-CH3, m, 9H),
1.19~1.28(-CH3, -CH2, m, 4H), 1.31-1.48 (-CH3, -CH2, -CH, m, 6H), 1.71-1.83 (-CH2, m, 3H), 1.87~1.92(-CH2, m, 2H), 2.00~2.05(-CH, m, 1H), 2.16~2.19(-CH2, -CH, m, 2H), 2.28~2.33(-CH2, m, IH), 2.72~2.80(-CH2, m, 2H), 2.91-3.02
(-CH2, m, 2H), 3.07-3.11(-CH, m, IH), 3.59(-CH, q, 7 = 5.3, IH), 4.25~4.29(-CH, m, IH), 4.63~4.69(-CH, m, IH), 5.80(-CONH, dd, J = 7.7, 22.8, IH), 5.96-6.19(-CONH, m, IH), 6.77(-Ph, dd, J = 7.6, 12.4, IH), 7.03-7.10(-Ph, m, 4H), 7.17 (-Ph, t, J = 7.4, IH), 7.20-7.27 (-Ph, m, 3H)» 13C-NMR (DMSO-d6, 125MHz): 820.34, 21.82, 23.12, 24.06, 25.32, 26.37, 27.17, 28.59, 29.12, 35.62, 37.38, 38.22, 39.66, 40.04, 46.90, 51.52, 53.64, 77.85, 85.79, 126.32, 126.93, 127.46, 128.67, 129.41, 129.87, 130.13, 133.18, 136.58, 137.86, 171.25, 175.23 o
MS (ESI): observed: m/z 593.3 [M+Na]+, calcd: 570.6。
N-1-(S)-1,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-亮氨酸硼酸的制备(IV)
Figure imgf000045_0001
方法 a: 酯交换法
将 N-l-( -l,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-亮氨酸硼酸 -0C-蒎垸二醇酯 (0.5g, 0.876mmol)用 6mL的甲醇溶解, 加入 2-甲基丙基硼酸(0.27g, 2.63mmol)及 6mL己垸, 最后加入 HC1溶液 (2N, 1.5mL), 室温搅拌反应。 5小时后 TLC显示反应完成。 分层, 下层用 10mL己垸洗涤 1遍, 加压蒸干。 过柱, 先用乙酸乙酯冲洗, 最后用甲醇冲洗得到 无色固体 0.33g, 收率 87.3%。 iH-NMR (CDC13, 500MHz): 80.81~0.88(-CH3, m, 6H), 1.30~1.66(-CH2, m, 6H), 1.76~1.78(-CH, m, IH), 2.63~2.65(-CH2, m, 2H), 2.77~2.80(-CH, m, IH), 2.98~3.05(-CH2, m, 2H), 3.63~3.65(-CH, m, IH), 4.52~4.61(-CH, m, IH), 5.98-6.14(-CONH, m, IH), 6.73~6.80(-CONH, m, IH), 7.04~7.25(-Ph, m, 7H), 7.35~7.42(-Ph, m, IH), 7.52~7.73(-Ph, m, IH). 13C-NMR (CDC13, 125MHz): 820.47, 20.52, 24.00, 26.87, 28.69, 29.53, 37.42, 38.13, 45.24, 53.65, 55.78, 71.1, 125.28, 125.96, 126.13, 127.88, 128.08, 128.78, 129.19, 135.07, 136.86, 137.91, 170.62, 173.64。 MS (ESI): observed: m/z 437.1 [M+H]+, calcd: 436.4。
方法 b: 氧化断裂法
将 N-l-( -l,2,3,4-四氢萘甲酰基 -L-苯丙酰胺 -D-亮氨酸硼酸 -oc-蒎垸二醇酯 (0.1g, 0.175mmol)用 5mL的丙酮溶解,加入 NH4OAC溶液(0.1N, 4mL),最后加入 NaIO4(0.11g, 0.525mmol), 室温搅拌反应。 TLC检测显示, 10h后反应完全。 向反应溶液中加入 NaOH 溶液 (2N, 3mL), CH2C12萃取。 用浓盐酸调节溶液 pH值约为 3。 用 CH2C12萃取 (3 X 15mL), 合并有机相, 无水 Na2S04干燥, 过滤, 蒸干得到无色固体 62.1mg, 收率 81.3 %。 第二部分 抑制蛋白酶体活性测定
蛋白酶体抑制活性
本方法利用荧光底物多肽 Suc-Leu-Leu-Val-Tyr-AMC (简写 Suc-LLVY-AMC, Sue表 示琥珀酰基, AMC表示 7-酰胺 -4-甲基香豆素)在蛋白酶体作用下会发生水解, 释放出具 有荧光的 AMC (Ex: 380nm, Em: 460nm) 的原理, 通过改变待测化合物浓度, 测得不 同浓度药物作用后的蛋白酶体催化底物得到的产物荧光值判断药物对酶的抑制程度,从而 计算药物对蛋白酶体抑制的 IC5Q值。
本实验所用的蛋白酶体为人红细胞 20S蛋白酶体, 酶、荧光底物及测试缓冲液均购自 biomol公司。 实验体系为 100ul, 其中含有蛋白酶体 90μ1 (0.2 g) , 底物 10μ1, 其终浓度 为 50μΜ, 药物 (抑制剂) 0.1μ1, 其终浓度为 10—?^!〜^11^! , 实际配置浓度为 10— 4Μ〜 10— 8Μ。 具体实验过程如下:
1、 药物配置:
准确称量药物, 加入 DMSO溶解至 10— 2Μ。 用移液器吸取 ΙΟμΙ加至 90 lDMSO得到 10— 3M,然后从 10— 3M浓度药物中吸取 ΙΟμΙ加 90 lDMSO得到 10— 4M,同样方法得到 10— 5 M、 10— 6 M、 10— 7 M、 10— 8 M浓度的药物。
2、 底物制备:
将 5mg底物 Suc-LLVY-AMC (mw:763.9) 粉末溶解于 654 lDMSO中, 得到 10mM 储备液, -20°C保存, 使用时用缓冲液稀释 20倍, 每份样品中加入 10μ1, 使得反应体系中 的底物浓度为 50μΜ。
3、 反应体系制备:
将 20S蛋白酶体 (1μ§/μ1) 以缓冲溶液稀释成浓度为 0.0022μ§/μ1的溶液, 96孔荧光 酶标板中每孔加入 90μ1, 然后每孔中加入 Ο.ΐμΐ待测样品, 使用已上市药物万珂为阳性对 照药, 同时空白对照组及本底对照组中加入 0.1 l DMSO, 37°C反应 20min。 反应完毕后, 每孔加入 ΙΟμΙ荧光底物,避光 37°C反应 1小时, 380nm/ 460nm荧光酶标仪(Tecan, Infinite M200) 检测荧光值。
4、 数据处理
计算扣除本底后不同浓度药物作用下所得产物的荧光值, 运用 SPSS软件, 计算药物 对蛋白酶体抑制的 IC5Q浓度。
部分化合物的结果如下表:
Figure imgf000047_0002
其中, Velcade-diol (二醇基万珂) 的
Veilcade (万珂) 的化学结构式
Figure imgf000047_0001
本发明化合物的治疗剂量可以根据例如该治疗的具体用途, 化合物的给药方式, 病 人的健康状况, 以及处方医生的判断而改变。 药物组合物中本发明化合物的比例或浓度 将随多种因素而改变, 包括剂量, 化学特性(如疏水性), 以及给药途径。 例如, 本发明 化合物可以提供于含有大约 0.1到大约 10%w/v化合物的水性生理缓冲液中用于非肠道 给药。 一些通常的剂量范围为每天大约 1 μ g/kg到大约 lg/kg体重。 在一些实施方案中, 剂量范围从每天大约 O.Olmg/kg体重到大约 100mg/kg体重。剂量极可能取决于这样的变 量, 如疾病或失调的类型和进展程度, 特定病人的总体健康状态, 选定的化合物的相对 生物学功效, 赋形剂的配方, 及其给药途径。 有效剂量可以从来自体外或动物模型测试 系统的剂量反应曲线推出。

Claims

权利要求书
1、 一种肽硼酸及其酯类化合物, 其结构如式 I所示,
Figure imgf000048_0001
其中:
1^或1 2分别独立地为取代或非取代的 Cl〜10的垸基、 C3〜6的环垸基或杂环垸基、 苄基、 萘甲基或 D引哚甲基, 其中所述的取代基为 Cl〜4的垸基、 氰基、 羟基、 巯基、 氨基 或卤素;
¾或∑2分别独立地为羟基、 Cl〜10的垸基、 Cl〜10的垸氧基或芳氧基, 或者 B、 ¾和∑2—起形成含有 N、 S或 0的杂环基团;
Pg为取代或非取代的至少含有一个不饱和环的二环酰基或三环酰基基团, 其中所述 的取代基为 Cl〜4的垸基、 Cl〜4的垸氧基、 卤素或 Cl〜4的卤代垸基。
2、 根据权利要求 1所述的肽硼酸及其酯类化合物, 其中
!^或 R2分别独立地为取代或非取代的 Cl〜10的垸基、 苄基、 萘甲基或吲哚甲基, 其中所述的取代基为 Cl〜4的垸基或卤素。
3、 根据权利要求 2所述的肽硼酸及其酯类化合物, 其中
为取代或非取代的 Cl〜10的垸基、 苄基、 1-萘甲基、 2-萘甲基或吲哚甲基, 其中 所述的取代基为 Cl〜4的垸基或卤素。
4、 根据权利要求 2所述的肽硼酸及其酯类化合物, 其中
R2为取代或非取代的 Cl〜10的垸基或苄基,其中所述的取代基为 Cl〜4的垸基或卤 素。
5、 根据权利要求 1所述的肽硼酸及其酯类化合物, 其中
¾或∑2分别独立地为羟基、 Cl〜10的垸基、 Cl〜10的垸氧基或芳氧基, 或者 B、 ¾和 Z2—起形成硼酸 -0C-蒎垸二醇酯。
6、 根据权利要求 5所述的肽硼酸及其酯类化合物, 其中
¾或 Z2分别独立地为羟基, 或者 B、 ¾和 Z2—起形成硼酸 -0C-蒎垸二醇酯。
7、 根据权利要求 1所述的肽硼酸及其酯类化合物, 其中
Pg为取代或非取代的四氢萘酰基, 其中所述的取代基为 Cl〜4的垸基、 Cl〜4的焼 氧基、 卤素或 Cl〜4的卤代垸基。
8、 根据权利要求 7所述的肽硼酸及其酯类化合物, 其中
Pg为:
Figure imgf000049_0001
R3或 R4分别独立地为氢、 甲基、 乙基、 甲氧基、 乙氧基、 氟、 氯、 溴或三氟甲基 t
9、 一种权利要求 1所述的肽 ί 酸及其酯类化合物的制备方法, 其反应路线为:
Figure imgf000049_0002
其中 、 R2 、 ΊΛ、 Z2和 Pg的定义如权利要求 1所述
10、权利要求 1至 8中任一项所述的肽硼酸及其酯类化合物在制备抗肿瘤药物方面的应用。
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