HRID621540

反应详情

EQUATION

反应方程式

HRID 621540 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

A mixture of 8.8 g (30 mmol) of 2-[N-(4-methoxybenzyl)-N-methylamino]-ethyl acetoacetate, 8.5 g (30 mmol) of cyclopropylmethyl 2-(3-nitrobenzylidene)acetoacetate, 2.5 ml of 28% aqueous ammonia and 50 ml of ethanol was stirred at the reflux temperature for 7 hours, and then the solvent was removed under reduced pressure. The residue was chromatographed on silica gel column to afford 3-cyclopropylmethyl 5-[2-[N-(4-methoxybenzyl)-N-methylamino]ethyl] 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)pyridine-3,5-dicarboxylate (7.8 g, 46.7%) as yellow oil. Treatment of this oil with 1 equivalent of fumaric acid in ethanol gave the corresponding fumarate.

WORKUP

后处理

  1. customthe solvent was removed under reduced pressure
  2. customThe residue was chromatographed on silica gel column