Highly stereo- and regiocontrolled cyclopentannulation via allylphosphonate conjugate addition and hydroboration-oxidation-elimination. Synthesis of pentalenic acid with virtually complete stereo- and regiocontrol
bovine respiratory disease. These properties qualified 1 and 2 as potential lead structures for new veterinary antibiotics; however, neither the absolute nor the relative configurations had been determined, nor were the compounds available any longer. We thus developed total syntheses of 1 and 2 and clarified their structures and their biological profiles. Key steps were two [2+2+2] CpCo(CO)2-mediated
Stereoselective, one-step assembly of the strained protoilludane framework by cobalt-mediated cyclization of an acyclic enediyne precursor. A total synthesis of illudol
作者:Erik P. Johnson、K. Peter C. Vollhardt
DOI:10.1021/ja00001a067
日期:1991.1
with respect to the remainder. Among the synthetically most challenging protoilludanes ranks illudol (1), because it combines the task of constructing the unusual angular and strained hydrocyclobutaindane nucleus with that of controlling five contiguous stereocenters. The authors report the synthesis of illudol.