On the Lewis acid-catalysed reaction of the 2,3-bis(trimethylstannyl)-1-alkene moiety with aldehydes
摘要:
Compounds containing the 2,3-bis(trimethylstannyl)-1-alkene moiety react with aldehydes in the presence of boron trifluoride etherate to give homoallylic alcohols in which the remaining vinylic stannyl moiety has undergone halodemethylation. A mechanistic explanation for this behaviour is presented. NMR studies indicate that the addition proceeds in an erythro-selective manner.
Free radical and palladium-catalysed hydrostannation of allenes: a comparison
作者:Terence N. Mitchell、Ulrich Schneider
DOI:10.1016/0022-328x(91)86272-r
日期:1991.3
While free radical hydrostannation of monosubstituted allenes with Me3SnH affords mixtures of varying composition, cyclohexylidene allene is attacked by the stannyl radical preferentially at the central carbon atom. In contrast, palladium-catalysed hydrostannation involves a regioselective attachment of the organotin moiety to the less highly substituted terminal carbon atom of the allene framework