HRID1721235

反应详情

EQUATION

反应方程式

HRID 1721235 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

A solution of rac.-2-[(diphenylmethylene)amino]-3-[4-[(1,1-dimethylethoxy)carbonyl]phenyl]propanoic acid benzyl ester (11.5 g, 22 mmol) and p-toluenesulfonic acid monohydrate (4.18 g, 22 mmol) in a 10/1 mixture of acetonitrile and water (640 ml) was stirred for 2 h at room temperature. Concentration provided a crude solid product which was recrystallized from ethanol-ether to give rac.-2-amino-3-[4-[(1,1-dimethylethoxy)carbonyl]phenyl]propanoic acid benzyl ester p-toluenesulfonic acid salt, (8.1 g, 15 mmol) in 67% yield, mp. 154°-157° C.

WORKUP

后处理

  1. concentrationConcentration
  2. customprovided a crude solid product which
  3. customwas recrystallized from ethanol-ether