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Communication | Special issue | Vol 11, No. 1, 1978, pp.293-298
Published online, 1st January, 1970
DOI: 10.3987/S(N)-1978-01-0293
Syntheses, Photochemical and Thermal Isomerizations of Pyrazolotropilidenes and Pyrazolonorcaradienes

Tsutomu Miyashi, Yoshinori Nishizawa, and Toshio Mukai*

*Department of Chemistry, Faculty of Science, Tohoku University, Aoba-ku, Ssendai 980-8578, Japan

Abstract

Syntheses of several pyrazolotropilidene derivatives (2, 3, 4 and 6) and irradiation of the phenyl derivative (2) were studied to know the effect of the fused pyrazole ring on photochemical and thermal valence isomerizations of pyrazolonorcaradienes (7 and 8).