| abstract |
NEW MATERIAL:(-)-Diallyl(2-octyl)phenyltin shown by the formula. n USE: A reagent for asymmetric allylation of ketone or aldehyde. A homoallyl alcohol obtained by this reaction is useful as an intermediate for synthesis. n PREPARATION: An optically active (2-octyl)triphenyltin[e.g., (-)-(R)-2-octyltriphenyltin, etc.] is reacted with bromine to give an optically active (2-octyl) pheyltin dibromide, which is reacted with an allylmagnesium hydride or tosylate in a solvent such as an ether, THF, etc. preferably at -100W120°C. n COPYRIGHT: (C)1985,JPO&Japio |