Abstract
The new cascade reaction was found: the formation of cyclopropanes from alkylidenemalononitriles and malononitrile by the only bromine direct action; the action of aqueous bromine on the equal amounts of alkylidenemalononitriles and malononitrile in EtOH–H2O solutions results in the formation of 3-substituted 1,1,2,2-tetracyanocyclopropanes in 55–98% yields.
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