Construction of Consecutive Chiral Non-Racemic Quaternary and Tertiary Carbon Centers: A Short Synthetic Route to (−)-Acetomycin
作者:Jun′ichi Uenishi、Motoi Kawatsura、Daiji Ikeda、Nobuhiro Muraoka
DOI:10.1002/ejoc.200300504
日期:2003.10
substitution of 2-methylacetoacetate with a chiral non-racemic π-allyl Pd complex creates consecutive chiral non-racemic quaternary and tertiary carbon centers. σ-Bond formation between the re-face of the π-allyl Pd complex and the re-face of the enol acetoacetate was controlled by the o-(diphenylphosphanyl)arylcarboxylic acid ligand selectively. (−)-Acetomycin was synthesized in seven steps using this
2-乙酰乙酸甲酯与手性非外消旋 π-烯丙基 Pd 络合物的区域和非对映选择性亲核取代产生连续的手性非外消旋季碳和叔碳中心。π-烯丙基钯配合物的表面与烯醇乙酰乙酸酯的表面之间的σ-键形成受邻-(二苯基膦基)芳基羧酸配体的选择性控制。(-)-Acetomycin 是使用这种关键方法分七个步骤合成的。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)