Addition of MeMgSnBun 3 to terminal enyne; preparation of geometrically pure 2-substituted 1-lodo-1,3-dienes

Abstract
The title iododienes have been prepared from 6-phenylhex-3-en-yne by the addition of methylmagnesiumtributyltin, followed by reactions of stannylmagnesium intermediate Awith appropriate electrophiles and of the resulting alkylated stannylidiene Bwith iodine.

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