CN113444052A - Synthesis of gefitinib - Google Patents

Synthesis of gefitinib Download PDF

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Publication number
CN113444052A
CN113444052A CN202110746765.XA CN202110746765A CN113444052A CN 113444052 A CN113444052 A CN 113444052A CN 202110746765 A CN202110746765 A CN 202110746765A CN 113444052 A CN113444052 A CN 113444052A
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oxalyldiamine
reaction
bis
gefitinib
methoxy
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杨晓瑜
方显杰
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Haimen Baikang Pharmaceutical Co ltd
Jiangsu Junruo Pharmaceutical Co ltd
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Haimen Baikang Pharmaceutical Co ltd
Jiangsu Junruo Pharmaceutical Co ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D239/00Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/70Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
    • C07D239/72Quinazolines; Hydrogenated quinazolines
    • C07D239/86Quinazolines; Hydrogenated quinazolines with hetero atoms directly attached in position 4
    • C07D239/94Nitrogen atoms

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

The invention relates to preparation of gefitinib. In particular to a method for preparing gefitinib by reacting 3-morpholine propane-1-alcohol (formula I) with 6-halogeno-N- (4-chloro-2-fluorophenyl) -7-methoxyquinazoline-4-amine (formula II) under the conditions of a copper reagent/alkali/additive/solvent.

Description

Synthesis of gefitinib
Technical Field
The invention belongs to the field of chemical synthesis, and particularly relates to gefitinib synthesis.
Background
Gefitinib, a novel antitumor drug developed by eastern astrazen pharmaceutical company, is a small molecule inhibitor against EGFR protein tyrosine kinase and is first marketed in japan in 2002. The drug is approved to be sold in China (trade name: Iressa) formally by the national food and drug administration (NMPA) in 2005 and is used for first-line administration for treating the non-small cell lung cancer which is not suitable for chemotherapy in locally advanced stage or metastatic stage. Research shows that gefitinib can inhibit the growth of human tumor cell transplanted to nude mouse strongly, increase apoptosis of human tumor cell derivative line, and improve antitumor activity of chemotherapy, radiotherapy and hormone therapy.
The chemical name of gefitinib is N- (3-chloro-4-fluorophenyl) -7-methoxy-6- (3-morpholinopropoxy) quinazoline-4-amine, and the chemical structural formula is as follows:
Figure BDA0003142687570000011
the synthetic route reported for gefitinib mainly involves the splicing of several fragments. The synthesis of gefitinib is described in the patents EP0566226/WO199633980/WO 199742187. The route takes 6, 7-dimethoxy quinazoline-4 (3H) -ketone as a raw material, and the raw material reacts with methanesulfonic acid to remove methyl to obtain 6-hydroxy-7-methoxy quinazoline-4 (3H) -ketone; the 6-hydroxy-7-methoxy quinazoline-4 (3H) -ketone takes pyridine as a solvent, and when the pyridine reacts with acetic anhydride, 6-hydroxy is protected by acetic anhydride to obtain 7-methoxy-6-acetoxy quinazoline-4 (3H) -ketone; then, in a polar aprotic DMF solvent, reacting 7-methoxy-6-acetoxy quinazoline-4 (3H) -ketone with thionyl chloride, and chlorinating the hydroxyl at the 4 th position to obtain 7-methoxy-6-acetoxy-4-chloroquinazoline; reacting 7-methoxy-6-acetoxyl-4-chloroquinazoline with 3-chloro-4-fluoroaniline to obtain N- (3-chloro-4-fluorophenyl) -7-methoxy-6-acetoxyl quinazoline-4-amine; then, removing the hydroxyl protecting group acetyl from the N- (3-chloro-4-fluorophenyl) -7-methoxyl-6-acetoxy quinazoline-4-amine to obtain N- (3-chloro-4-fluorophenyl) -6-hydroxyl-7-methoxyl quinazoline-4-amine; and finally, carrying out alkoxylation reaction on a 6-site side chain in the N- (3-chloro-4-fluorophenyl) -6-hydroxy-7-methoxyquinazoline-4-amine to obtain the gefitinib. The relevant synthetic route is as follows:
Figure BDA0003142687570000021
patent W02008125867 describes another synthetic route to gefitinib. The method specifically comprises the following steps: 4-methoxy-3-hydroxybenzaldehyde reacts with 3-morpholine propyl chloride to prepare 4-methoxy-3- (3-morpholine propoxy) benzaldehyde; 4-methoxy-3- (3-morpholine propoxy) benzaldehyde is subjected to mixed acid nitration to prepare 6-nitro-4-methoxy-3- (3-morpholine propoxy) benzaldehyde; 6-nitro-4-methoxy-3- (3-morpholine propoxy) benzaldehyde reacts with formic acid, sodium formate and hydroxylamine sulfate to be condensed to prepare 6-nitro-4-methoxy-3- (3-morpholine propoxy) benzonitrile; reacting 6-nitro-4-methoxy-3- (3-morpholine propoxy) benzonitrile in a dimethyl sulfoxide solvent under the action of alkaline hydrogen peroxide to generate 6-nitro-4-methoxy-3- (3-morpholine propoxy) benzamide; reducing 6-nitro-4-methoxy-3- (3-morpholine propoxy) benzamide into 6-amino-4-methoxy-3- (3-morpholine propoxy) benzamide by using alkaline sodium thiosulfate; condensing 6-amino-4-methoxy-3- (3-morpholine propoxy) benzamide and formamide to form a ring to obtain 7-methoxy-6- (3-morpholine propoxy) quinazoline-4 (3H) -ketone; and finally, carrying out thionyl chloride chlorination and 3-chloro-4-fluoroaniline amination reaction on 7-methoxy-6- (3-morpholinopropoxy) quinazoline-4 (3H) -ketone to prepare the gefitinib. The relevant synthetic route is as follows:
Figure BDA0003142687570000031
the patents CN1300118, CN101148439, CN101402610, etc. also report the preparation of gefitinib. The strategy of these preparation methods is to install fragments of gefitinib through different stages and in different sequences.
Disclosure of Invention
The invention aims to provide a method for preparing gefitinib, aiming at avoiding the synthetic route reported at present.
The synthetic route of the invention is as follows:
Figure BDA0003142687570000032
the reaction is specifically that 3-morpholine propane-1-alcohol (formula I) reacts with 6-halogeno-N- (4-chloro-2-fluorophenyl) -7-methoxy quinazoline-4-amine (formula II) under the condition of copper reagent/alkali/additive/solvent to prepare gefitinib.
X in the formula II is Br and I.
The copper reagent used in the reaction is Cu (OAc)2,CuI,CuBr,Cu2O,Cu(acac)2
The base used in the reaction istBuONa,K3PO4,tBuOK,。
The additive used in the reaction is oxalyl diamine compound, including L-proline, N1,N2Bis (2,4, 6-trimethoxyphenyl) oxalyldiamine, N1,N2Bis (2-phenyl-4-methylphenyl) oxalyldiamine, N1- (1-naphthyl) -N2Alkyl oxalyldiamines, N1-benzyl-N2- (5-methyl- [1,1' -biphenyl)]-2-yl) oxalyldiamine, N1,N2Bis (phenylethyl) oxalyldiamine, N1,N2-bis ([1,1' -biphenyl)]-2-diyl) oxalylDiamine, N1-benzyl-N2- ([1,1' -Biphenyl)]-2-yl) oxalyldiamine, N1,N2Bis (naphthalen-1-ylmethyl) oxalyldiamine, N1,N2Bis (benzyl) oxalyldiamine.
The solvent used in the reaction is tert-butyl alcohol, DMSO, 1, 4-dioxane, acetonitrile and DMF.
The method of the invention can simply and conveniently realize the preparation of gefitinib, and the reaction process does not involve the use of control reagents with high toxicity risks.
Detailed Description
The following exemplary embodiments are provided to illustrate the present invention, and simple replacement and modification of the present invention by those skilled in the art are within the technical scheme of the present invention.
EXAMPLE I preparation of Gefitinib
Figure BDA0003142687570000041
6-bromo-N- (3-chloro-4-fluorophenyl) -7-methoxyquinazolin-4-amine (38.3g,0.10mol), 3-morpholinopropan-1-ol (17.4g,0.12mol), CuI (955mg,5.0mmol), K3PO4(31.8g,0.15mol) and N1,N2Bis (naphthalen-1-ylmethyl) oxalyldiamine (3.70g,10mmol) was added to a reaction flask, nitrogen gas was replaced three times, anhydrous DMSO (150mL) was added to the reaction flask, and the reaction was heated to 95 ℃ with stirring and reacted for 24 hours. After the reaction is finished, the system is naturally cooled to room temperature. The system was diluted with ethyl acetate (100mL) and filtered through celite. The filtrate was desolventized under reduced pressure to remove the organic solvent. Adding ethanol (1.2L) into the residue, heating to 75-80 deg.C, refluxing, filtering while hot, rapidly cooling the filtrate to 0 deg.C, maintaining the temperature, stirring, crystallizing for 2 hr, filtering, and drying the filter cake in 55 deg.C air-blast drying oven to obtain white crystalline powder (37.9g, 85%).1H NMR(300MHz,DMSO-D6)δ2.00(m,2H),2.39(s,4H),2.48(d,J=3.0Hz,2H),3.58(t,J=3.3Hz,4H),3.94(s,3H),4.18(t,J=3.0Hz,2H),7.20(s,1H),7.44(t,J=6.9Hz,1H),7.78(m,1H),8.12(dd,J=1.8,5.1Hz,1H),8.50(s,1H),9.56(s,1H)。Mass:447[M+H]+
EXAMPLE II preparation of Gefitinib
Figure BDA0003142687570000051
Coupling 6-bromo-N- (3-chloro-4-fluorophenyl) -7-methoxyquinazolin-4-amine (19.2g,0.05mol), 3-morpholinopropan-1-ol (8.7g,0.06mol), Cu (OAc)2(455mg,2.5mmol), sodium tert-butoxide (7.2g,0.075mol) and N1,N2Bis (phenylethyl) oxalyl diamine (1.48g,5mmol) was added to a reaction flask, nitrogen was replaced three times, anhydrous DMF (100mL) was added to the reaction flask, and the reaction was heated to 100 ℃ with stirring and reacted overnight. After the reaction is finished, the system is naturally cooled to room temperature. The system was diluted with ethyl acetate (100mL) and filtered through celite. The filtrate was desolventized under reduced pressure to remove the organic solvent. Adding ethanol (500mL) into the residue, heating to 75-80 deg.C, refluxing, filtering while hot, rapidly cooling the filtrate to 0 deg.C, maintaining the temperature, stirring, crystallizing, filtering, and drying the filter cake in 55 deg.C air-blast drying oven to obtain white crystalline powder (17.5g, 78.3%).

Claims (6)

1. The method for preparing the gefitinib is characterized in that 3-morpholine propane-1-alcohol (shown in a formula I) reacts with 6-halogenated-N- (4-chloro-2-fluorophenyl) -7-methoxyquinazoline-4-amine (shown in a formula II) under the condition of a copper reagent/alkali/additive/solvent to prepare the gefitinib. The reaction formula is as follows:
Figure FDA0003142687560000011
2. the reaction of claim 1, wherein the copper reagent used is Cu (OAc)2,CuI,CuBr,Cu2O,Cu(acac)2
3. The reaction of claim 1, wherein the base used istBuONa,K3PO4,tBuOK。
4. The reaction according to claim 1, wherein the additive used is L-proline, N1,N2Bis (2,4, 6-trimethoxyphenyl) oxalyldiamine, N1,N2Bis (2-phenyl-4-methylphenyl) oxalyldiamine, N1- (1-naphthyl) -N2Alkyl oxalyldiamines, N1-benzyl-N2- (5-methyl- [1,1' -biphenyl)]-2-yl) oxalyldiamine, N1,N2Bis (phenylethyl) oxalyldiamine, N1,N2-bis ([1,1' -biphenyl)]2-diyl) oxalyldiamine, N1-benzyl-N2- ([1,1' -Biphenyl)]-2-yl) oxalyldiamine, N1,N2Bis (naphthalen-1-ylmethyl) oxalyldiamine, N1,N2Bis (benzyl) oxalyldiamine.
5. The reaction according to claim 1, wherein the solvent used in the reaction is selected from the group consisting of t-butanol, DMSO, 1, 4-dioxane, acetonitrile, and DMF.
6. The compound as claimed in claim 1, wherein X is Br, I.
CN202110746765.XA 2021-07-01 2021-07-01 Synthesis of gefitinib Pending CN113444052A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101535279A (en) * 2006-09-11 2009-09-16 柯瑞斯公司 Quinazoline based EGFR inhibitors containing a zinc binding moiety
CN101641338A (en) * 2006-09-11 2010-02-03 柯瑞斯公司 Multi-functional small molecules as anti-proliferative agents
CN102153518A (en) * 2010-02-11 2011-08-17 江苏德芳医药科研有限公司 Preparation method of Gefitinib
CN111763215A (en) * 2020-07-21 2020-10-13 成都海博为药业有限公司 Compound with nitrogen-containing heterocyclic structure and preparation method and application thereof
CN112566906A (en) * 2018-07-26 2021-03-26 多曼治疗学公司 Substituted quinazolinone derivatives and their use as positive allosteric modulators of MGLUR4

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101535279A (en) * 2006-09-11 2009-09-16 柯瑞斯公司 Quinazoline based EGFR inhibitors containing a zinc binding moiety
CN101641338A (en) * 2006-09-11 2010-02-03 柯瑞斯公司 Multi-functional small molecules as anti-proliferative agents
CN102153518A (en) * 2010-02-11 2011-08-17 江苏德芳医药科研有限公司 Preparation method of Gefitinib
CN112566906A (en) * 2018-07-26 2021-03-26 多曼治疗学公司 Substituted quinazolinone derivatives and their use as positive allosteric modulators of MGLUR4
CN111763215A (en) * 2020-07-21 2020-10-13 成都海博为药业有限公司 Compound with nitrogen-containing heterocyclic structure and preparation method and application thereof

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