Heck reaction of endocyclic enecarbemates with diazonium salts. Formal enantioselective syntheses of alkaloids (-)-codonopsine and (-)- codonopsinine, and the synthesis of a new C-aryl azasugar

Article abstract of DOI:10.1016/S0040-4039(99)00151-3

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 s