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Anidulafungin side chain intermediate 4''-(pentyloxy)-[1,1':4',1''-terphenyl]-4-carboxylic acid

A technology of p-pentoxy terphenyl formic acid and n-pentyloxy biphenyl is applied in the field of preparation of p-pentyloxy terphenyl acid in the side chain of anidungin, and can solve the problems of complicated operation, difficult control and high risk. , to achieve the effect of simple and safe process operation and low cost

Active Publication Date: 2019-04-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of cumbersome operation, difficult control and high risk in the method for preparing boric acid by reacting butyllithium or Grignard reagent in the prior art, and provide a kind of anifungin side chain intermediate p-amyloxy The preparation method of terphenylformic acid

Method used

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  • Anidulafungin side chain intermediate 4''-(pentyloxy)-[1,1':4',1''-terphenyl]-4-carboxylic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Example 1 Synthesis of 4'-bromo-4-n-pentoxybiphenyl

[0076] Add 1450mL of water and 21.2g of sodium hydroxide to a 2L three-necked flask, stir to dissolve, add 120g of 4-hydroxy-4'-bromobiphenyl and 6g of tetrabutylammonium bromide, stir at room temperature for 10min, then add 87.2g dropwise 1-Bromopentane, reflux for 5 hours after the dropwise addition, and filter with suction after the reaction has dropped to room temperature. After filtering and washing the filter cake with 60 mL of n-heptane, the obtained solid was vacuum-dried at 60° C. for 5 hours, and the yield was 87%. 1 HNMR(d 6 DMSO,400MHz)δ8.04-8.02(m,2H),7.85-7.83(m,1H),7.63-7.57(m,3H),7.02-7.00(m,2H),4.01-3.98(m,2H) ,1.75(t,J=8.0Hz,2H),1.41-1.36(m,4H),0.92-0.89(m,3H).

Embodiment 2

[0077] Example 2 Synthesis of 4'-bromo-4-n-pentoxybiphenyl Add 1200mL of water and 17.7g of sodium hydroxide to a 2L three-necked flask, stir to dissolve and add 100g of 4-hydroxy-4'-bromobiphenyl and 5g of tetrabutylammonium bromide, stirred at room temperature for 10min, then added dropwise 72.7g of 1-bromopentane, refluxed for 5h after the dropwise addition, and suction filtered after the reaction was lowered to room temperature, and the filter cake was washed with 300mL of water, and the solid Heat slurry with 320mL n-heptane / water (1:1) mixed solution, filter with suction and wash the filter cake with 60mL n-heptane, and dry the obtained solid under vacuum at 60°C for 5 hours, with a yield of 87%. 1 H NMR (d 6 DMSO,400MHz)δ8.04-8.02(m,2H),7.85-7.83(m,1H),7.63-7.57(m,3H),7.02-7.00(m,2H),4.01-3.98(m,2H) ,1.75(t,J=8.0Hz,2H),1.41-1.36(m,4H),0.92-0.89(m,3H).

Embodiment 3

[0078] Example 3 Synthesis of 4-pentyloxy-4'-biphenylboronic acid Under nitrogen protection, add 5g of 4'-bromo-4-n-pentyloxybiphenyl, 88mg of palladium acetate, and 4.6g of potassium acetate into a 100mL three-necked flask , 144mg of tris(o-methylphenyl)phosphine and 15mL of tetrahydrofuran, cooled to 0-10°C in an ice-water bath, 1.84g of tetrahydroxydiboron dissolved in 10mL of methanol and added dropwise to the reaction, and the reaction was stirred at room temperature until the raw materials disappeared Add 30mL of ethanol to dilute, filter with suction, wash the filter cake with 10mL of ethanol, spin the filtrate, add 80mL of dichloromethane / water mixed solvent (1:1) for beating at 40°C for 1h, cool to room temperature and filter with suction, filter the cake Washed with 5 mL of water and 5 mL of dichloromethane successively, and dried under vacuum at 50° C. to obtain 2.84 g of a white solid with a yield of 64%. 1 H NMR (d 6 DMSO,400MHz)δ7.98-7.96(m,2H),7.85-7.83(m,2H),7...

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Abstract

The invention relates to the preparation method of anidulafungin side chain intermediate 4''-(pentyloxy)-[1,1':4',1''-terphenyl]-4-carboxylic acid. The preparation method includes the steps of S1, subjecting 4 hydroxy-4'-bromobiphenyl and 1-bromopentane to nucleophilic substitution to obtain 4'-bromo-4-n-amyloxybiphenyl; S2, subjecting the 4'-bromo-4-n-amyloxybiphenyl and tetrahydroxydiboron to Suzuki coupling reaction to obtain 4-pentyloxy-4'-biphenylboronic acid; S3, subjecting the 4-pentyloxy-4'-biphenylboronic acid and methyl 4-iodobenzoate to Suzuki coupling reaction to obtain methyl 4''-(pentyloxy)-[1,1',4'-1''-terphenyl]-4-formate; S4, hydrolyzing to obtain 4''-(pentyloxy)-[1,1':4',1''-terphenyl]-4-carboxylic acid. arylboronic acid is prepared through Suzuki coupling; the target product is then prepared through Suzuki coupling and alkali hydrolysis; the preparation method has the advantages of low cost and good process operation simplicity and safety.

Description

technical field [0001] The invention relates to the field of pharmaceutical synthesis, more specifically, to a preparation method of anidifungin side chain p-amyloxy terbenzoic acid. technical background [0002] Anidulafungin (anidulafungin) is a derivative of amphotericin B, which is a third-generation echinomycin semi-synthetic antifungal drug developed by Vicuron Pharmaceutical Company of the United States, with a trade name of Eraxis, which was obtained in the United States in 2006. Listed in batches. Anidifungin has a larger volume of distribution and a broader spectrum of antibacterial activity than other echinocandin antifungals. [0003] Anifungin is a semi-synthetic antifungal agent derived from cyclic peptide antifungal agents prepared by culturing various microorganisms. All of these antifungal agents are structurally characterized by the inclusion of a cyclic hexapeptide core with an amino group of the cyclic amino acid carrying a fatty acyl group forming a ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/16C07C43/225C07F5/02C07C67/343C07C27/02C07C69/76C07C51/09C07C65/24
CPCC07C41/16C07C51/09C07C67/343C07F5/025C07C43/225C07C69/76C07C65/24
Inventor 钱宇刘毅胡文浩
Owner SUN YAT SEN UNIV
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