Organic synthesis in solid media.Silica gel as an effective and resuable medium for the selective allylation of aldehydes withtetrallyltin

摘要

Wet silica gel promotes the chemoselective and almost complete alloylation of aldehydes with 0.25-0.30 molar equivalents of tetraallyltin without an organic solvent,leaing no organotin compounds,requiring neither extraction nor chromatographic separation after the reaction,and enabling the repeated use of the silica gel.