Heck reaction of endocyclic enecarbamates with diazonium salts. Formal enantioselective syntheses of alkaloids (−)-codonopsine and (−)-codonopsinine, and the synthesis of a new C-aryl azasugar
作者:Denilson F. Oliveira、Elias A. Severino、Carlos Roque D. Correia
DOI:10.1016/s0040-4039(99)00151-3
日期:1999.3
Formal total syntheses of the pyrrolidine alkaloids (−)-codonopsine and (−)-codonopsinine, as well as the synthesis of a new C-aryl azasugar were accomplished from a common 5-membered, enantiomerically pure endocyclic enecarbamate. The key step in those syntheses relies on a novel and practical version of the Heck reaction involving endocyclic enecarbamates and diazonium salts.
吡咯烷生物碱(-)-codonopsine和(-)-codonopsinine的形式总合成以及新的C-芳基氮杂糖的合成是由一种常见的5元对映体纯的内环烯氨基甲酸酯完成的。这些合成过程中的关键步骤依赖于Heck反应的一种新颖实用的形式,该反应涉及到内环烯氨基甲酸酯和重氮盐。