HRID1908646

反应详情

EQUATION

反应方程式

HRID 1908646 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

Crude (S)-2-[(5-Hydroxy-1-phenyl-1H-pyrazole-3-carbonyl)-amino]-pentanedioic acid 5-tert-butyl ester 1-methyl ester (44 g) was dissolved in DMF and treated with 12.2 g potassium tert-butoxide and 14.7 ml 1-bromopinacolone. After 2 h the solvent was removed in vacuo, the residue taken up in DCM and extracted with water. The crude product obtained after evaporation of the solvent was purified by flash column chromatography on silica eluting with heptane/ethyl acetate giving the title compound as colorless oil (45 g).

WORKUP

后处理

  1. customAfter 2 h the solvent was removed in vacuo
  2. extractionextracted with water