Studies culminating in the total synthesis and determination of the absolute configuration of (−)-saudin
作者:Robert K. Boeckman、Maria Rico del Rosario Ferreira、Lorna H. Mitchell、Pengcheng Shao、Michael J. Neeb、Yue Fang
DOI:10.1016/j.tet.2011.09.067
日期:2011.12
A full account of studies that culminated in the total synthesis of both antipodes and the assignment of its absolute configuration of Saudin, a hypoglycemic natural product. Two approaches are described, the first proceeding though bicyclic lactone intermediates and related second monocyclic esters. The former was obtained via asymmetric Diels–Alder cycloaddition and the latter by an asymmetric annulation
Enantioselective synthesis of the white key intermediate for the synthesis of trisporic acids
作者:José A. Bacigaluppo、María I. Colombo、Raquel M. Cravero、Manuel González-Sierra、Marcelo D. Preite、Juan Zinczuk、Edmundo A. Rúveda
DOI:10.1016/s0957-4166(00)86255-2
日期:1994.10
The asymmetric construction of the alkylated cyclohexenone carboxylic acid moiety of trisporic acids A, B and C and the syntheses of related precursors are described. The syntheses feature a Michael addition in tandem with an aldol condensation as the central step.