On the stereoselectivity of reactions of alkoxyallylstannanes and alkoxy aldehydes
作者:Pedro Almendros、Eric J. Thomas
DOI:10.1039/a702257c
日期:——
Different behaviour is observed in tin(IV)
halide promoted
reactions between the 2-(1-alkoxyethyl)prop-2-enylstannane 10 and the
4-alkoxypent-2-enylstannanes 1 with 2-alkoxy aldehydes. The chirality of
the aldehyde would appear to dominate the stereoselectivity in the
former case with the preferred addition following the chelation
controlled mode, whereas the stannane dominates the stereoselectivity in
the latter. The different behaviour of these two types of stannane may
be a reflection of the coordination of the tin in the intermediate
allyltin trihalides which are believed to be the reactive species
involved in the reactions with the aldehydes.