Methoxy(phenylthio)(trimethylsilyl)methane as a one-carbon homologation reagent: efficient 1,4-addition of a formyl or a carboxy anion equivalent to cyclic .alpha.-enones concomitant with in situ .alpha.-alkylation
The efficient consecutive β-carboxylation and α-alkylation of cyclic α,β-enones; a new route to sarkomycin
作者:Junzo Otera、Yoshihisa Niibo、Hiroshi Aikawa
DOI:10.1016/s0040-4039(00)96066-0
日期:1987.1
introduction of a carboxy group equivalent and an alkyl group at the respective β- and α-positions of cyclic enones has been achieved through a 1,4-additionreaction of [methoxy(phenylthio)(trimethylsilyl)methyl] lithium followed by direct trapping of the resulting enolate with alkyl halides. The present method proved to be applicable to a simple synthesis of sarkomycin.
Methoxy(phenylthio)(trimethylsilyl)methane as a one-carbon homologation reagent: efficient 1,4-addition of a formyl or a carboxy anion equivalent to cyclic .alpha.-enones concomitant with in situ .alpha.-alkylation