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Furan derivatives. CLIV. Synthesis of 5-nitrofuran type cyclopropanes by a reaction of diazomethane with α,β-unsaturated sulfones

A. Jurášek, D. Polakovičová, M. Dandárová, and J. Kováč

Department of Organic Chemistry, Slovak Technical University, 880 37 Bratislava

 

Abstract:  Reaction of diazomethane with l-(5-nitro-2-furoyl)-l-phenylsulfonyl-2-(4-X-phenyl)ethylenes in tetrahydrofuran at 0—5°C yielded the corre­sponding l-(5-nitro-2-furoyl)-l-phenylsulfonyl-2-(4-X-phenyl)cyclopropanes (X = CN, F, CI, N0 2 ). The formation of pyrazolines, the possible intermediates of the cycloaddition reaction, has not been observed under the applied reaction conditions.

Full paper in Portable Document Format: 343a394.pdf

 

Chemical Papers 34 (3) 394–398 (1980)

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