Preparation and Thermal Decomposition of Selected Pyrazolines.

Abstract

Diazomethane has been added to a group of a, /3-unsaturated esters and amides to form substituted pyrazolines and dipyrazolines. Several of these compounds have been decomposed thermally, and their alicyclic and olefmic decomposition products have been identified. For the identification of the olefin, a mixture of the cyclopropane and the olefin was treated with diazomethane, only the olefin reacted, and the mixture of the cyclopropane and the resulting pyrazoline could be separated by fractional distillation.