Ethyl hydrazinecarboxylate diethyl carbonate

Diaminobiuret has been prepared only from N-tricarboxylic ester and hydrazine hydrate.1 Ethyl hydrazinecarboxylate has been prepared by reduction of nitrourethan electrolytically2 or with zinc dust and acetic acid,3 and by the action of hydrazine hydrate on diethyl carbonate,4 6 ethyl chlorocarbonate,6 and N-tricarboxylic ester.1... 

Diethyl carbonate, with hydrazine hydrate to give ethyl hydrazinecarboxylate, 51,... 

Ethyl hydrazinecarboxylate, from hydrazine hydrate and diethyl carbonate, 51, 121 Ethyl 1-hydroxycyclohexylace-tate, 53, 67... 

Ethyl diazoacetate, as source of car-bethoxycarbene, 50, 94 Ethylene, with p-methoxyphenyl-acetyl chloride and aluminum chloride to give 6-methoxy- 3-tetralone, 51,109 Ethyl hydrazinecarboxylate, from hydrazine hydrate and diethyl carbonate, 51,121 Ethylidenecyclohexylamine, 50,66 Ethyl 1-iodopropionate, from ethyl... 

A. Ethyl hydrazinecarboxylate. To 100 g. (97 ml., 2.0 moles) of 100% hydrazine hydrate, contained in a 1-1. round-bottomed Hank, iH added 236 g. (243 ml., 2.0 moles) of diethyl carbonate (Note I). The flask is fitted with a calcium chloride-containing drying tube and is shaken vigorously to mix the two liquids. After about 5 minutes, the milky emulsion becomes warm, and shaking is continued until a clear solution is obtained (approximately 20 minutes). The flask is equipped with a reflux condenser fitted with a calcium chloride-containing drying tube and is heated on a steam bath for 3.5 hours. The reaction mixture is transferred to a 500-ml. round-bottomed flask and is... 

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