Palladium-Catalyzed Ring Opening of Isoprene Monoxide with Nitrogen Nucleophiles - Asymmetric Synthesis of Branched Amino Sugars
作者:Barry M. Trost、Chunhui Jiang、Kristin Hammer
DOI:10.1055/s-2005-918443
日期:——
The Pd-catalyzed regio- and enantioselective ring opening of isoprene monoxide with primary amines as pronucleophiles is developed with good yield and enantioselectivity, constructing a quaternary stereocenter enantioselectively. This methodology was used as the chirality inducing key step in the asymmetric synthesis of vancosamine derivative 19. The synthesis was achieved in 9 total steps and 28.6%
以伯胺为亲核试剂的 Pd 催化区域和对映选择性开环一氧化异戊二烯具有良好的收率和对映选择性,构建了四元立体中心对映选择性。该方法被用作万可胺衍生物 19 不对称合成中的手性诱导关键步骤。该合成在 9 个总步骤中实现,总产率为 28.6%。