Abstract
Pushing the Nazarov envelope: An electrophilic complex (1; see scheme; EDG=electron-donating group, EWG=electron-withdrawing group, binap=2,2-bis(diphenylphosphanyl)-1,1-binaphthyl) exhibits unusual catalytic activity in the polarized Nazarov cyclization reaction. Aryl vinyl ketones that show poor reactivity with well-known catalysts can be readily cyclized with 1/AgSbF6 (1:1) under mild reaction conditions with concurrent AgBr precipitation.
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