M. Yasuda et al., ALLYLATION OF UNACTIVATED KETONES BY TETRAALLYLTIN ACCELERATED BY PHENOL - APPLICATION TO ASYMMETRIC ALLYLATION USING A TETRAALLYLTIN-BINOLSYSTEM, Chemistry Letters, (8), 1998, pp. 743-744
The tetraallyltin-phenol system was mild and effective for allylation
of unactivated ketones, giving tertiary alcohols in high yields. The a
symmetric allylation was achieved by a tetraallyltin-homochiral BINOL
(1,1'-bi-2-naphthol) system. The addition of methanol raised the enant
ioselectivity to afford the tertiary homoallylic alcohol up to 60% ee.