CN110128298B - Synthetic method of Sacubitril intermediate - Google Patents

Synthetic method of Sacubitril intermediate Download PDF

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CN110128298B
CN110128298B CN201910511651.XA CN201910511651A CN110128298B CN 110128298 B CN110128298 B CN 110128298B CN 201910511651 A CN201910511651 A CN 201910511651A CN 110128298 B CN110128298 B CN 110128298B
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tert
alkali
bromophenyl
amino
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CN110128298A (en
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袁方
吕伏生
周步高
李守忠
张盼
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Jiangsu Litaer Pharmaceutical Co ltd
Nanjing F&s Pharmatech Co ltd
Nanjing Yixinhe Pharmaceutical Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C269/00Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
    • C07C269/06Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups by reactions not involving the formation of carbamate groups

Abstract

The invention discloses a synthesis method of a Sacubibara intermediate, which takes 2- (N-tert-butoxy) amino-3- (4-bromophenyl) propionaldehyde and phenylboronic acid as reaction raw materials, and takes an organic solvent as a reaction solvent to carry out reaction under the action of alkali and a catalyst to obtain the intermediate. The method can obtain the SacuBaqu intermediate with high yield through the combined reaction of a proper catalyst, alkali and solvent, and meanwhile, the reaction raw materials are cheap and easy to obtain, the operation is simple, the reaction condition is mild and easy to control, the production cost is low, the reaction steps are short, the process is reliable, the subsequent treatment is very convenient, and the method is suitable for industrial large-scale production.

Description

Synthetic method of Sacubitril intermediate
Technical Field
The invention relates to the technical field of medicine synthesis, in particular to a synthetic method of a Sacubitril intermediate.
Background
Sacubitril (Sacubitril), an enkephalinase inhibitor developed by Noval, Switzerland, the trisodium hemipentahydrate Entresto formed with the angiotensin II receptor inhibitor valsartan, was first approved by the FDA for marketing in 2015 for the first time in 7 months, and is clinically used for the treatment of chronic heart failure of grade II-IV and with a reduced ejection fraction.
The method for synthesizing the Sacubitril serving as an important raw material of Entresto and the preparation of an intermediate are reported, wherein the intermediate (I) is one of common synthetic intermediates, and the structural formula of the intermediate is as follows:
Figure GDA0002957479050000011
two references were found in the literature for the synthesis of this intermediate (I). The intermediate (I) is obtained by 5 steps of reaction from methyl 2- (N-tert-butoxycarbonylamino) -3- (4-hydroxy) phenylpropionate reported in J.Med.chem.1995,38,1689-1700 (shown in the following formula). The method has the advantages of long reaction steps, complex operation and complex post-treatment, and the method needs to pass through the trifluoromethanesulfonate compound with genetic toxicity impurities.
Figure GDA0002957479050000012
Secondly, the intermediate (I) is obtained by directly carrying out a Tempo oxidation reaction on a biphenyl hydroxyl compound (shown as the following formula) reported in a document CN 101516831B. Although the method is simple, the used raw material biphenyl hydroxy compound is not easy to obtain, and industrial production is difficult to realize.
Figure GDA0002957479050000021
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a synthetic method of a Sacubitril intermediate, compared with the prior art, the method can obtain the Sacubitril intermediate at high yield through the combined reaction of a proper catalyst, alkali and a solvent, and solves the problems of complexity, difficult raw material acquisition and difficult realization of industrial production of the existing preparation method.
The technical scheme is as follows: the invention relates to a synthesis method of a Sacubibara intermediate, which takes 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propionaldehyde and phenylboronic acid as reaction raw materials, takes an organic solvent as a reaction solvent under the action of alkali and a catalyst, and carries out reaction to obtain an intermediate (I), and the intermediate (I) is represented by the following reaction formula:
Figure GDA0002957479050000022
further, the molar ratio of the phenylboronic acid to the 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal is 1.1-1.5: 1.
Furthermore, the molar ratio of the catalyst to the 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal is 0.02-0.05: 1.
Further, the catalyst is tetrakis (triphenylphosphine) palladium or palladium acetate.
Further, the molar ratio of the base to the 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal is 1-2: 1.
Further, the base is an alkali metal carbonate.
Further, the alkali is sodium carbonate or potassium carbonate.
Further, the organic solvent is DMF, DMA or DMSO.
Further, the synthesis method is carried out at the reflux temperature of the organic solvent.
Has the advantages that: the synthesis method provides a new idea for synthesizing the intermediate of the Shakubaqu, and the intermediate of the Shakubaqu can be obtained at high yield by reacting at a reflux temperature through the combination of a proper catalyst, alkali and a solvent without harsh reaction conditions; meanwhile, the reaction raw materials are nontoxic, cheap and easy to obtain, the operation is simple, the reaction conditions are mild and easy to control, the production cost is low, the reaction steps are short, the process is reliable, the subsequent treatment is very convenient, and the method is suitable for industrial large-scale production.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention is further described below with reference to examples:
example 1
Adding 1mol of 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal, 0.02mol of tetrakis (triphenylphosphine) palladium, 20mL of DMF and 40mL of sodium carbonate aqueous solution (2mol of sodium carbonate dissolved in 40mL of water) into a 100mL three-necked flask, and adding 1.1mol of phenylboronic acid while stirring to obtain a mixture solution;
and then heating the mixture solution to generate reflux reaction, cooling the mixture solution to room temperature after the reaction is finished, quenching redundant phenylboronic acid by using hydrogen peroxide, adding methyl tert-butyl ether for extraction, washing an organic phase by using a saturated sodium chloride solution, drying by using anhydrous sodium sulfate, and concentrating to obtain an intermediate, wherein the yield can reach 89%.
Example 2
Adding 1mol of 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal, 0.05mol of tetrakis (triphenylphosphine) palladium, 50mL of DMA (methyl methacrylate) and 20mL of potassium carbonate aqueous solution (1mol of potassium carbonate is dissolved in 20mL of water) into a 200mL three-necked bottle, and adding 1.5mol of phenylboronic acid while stirring to obtain a mixture solution;
and then heating the mixture solution to generate reflux reaction, cooling the mixture solution to room temperature after the reaction is finished, quenching redundant phenylboronic acid by using hydrogen peroxide, adding methyl tert-butyl ether for extraction, washing an organic phase by using a saturated sodium chloride solution, drying by using anhydrous sodium sulfate, and concentrating to obtain an intermediate, wherein the yield can reach 93%.
Example 3
Adding 1mol of 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal, 0.03mol of palladium acetate, 30mL of DMSO and 40mL of potassium carbonate aqueous solution (2mol of potassium carbonate is dissolved in 40mL of water) into a 200mL three-necked bottle, and adding 1.3mol of phenylboronic acid while stirring to obtain a mixture solution;
and then heating the mixture solution to generate reflux reaction, cooling the mixture solution to room temperature after the reaction is finished, quenching redundant phenylboronic acid by using hydrogen peroxide, adding methyl tert-butyl ether for extraction, washing an organic phase by using a saturated sodium chloride solution, drying by using anhydrous sodium sulfate, and concentrating to obtain an intermediate, wherein the yield can reach 90%.

Claims (4)

1. A synthetic method of a Sacubitril intermediate is characterized by comprising the following steps: taking 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal and phenylboronic acid as reaction raw materials, reacting under the action of alkali and a catalyst and an organic solvent as a reaction solvent to obtain an intermediate (I), wherein the reaction formula is as follows:
Figure FDA0002957479040000011
the molar ratio of the phenylboronic acid to the 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal is 1.1-1.5: 1;
the molar ratio of the catalyst to the 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal is 0.02-0.05: 1;
the catalyst is tetrakis (triphenylphosphine) palladium or palladium acetate;
the molar ratio of the alkali to 2- (N-tert-butoxycarbonyl) amino-3- (4-bromophenyl) propanal is 1-2: 1;
the base is an alkali metal carbonate.
2. The method for synthesizing the Sacubitril intermediate according to claim 1, characterized in that: the alkali is sodium carbonate or potassium carbonate.
3. The method for synthesizing the Sacubitril intermediate according to claim 1, characterized in that: the organic solvent is DMF, DMA or DMSO.
4. The method for synthesizing the Sacubitril intermediate according to claim 1, characterized in that: the synthesis process is carried out at the reflux temperature of the organic solvent.
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CN101516831A (en) * 2006-09-13 2009-08-26 诺瓦提斯公司 Process for preparing biaryl substituted 4-amino-butyric acid or derivatives thereof and their use in the production of NEP inhibitors
CN102010287A (en) * 2010-10-20 2011-04-13 石家庄诚志永华显示材料有限公司 Method for synthesizing (trans)-4-alkyl-3-alkene biphenyl derivative monomer liquid crystals
CN106397273A (en) * 2015-07-31 2017-02-15 四川海思科制药有限公司 Improved preparation method of sacubitril intermediate
CN106588698A (en) * 2016-11-18 2017-04-26 凯瑞斯德生化(苏州)有限公司 Preparation method of N-Boc biphenyl alaninal
WO2017152755A1 (en) * 2016-03-10 2017-09-14 深圳市塔吉瑞生物医药有限公司 Substituted biphenyl compound and pharmaceutical composition thereof
CN108675943A (en) * 2018-06-13 2018-10-19 常州亚邦制药有限公司 The preparation method of one planting sand library Ba Qu key intermediates

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US5354892A (en) * 1992-01-22 1994-10-11 Ciba-Geigy Corporation Biaryl substituted 4-amino-butyric acid amides
CN101516831A (en) * 2006-09-13 2009-08-26 诺瓦提斯公司 Process for preparing biaryl substituted 4-amino-butyric acid or derivatives thereof and their use in the production of NEP inhibitors
CN102010287A (en) * 2010-10-20 2011-04-13 石家庄诚志永华显示材料有限公司 Method for synthesizing (trans)-4-alkyl-3-alkene biphenyl derivative monomer liquid crystals
CN106397273A (en) * 2015-07-31 2017-02-15 四川海思科制药有限公司 Improved preparation method of sacubitril intermediate
WO2017152755A1 (en) * 2016-03-10 2017-09-14 深圳市塔吉瑞生物医药有限公司 Substituted biphenyl compound and pharmaceutical composition thereof
CN106588698A (en) * 2016-11-18 2017-04-26 凯瑞斯德生化(苏州)有限公司 Preparation method of N-Boc biphenyl alaninal
CN108675943A (en) * 2018-06-13 2018-10-19 常州亚邦制药有限公司 The preparation method of one planting sand library Ba Qu key intermediates

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