Enantioselective synthesis of β-substituted cyclic ketones via cobalt-catalyzed asymmetric reductive coupling of alkynes with alkenes

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Enantioselective synthesis of β-substituted cyclic ketones via cobalt-catalyzed asymmetric reductive coupling of alkynes with alkenes

Author : Dr. S. Mannathan

Year : 2011

Source Title : Journal of the American Chemical Society

Document Type :

Abstract

A CoI2/(R)-BINAP, Zn, ZnI2, H2O system efficiently catalyzes the intermolecular asymmetric reductive coupling of alkynes with cyclic enones to afford highly regioand enantioselective β-alkenyl cyclic ketones. A possible mechanism that involves the formation of a cobaltacyclopentene intermediate from the alkyne and cyclic enone is proposed. © 2011 American Chemical Society.