Abstract
Allyltin trihalides, intermediates in tin(IV) halide promoted reactions of 5-alkoxy-4-methylpent-2-enyl(triphenyl)- stannanes with aldehydes which proceed with 1,5-induction, have been trapped by phenyllithium to give [(3RS,4SR)-5-alkoxy-4-methylpent-1-en-3-yl](triphenyl)stannanes.