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Paper | Regular issue | Vol 29, No. 8, 1989, pp.1537-1543
Published online, 1st January, 1970
DOI: 10.3987/COM-89-4994
Reactions of Diazo Compounds of Heterocyclic Aldehydes with Phenylacetylene: Formation of Pyrazoles Combined with Heterocycles

Katsuhiro Saito,* Hiroshi Fushihara, Tatsuji Sato, Hiraku Ishihara, and Kensuke Takahashi

*Faculty of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Abstract

Reactions of sodium salts of 2- and 3-thiophenecarbaldehyde tosylhydrazone and furfural tosylhydrazone with phenylacetylene afforded pyrazoles combined with thiophene and furan moieties via 1,3-dipolar cycloadditions of the corresponding diazo compounds.