A homo-Michael addition reaction of lithium selenolates with 1-(1-alkynyl) cyclopropyl ketones and the subsequent reaction with electrophiles such as PhSeBr, NFSI and NCS is reported. Based on the nature of electrophiles, this reaction may afford highly substituted 1,2-allenyl ketones or furans (E = PhSe ) and 2-alkynyl ketones (E = F , Cl , active halides) as the final products, respectively.

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Zhejiang University; Nanchang University