Cyclopropanes of 5-nitrofurane series. Reactions of diazomethane with 1-(5-nitro-2-furyl)-1-trichloromethylsulphonyl-2-R-ethylenes

J Prousek, A Jurášek, J Kováč

Index: Prousek, Josef; Jurasek, Adolf; Kovac, Jaroslav Collection of Czechoslovak Chemical Communications, 1980 , vol. 45, # 6 p. 1704 - 1714

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Citation Number: 5

Abstract

Abstract Diazomethane reacts with trisubstituted ethylenes of 5-nitrofurane series within the temperature range-60 C to+ 20 C with direct formation of cyclopropane derivatives IV without pyrazoline intermediates. This reaction does not proceed as a 1, 3-dipolar cycloaddition but goes via nonfinished stepwise mechanism discussed in the present paper. The cyclopropane derivative IVa has been prepared as a model substance via the new ...