HRID1973112

反应详情

EQUATION

反应方程式

HRID 1973112 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

27.9 g. of 4,6-dichloro-2-methyl-5-nitropyridine-3-carboxylic acid, ethyl ester (0.1 Mol.) are dissolved in about 100 ml. of methanol. At 50°, 9.2 g. of methylhydrazine are dropped in and the mixture is stirred for 30 minutes. On cooling, 4-chloro-6-(1-methyl)hydrazino-2-methyl-5-nitropyridine-3-carboxylic acid, ethyl ester precipitates, yield: 18 g. (62.2%), m.p. 159°-161° (methanol).

WORKUP

后处理

  1. customAt 50°
  2. temperatureOn cooling
  3. custom4-chloro-6-(1-methyl)hydrazino-2-methyl-5-nitropyridine-3-carboxylic acid, ethyl ester precipitates