Efficient synthesis of cyclopropylhydrazine salts

An efficient procedure for the synthesis of cyclopropylhydrazine in the form of its salts is reported. The copper salt-catalyzed addition of cyclopropylboronic acid to the azo group of di-tert-butyl azodicarboxylate and subsequent deprotection gave the cyclopropylhydrazine salts in high yields. (C) 2014 Elsevier Ltd. All rights reserved.