The synthesis and physical properties of dineophyl(-)menthyltin (4) an
d methylneophyl (-)menthyltin (9) hydrides as well as that of their or
ganotin precursors are described. Whereas the reduction of acetophenon
e with 4 afforded (-)-(S)-1-phenylethanol in 40% ee, the reduction of
the same ketone with dimethyl(-)menthyltin hydride yielded the alcohol
with only a 7% ee. Full H-1,C-13, and Sn-119 NMR data are given.