Allylation reactions of acylsilanes as synthetic equivalents of aldehydes. Application to a stereocontrolled synthesis of (1S,2S,5S)-(10S)-and-(10R)-allyl myrtanol
作者:Bianca Flavia Bonini、Mauro Comes-Franchini、Mariafrancesca Fochi、Germana Mazzanti、Cristiano Nanni、Alfredo Ricci
DOI:10.1016/s0040-4039(98)01413-0
日期:1998.9
The allylation of acylsilanes with tetraallyltin in the presence of catalytic amounts of Sc(OTf)3 proceeded smoothly to afford the silylated homoallylic alcohols in good yields. Subsequent protiodesilylation gave the formal adducts of the corresponding aldehydes. The homochiral acylsilane 11 gave a reversal of asymmetric induction in the Sc(OTf)3 catalyzed allylation and in the Sakurai reaction.
在催化量的Sc(OTf)3存在下,酰基硅烷与四烯丙基烯烃的烯丙基化反应顺利进行,从而以良好的产率提供了甲硅烷基化的均烯丙基醇。随后的丙二硅烷基化得到相应醛的形式加合物。均手性酰基硅烷11在Sc(OTf)3催化的烯丙基化反应和樱井反应中给出了不对称诱导的逆转。