CN107629039A - The preparation method and intermediate of deuterated acrylamide - Google Patents

The preparation method and intermediate of deuterated acrylamide Download PDF

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CN107629039A
CN107629039A CN201710949642.XA CN201710949642A CN107629039A CN 107629039 A CN107629039 A CN 107629039A CN 201710949642 A CN201710949642 A CN 201710949642A CN 107629039 A CN107629039 A CN 107629039A
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compound
deuterated
organic solvent
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acrylamide
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CN107629039B (en
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常俊标
杜锦发
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Henan Genuine Biotech Co Ltd
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Henan Meitaibao Bio-Pharmaceutical Co Ltd</en></name>
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Abstract

The invention discloses a kind of preparation method and intermediate of deuterated acrylamide, belongs to organic synthesis field.The structure of the deuterated acrylamide is shown in formula I.The preparation method includes the step of route shown below:Compound a 1 reacts to obtain compound a 2 in the presence of a base with diethoxy oxygen phosphorus acetic acid, and compound a 2 reacts to obtain compound I with two deuterated polyformaldehyde or two deuterated formaldehyde in the presence of a base.Compound a 2 can also react to obtain compound a 3 by compound a 1 and halogenated acetic acids or haloacetyl chloride, and gained Haloacetamide reacts to obtain with triethyl phosphite again.The method for preparing compound of formula I has the advantages that high income, purity are high, and process repeatability is good.

Description

The preparation method and intermediate of deuterated acrylamide
Technical field
The present invention relates to the preparation method of deuterated acrylamide and intermediate, belongs to organic synthesis field.
Background technology
Deuterated compound is in the important purposes of many of drug research.They are not only used as not by deuterated medicine Alternative medicine, it is also used as the isotopic standard product of drug metabolism study.Acrylic acid derivative has many use in terms of medicine On the way, for example irreversible selective EGFR inhibition from mutation agent AZD9291 of the third generation and other EGFR suppressions containing acrylic amide Preparation (such as DY3002, WZ4002, CI-1033, CO-1688, EGF816, ASP8273, PF-06747775 etc.).AZD9291 is Through being approved by the fda in the United States for treating lung cancer.The purposes of deuterated acrylic acid and its derivative in terms of industry and medicine is more and more It is more.But the synthetic method of deuterated acrylic acid and its derivative is seldom reported.United States Patent (USP) (US Pat.4874890) discloses Using RuCl3Catalyst, deuterium or heavy water directly substitute the method for hydrogen in double bond to prepare deuterated acrylic compounds.Chemical combination Activity order deuterated thing A is (a)=(b)>(c).But in RuCl3In the presence of, deuterated reaction reaches 45%.It is caused Mixture does not have Practical significance in most instances.
Yang discloses the preparation of tri- deuterated acrylic acid of 2,3,3- in United States Patent (USP) (US Pat.8829238).With propine Sour II is raw material, is exchanged into deuterated propiolic acid sodium III with heavy water in the presence of a base, then under deuterium, is urged with Lindlar catalyst Change deuterate and obtain the required deuterated PAA IV of product 2,3,3- tri-.But when quality and the reaction of Lindlar catalyst Between can all influence the purity of product.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide the preparation method of the deuterated acrylamide of Formulas I structure, realize Produce deuterated acrylamide to high yield, high-purity.
Wherein,
R is selected from substitution or unsubstituted alkyl, cycloalkyl, heterocyclic radical, aryl or heteroaryl;Substituent be selected from halogen, Hydroxyl, optionally by alkyl-substituted amino, amino acid group, amino-acid ester group, alkyl, alkoxy, alkylthio group, cycloalkyl, Cycloalkyloxy, cycloalkylthio, heterocyclic radical, aryl, aryloxy group, arylthio, heteroaryl, nitro, cyano group ,-N3, sulfonyl, sulfuric acid Foundation, phosphono, phosphoric acid foundation, phosphonato;
Alkyl in the alkyl, alkoxy, alkylthio group is each independently the C of straight or branched1~C20Alkyl, it is optional Ground is the C of straight or branched1~C16Alkyl, it is optionally the C of straight or branched1~C10Alkyl, it is optionally straight or branched C1~C6Alkyl, it is optionally the C of straight or branched1~C4Alkyl;
Cycloalkyl in the cycloalkyl, cycloalkyloxy, cycloalkylthio is each independently C3~C20Monocyclic or polynaphthene Base, it is optionally C3~C15Monocyclic or multi-ring alkyl, is optionally C3~C10Monocyclic or multi-ring alkyl, is optionally C3~C7It is single Ring or multi-ring alkyl;
The heterocyclic radical is 1-3 carbon atom in the cycloalkyl by selected from one or more of O, S, N hetero atom The group of replacement;
Aryl in the aryl, aryloxy group, arylthio is each independently C6~C18Monocyclic or polyaromatic, alternatively For C6~C14Monocyclic or polyaromatic, is optionally C6~C10Monocyclic or polyaromatic;
The heteroaryl is to be selected from heteroatomic 5~20 unit monocycle of N, O, S or polyheteroaromatic containing 1~3, alternatively For 5~15 unit monocycles or polyheteroaromatic, 5~10 unit monocycles or polyheteroaromatic are optionally;
The halogen is selected from:F、Cl、Br、I;
Preferably, the alkyl can be optionally by halogen, hydroxyl ,-N (R1)(R2)、C1-5Alkoxy, C3-6Cycloalkanes Epoxide, phenoxy group, C1-5Alkylthio group, C3-5Cycloalkylthio, thiophenyl, nitro, cyano group ,-N3In one or more Substitution;
Preferably, the cycloalkyl, heterocyclic radical, aryl, heteroaryl can be optionally by halogen, C1-5Alkyl, hydroxyl ,-N (R1)(R2)、C1-5Alkoxy, C3-6Cycloalkyloxy, C1-5Alkylthio group, C3-5Cycloalkylthio, phenoxy group, thiophenyl, nitre Base, cyano group ,-N3, sulfonyl, sulphate groups, phosphono, phosphoric acid foundation, one or more kinds of substitutions in phosphonato;
R1、R2It is each independently hydrogen, alkyl;
Preferentially, R is the group shown in i:
Wherein, each R3It independently is alkyl, preferably C1-C3Alkyl, the alkyl are optionally deuterated;
Preferably, R is the group shown in i-1:
Preferably, above-mentioned compound of formula I, it is characterised in that the compound of formula I is following formula: compound Ia:
Researcher's experiment of the present invention compares the several method of following preparation compound of formula I:
Wherein, R is as described above.
Method one:
Compound 1 and pyruvic acid or acetone acyl chloride reaction generation compound 2, in the presence of alkali or catalyst in heavy water Deuterium is exchanged to obtain compound 3, then generates compound 4 with sodium borohydride reduction, and compound 4 is handled with sulfonic acid chloride in the presence of a base Obtain compound I.But deuterated product 3 is unstable, it is difficult to is stablized and high deuterated target product.
Method two:
Pyruvic acid 5 is deuterated in heavy water in the presence of a base to obtain compound 6, is changed with sodium borohydride reduction compound 6 Compound 7, then be dehydrated with concentrated hydrochloric acid to obtain compound 8, the latter and R-NH2Reaction generation compound I.It is deuterated in this synthetic route The molecule of acrylic acid 8 is small, it is difficult to isolated and purified, so, this synthetic route is not readily used for preparing on a large scale.
Method three:
Compound a -1 generates compound a -2 in the presence of condensing agent with diethoxy oxygen phosphorus acetic acidreaction;Compound a -2 React to obtain compound I with two deuterated polyformaldehyde or two deuterated formaldehyde in the presence of a base.Compound a -2 can also pass through compound A-1 and halogenated acetic acids or haloacetyl chloride react to obtain compound a -3, gained Haloacetamide a-3 again with phosphorous triethylenetetraminehexaacetic acid Ester reaction is made.
Found in experiment, compound a -1 generates compound a -2 in the presence of condensing agent with diethoxy oxygen phosphorus acetic acidreaction It is an exothermic reaction, adds 2- (7- aoxidizes BTA)-N, N, N', N'- tetramethylurea hexafluorophosphoric acid esters (HATU) condensation During agent, controlling reaction temperature preferentially selects 0-25 DEG C at 0-50 DEG C, otherwise will increase side reaction.Decline yield, purification difficult.
Compound a -2 reacts to obtain compound I with two deuterated polyformaldehyde or two deuterated formaldehyde in the presence of a base, is made with KOH It is more preferable to add the product quality of LiCl reaction gained and yield while alkali.Experiment finds the alkaline extremely important of reaction solution, Preferentially, pH controls are in 10-12, pH<When 10, the alkalescence of reaction solution is not enough to deprotonation and triggers Wittig to react.But such as Too big (the pH of fruit alkalescence>12) other side reactions such as amide hydrolysis can, then be caused.
Compound a -1 reacts to obtain compound a -3 in the presence of HATU with halogenated acetic acids, and this condensation reaction is also that heat release is anti- Should, it may be preferable that controlling reaction temperature is at less than 25 degree Celsius, to improve reaction yield.
Compound a -1 reacts generation compound a -3 with haloacetyl chloride in the presence of a base, it is preferable that alkali used is selected from such as The organic bases such as pyridine, triethylamine;Preferentially, reaction temperature control is at less than 25 degree Celsius.
Compound a -3 in the presence of a base with triethyl phosphite react generation compound a -2 ((J.Org.Chem.1996, ), 61,7202) alkali is selected from organic base;Preferably, selected from such as pyridine, triethylamine etc.;In the reaction, it is optionally added organic Solvent;Preferably, the organic solvent is selected from aprotic solvents;Preferably, the organic solvent is selected from:THF,CH2Cl2, DMF etc..
The present invention also provides the useful intermediates as shown in formula a-2I and a-3I:
The method provided by the invention for preparing compound of formula I has that yield is high, and up to more than 30%, purity is high, up to 95% with On, the advantages that process repeatability is good, it is adapted to industrialized production.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific Being given for example only property of embodiment the present invention will be described, be not intended to limit the invention.
The compound Ia of embodiment 1. synthesis
Synthetic route is as follows:
1st, a-2I is prepared from diethoxy oxygen phosphorus acetic acid:By a-1I (5g, 0.011mol), diethoxy oxygen phosphorus acetic acid (2.35g, 0.012mol) and DIPEA (1.68g, 0.013mol), is dissolved in tetrahydrofuran (25mL), slowly adds Enter HATU (4.94g, 0.013mol), after having added, 25 DEG C are continued stirring 5 hours.Reaction solution is poured into water (50mL), and uses second Acetoacetic ester (50mL x 2) extracts, and merges organic phase.Organic phase washed with water (50mL x 4) and semi-saturation saline solution (50mL x 4) wash, anhydrous sodium sulfate drying, be concentrated to give faint yellow solid a-2I (5g, yield 71.5%), without purifying, be directly used in The next step.M.p:113‐116℃.LCMS[M+1]+:624.4。
1HNMR(400MHz,CDCl3):δ 1.26 (t, J=7.2Hz, 6H), 2.65 (s, 3H), 2.83 (s, 6H), 3.89 (s, 3H), 3.91 (s, 3H), 4.11 (q, J=7.2Hz, 4H), 7.02 (s, 1H), 7.18 (d, J=7.2Hz, 1H), 7.22-7.28 (m, 2H), 7.54 (d, J=7.2Hz, 1H), 8.00 (br, 1H), 8.29-8.32 (m, 2H), 8.53 (s, 1H), 8.72 (s, 1H), 8.97(br,1H),9.54(s,1H)。
2nd, prepare compound Ia:By a-2I (200mg, 0.32mmol), deuterated polyformaldehyde (10mg, 0.33mmol), chlorination Lithium (20mg, 0.48mmol), potassium hydroxide (89mg, 1.6mmol) are dissolved in THF/H2In O (2mL/2mL) solution, pH controls exist 10-12, it is stirred overnight at room temperature (16h).Water (20mL) is added into reaction solution, is extracted with ethyl acetate (20mL), and use successively Water (20mL), saline solution (20mL x 2) washing.Organic phase anhydrous sodium sulfate drying, it is concentrated to give crude product (150mg), post layer Analyse (eluent:Dichloromethane:Methanol=20:1) faint yellow solid Ia (110mg, yield 68%) is separated to obtain.HPLC purity: 99.8%, M.p:100‐103℃.LCMS[M+1]+:502.5。1HNMR(400MHz,CDCl3):δ2.28(s,8H),2.71(s, 3H), 2.91 (br, 2H), 3.89 (s, 3H), 4.00 (s, 3H), 6.79 (br, 1H), 7.20 (d, J=5.2Hz, 1H), 7.24- 7.30 (m, 2H), 7.39-7.41 (m, 1H), 7.72 (s, 1H), 8.06 (dd, J=6.8Hz, J=1.6Hz, 1H), 8.38 (d, J =5.6Hz, 1H), 9.10 (s, 1H), 9.85 (s, 1H), 10.14 (br, 1H).
Embodiment 2 is from halide prepare compound a-2I:
Route A
Route B
Route A is prepared from iodo acetic acid:The method for preparing a-2I with diethoxy oxygen phosphorus acetic acid, two are replaced with iodo acetic acid Ethyoxyl oxygen phosphorus acetic acid obtains compound a -3I.LCMS[M+1]+:614。
It is prepared by route B Iodoactyl chloride:By compound a -1I (445mg, 1.0mmol) and triethylamine (303mg, 3.0mmol) it is dissolved in CH2Cl2(10mL).Iodoactyl chloride (204.4mg, 1.0mmol) is slowly added at 0 DEG C by syringe, added 2h is stirred at room temperature in compound of reaction after complete.Water (10mL) is added, mixture is extracted with EtOAc (10mL x 3), Na2SO4It is dry It is dry, boil off solvent and obtain product a-3I, the next step is directly used in without purifying.
Gained a-3I and Et3N (303mg, 3.0mmol) is dissolved in CH2Cl2(10mL), triethoxy phosphine is added at 0 DEG C (249mg,1.5mmol).24h is stirred at room temperature in reaction solution.Water (10mL) is added, mixture is extracted with EtOAc (10mL x3), Organic phase Na2SO4Dry, boil off solvent, residue is through the silica gel column chromatography (CH of 0-5% methanol2Cl2) purifying obtain chemical combination Thing a-2I.LCMS[M+1]+:624。
Comparative example 1
The synthetic route of bis- deuterated acrylic acid of 3,3- is as follows:
The chosen property of ethylene glycol (9) is protected to obtain compound 10.With usual method oxidized compound 10 generate aldehyde 11 after with The two deuterated Wittig reagent reactings generation deuterated propylene 12 of 3,3- bis-.Compound 12 through Deprotection rear oxidation compound 13, Obtain the deuterated acrylic acid 8 of 3,3- bis-.Compound 8 reacts to obtain the corresponding deuterated acrylamide I of 3,3- bis- with appropriate precursor amine. But reaction scheme is oversize, compound 11 is easily excessively oxidated into acid, and total recovery is very low, usually 3-10%.
Comparative example 2
The synthetic route of bis- deuterated acrylic acid of 3,3- is as follows:
Malonate 14 reacts generation compound 15 with deuterated formaldehyde in the presence of alkali, then through hydrolysis generation deuterated third Olefin(e) acid 8.The performance level of hydroxymethylation is difficult to control, and causes product 8 to be mixed with by-product acetic acid, it is difficult to pure Change.Reaction repeatability is bad.
In summary, the present invention has high income, purity height, technique by the intermediate a-2I methods for preparing compound of formula I Favorable repeatability etc. is a little.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this A little simple variants belong to protection scope of the present invention.

Claims (5)

1. the preparation method of deuterated acrylamide, it is characterised in that realize by the following method:
(1) in organic solvent, compound a -1 is given birth in the presence of condensing agent with diethoxy oxygen phosphorus peracetic acid temperature in 0-50 DEG C of reaction Into compound a -2, the condensing agent selects dicyclohexylcarbodiimide (DCC) class or 2- (7- aoxidizes BTA)-N, N, N', N'- tetramethylurea hexafluorophosphoric acid esters (HATU);The organic solvent is selected from aprotic solvents;
(2) in organic solvent or/and water, compound a -2 in the presence of a base, adds LiCl, deuterated with two deuterated polyformaldehyde or two Formaldehyde reacts to obtain compound I;The alkali is selected from:Potassium carbonate, sodium carbonate, sodium hydroxide, potassium hydroxide;The organic solvent choosing From aprotic solvents or alcohol;R is the group shown in i:
Each R3It independently is C1-C3Alkyl, the alkyl are substituted by deuterium.
2. the preparation method of deuterated acrylamide, it is characterised in that realize by the following method:
(1) in organic solvent, compound a -1 reacts to obtain compound a -3 in the presence of condensing agent with halogenated acetic acids;The condensation Dicyclohexylcarbodiimide (DCC) class or 2- (7- aoxidizes BTA)-N, N, N', N'- tetramethylurea hexafluorophosphoric acids are selected in agent Ester (HATU);The organic solvent is selected from aprotic solvents;
Or in organic solvent, compound a -1 reacts generation compound a -3 with haloacetyl chloride in the presence of an organic base, described Organic solvent is selected from aprotic solvents;
(2) in organic solvent, compound a -3 reacts generation compound a -2 with triethyl phosphite in the presence of an organic base, described Organic solvent is selected from aprotic solvents;
(3) in organic solvent or/and water, compound a -2 in the presence of a base, adds LiCl, deuterated with two deuterated polyformaldehyde or two Formaldehyde reacts to obtain compound I;The alkali is selected from:Potassium carbonate, sodium carbonate, sodium hydroxide, potassium hydroxide;The organic solvent choosing From aprotic solvents or alcohol;
R is the group shown in i:
Each R3It independently is C1-C3Alkyl, the alkyl are substituted by deuterium.
3. the preparation method of deuterated acrylamide as claimed in claim 1 or 2, it is characterised in that
R is the group shown in formula i-1:
4. the preparation method of deuterated acrylamide as claimed in claim 1 or 2, it is characterised in that prepared deuterated acryloyl Amine selects following compound:
5. the intermediate in the preparation method of deuterated acrylamide as described in one of claim 1-4, it is characterised in that knot Structure is as follows:
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112778379A (en) * 2019-11-07 2021-05-11 华中科技大学 Method for synthesizing deuterated compound in aqueous solvent
CN112778379B (en) * 2019-11-07 2022-10-14 华中科技大学 Method for synthesizing deuterated compound in aqueous solvent

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