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Communication | Special issue | Vol 15, No. 2, 1981, pp.753-756
Published online, 1st January, 1970
DOI: 10.3987/S-1981-02-0753
■ Thermal Decomposition of 1,3-Dipolar Cycloadducts of Pyridazine N-Acetylimines and Tetrachlorocyclopropene

Akio Ohsawa, Ikuo Wada, and Hiroshi Igeta*

*School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan

Abstract

Thermolysis of 6-acetyl-4b,5,5,5a-tetrachloro-4a,4b,5a,6-tetrahydro-5H-cyclopropa[3,4]pyrazolo[1,5-b]pyridazines afforded 2-chloro-3-(dichloromethyl)pyrazolo[1,5-b]pyridazines which were converted to various types of pyrarolo[1,5-b]pyridazines.