HRID362124

反应详情

EQUATION

反应方程式

HRID 362124 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

2

PROCEDURE

实验过程

A solution of 6.8 g (6.75 mmol) of N-[N-[N-[N-[N-[3-(tert-butoxycarbonyl)propionyl]-O-tert-butyl-L-α-aspartyl]-O-tert-butyl-L-α-glutamyl]-2-methyl-L-phenylalanyl]-3-methyl-L-valyl]-L-leucine benzyl ester in 200 ml of dimethylformamide was hydrogenated over 600 mg of 10% palladium/carbon for 1 hour. The catalyst was removed by filtration and the filtrate was evaporated to give 15 g of crude product which was chromatographed on silica gel using 10-15% methanol in dichloromethane for the elution to give 6 g of N-[N-[N-[N-[N-[3-(tert-butoxycarbonyl)propionyl]-O-tert-butyl-L-α-aspartyl]-O-tert-butyl-L-α-glutamyl]-2-methyl-L-phenylalanyl]-3-methyl-L-valyl]-L-leucine as a white solid of melting point 235°-236° C.; MS: m/e 918.4 [M+H]+, m/e 940.3 [M+Na]+.

WORKUP

后处理

  1. customThe catalyst was removed by filtration
  2. customthe filtrate was evaporated
  3. customto give 15 g of crude product which
  4. customwas chromatographed on silica gel using 10-15% methanol in dichloromethane for the elution