Stereoselective synthesis of conjugated alkenynes via palladium-catalyzed coupling of alkenyl iodonium salts with terminal alkynesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A novel method for stereospecific synthesis of conjugated alkenynes is suggested. The reaction of (E)-[beta-(trifluoromethanesulfonyloxy)-1-alkenyl](phenyl) iodonium trifluoromethanesulfonate with terminal alkynes in the presence of catalytic amounts of dichloro(triphenylphosphine)palladium(II) and CuI in aqueous medium proceeds stereospecifically to give the corresponding enynes in good yields. A possible mechanism for these cross-coupling reactions is discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.