HRID2304327

反应详情

EQUATION

反应方程式

HRID 2304327 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

2

PROCEDURE

实验过程

A mixture of (L)-proline benzyl ester hydrochloride (0.49 g), N-Ethoxycarbonylmethyl-N-tert.-butoxycarbonyl-2-(R)-amino-3-(4-methoxyphenyl)-propionic acid (0.760 g), N-methyl morpholine (0.93 mL) and 0.65 g of 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetra-fluoroborate (TBTU) in 10 mL of dry N,N-dimethyl formamide was stirred for 16 h at ambient temperature. The volatiles were pumped off and water was added followed by extraction with ethyl acetate and concentration of the organic layer., The remaining residue was purified by silica chromatography (isohexane/ethyl acetate 1/2). Yield: 0.99 g (86%); colorless oil; (+)-APCI-MS: 569 (MH+).

WORKUP

后处理

  1. extractionfollowed by extraction with ethyl acetate and concentration of the organic layer
  2. custom, The remaining residue was purified by silica chromatography (isohexane/ethyl acetate 1/2)