Enantioselective Total Synthesis of Briarellins E and F: The First Total Syntheses of Briarellin Diterpenes
作者:Olivier Corminboeuf、Larry E. Overman、Lewis D. Pennington
DOI:10.1021/ja035445c
日期:2003.6.1
Enantioselective totalsyntheses of briarellin E (4) and briarellin F (5) have been achieved starting with (S)-(+)-carvone and (S)-(-)-glycidol. These totalsyntheses are the first of briarellin diterpenes. The central step in these syntheses is acid-promoted condensation of cyclohexadienyl diol 15 and (Z)-alpha,beta-unsaturated aldehyde 16 to form, with complete stereocontrol, the hexahydroisobenzofuran
A Unified Strategy for Enantioselective Total Synthesis of Cladiellin and Briarellin Diterpenes: Total Synthesis of Briarellins E and F and the Putative Structure of Alcyonin and Revision of Its Structure Assignment
作者:Olivier Corminboeuf、Larry E. Overman、Lewis D. Pennington
DOI:10.1021/jo9010156
日期:2009.8.7
Enantioselective total syntheses of briarellin E (12) and briarellin F (13), as well as the structure originally proposed for the cladiellin diterpene alcyonin (10), have been realized. Comparison of the spectral data for synthetic 10, natural alcyonin, cladiellisin (33), and cladiellaperoxide (34), as well as chemical transformations of 10 and natural alcyonin, suggest that the structure of this coral