Intermediate for preparing N-cyclopropyl-(2S, 3S)-3-amino-2-hydroxy caproamide, preparation method and applications thereof

A technology of hydroxycaproylamide and cyclopropyl, which is applied in the field of medicinal chemistry, can solve problems such as non-industrialized production routes, failure to meet safety and environmental protection requirements, and unstable product quality control, and achieve simple preparation process, high yield, and low raw material price. cheap effect

Inactive Publication Date: 2015-08-26
SHANGHAI DESANO CHEM PHARMA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In this route, the highly toxic mesylate is used for methyl esterification, which does not meet the requirements of safety and environmental protection; and experiments have found that there will...

Method used

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  • Intermediate for preparing N-cyclopropyl-(2S, 3S)-3-amino-2-hydroxy caproamide, preparation method and applications thereof
  • Intermediate for preparing N-cyclopropyl-(2S, 3S)-3-amino-2-hydroxy caproamide, preparation method and applications thereof
  • Intermediate for preparing N-cyclopropyl-(2S, 3S)-3-amino-2-hydroxy caproamide, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: preparation formula I compound

[0041]

[0042] Dissolve the compound of formula II (20.0 g, 0.15 mol) in 100 mL of acetonitrile, and slowly add boron trifluoride ether (28.0 g, 0.20 mol) dropwise under ice bath. to room temperature, stirred until the compound of formula II reacted completely (about 6 hours); under ice bath, slowly added saturated aqueous sodium bicarbonate solution to adjust the pH value to 5-6; concentrated under reduced pressure at 45-50°C, and concentrated The residue was extracted three times with dichloromethane (120 mL×3), the organic phase was collected, concentrated under reduced pressure, and the concentrated residue was subjected to column chromatography to obtain 20.3 g of the compound of formula I with a molar yield of 77.2%.

[0043] 1 H NMR (DMSO-d 6 300MHz)δ11.01(br s,1H),4.40(d,J=6.3Hz,1H),4.12(dd,J=6.9,6.3Hz,1H),1.33-1.41(m,4H),1.16(s ,3H),0.91(t,J=7.2Hz,3H);

[0044] MS(ESI): m / z=172.1[M+H] + , 170.1 [M-H].

Embodiment 2

[0045] Embodiment 2: preparation formula III compound

[0046]

[0047] Add 20.3g of the compound of formula I into 80mL of a mixed solvent formed by concentrated hydrochloric acid and water at a volume ratio of V / V=1 / 1, heat to reflux, and reflux until the compound of formula I reacts completely (about 4 hours); concentrate the reaction solution , stripped twice with ethanol (40mL×2) to obtain the mixed compound of formula III (light yellow liquid, the ratio of (S,S)-configuration to (R,R)-configuration determined by HPLC is 89:11) 15.7g, the molar yield is 90.1%.

[0048] MS(ESI): m / z=148.1[M+H] + , 146.1[M-H] - .

Embodiment 3

[0049] Embodiment 3: preparation formula IV compound

[0050]

[0051]Sodium carbonate (6.9g, 0.065mol) and the mixed compound of formula III (8.0g, 0.054mol) were dissolved in 80mL of a mixed solvent formed by acetonitrile and water by volume ratio V / V=1 / 1, stirred at room temperature , add dicarbonyl di-tert-butyl ester (14.2g, 0.065mol) in batches, after the addition is complete, stir the reaction at room temperature until the reaction of the compound of formula III is complete (about 6 hours); filter with suction, and wash the filter cake with acetonitrile for two (8mL×2), the filtrate was concentrated under reduced pressure; under ice bath, slowly add glacial acetic acid dropwise to the concentrate to adjust the pH value to 5-6; After filtration, the filter cake was washed twice with water (8 mL×2), and dried to obtain 12.1 g of the compound of formula IV as a white solid, with a molar yield of 90.0%.

[0052] MS(ESI): m / z=248.1[M+H] + , 246.1[M-H] - .

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Abstract

The present invention discloses an intermediate for preparing N-cyclopropyl-(2S, 3S)-3-amino-2-hydroxy caproamide, a preparation method and applications thereof, wherein the intermediate has a chemical structure general formula represented by a formula I, R is a C1-C4 alkyl or aryl substituted C1-C4 alkyl, and 3-propyl ethylene oxide-2-formic acid and alkyl nitrile or aryl nitrile react in the presence of a Lewis acid so as to prepare the intermediate. With application of the intermediate of the present invention to prepare N-cyclopropyl-(2S, 3S)-3-amino-2-hydroxy caproamide, advantages of high yield, simple process, no requirement of any toxic reagents and special equipment, cheap and easily-available raw materials and the like are provided, the chiral purity of the obtained target product is greater than 99%, and the method is suitable for large-scale production and has industrial application values.

Description

technical field [0001] The invention relates to an intermediate used for preparing N-cyclopropyl-(2S,3S)-3-amino-2-hydroxyhexanamide, a preparation method and application thereof, and belongs to the technical field of medicinal chemistry. Background technique [0002] N-cyclopropyl-(2S,3S)-3-amino-2-hydroxyhexanamide is an important intermediate in chemical synthesis, which can be further reacted to generate 3-amino-2-ketoamide. Many novel protease inhibitors contain 3-amino-2-ketoamides as C-terminal units. For example: it is an important intermediate in the synthesis of telaprevir (VX-950). [0003] Telaprevir (VX-950) is a new drug developed by Vertex Pharmaceuticals of the United States for the treatment of hepatitis C. It was approved by the FDA on May 23, 2011, and its trade name is Incivek. The drug is an oral tablet, which is a reversible protease inhibitor, used in combination with peginterferon-alpha and ribavirin, can effectively inhibit the replication of HVC v...

Claims

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Application Information

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IPC IPC(8): C07D263/16C07C237/06C07C231/12
CPCY02P20/55C07D263/16C07C227/00C07C231/12C07C231/20C07C269/04C07C269/06C07C2601/02
Inventor 李金亮赵楠华嗣恺
Owner SHANGHAI DESANO CHEM PHARMA
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