α-METALLATED VINYL CARBANIONOIDS. I. FORMATION OF α-STANNYLVINYL ANIONOIDS FROM 1,1-BIS(TRIMETHYLSTANNYL)ALKENES

Article abstract of DOI:10.1016/0022-328X(83)80057-6

Hydrostannation of 1-stannyl-1-alkynes leads to the formation of 1,1- and 1,2-distannyl-1-alkenes.The former can undergo lithiation (by alkyllithium in THF) with varying degrees of stereospecificity. 1,1-Dilithio-1-alkenes cannot be prepared by double lit