Intramolecular photocycloadditions-cyclobutane fragmentation: total synthesis of (.+-.)-pentalenene, (.+-.)-pentalenic acid, and (.+-.)-deoxypentalenic acid
作者:Michael T. Crimmins、Joe A. DeLoach
DOI:10.1021/ja00264a037
日期:1986.2
Pentalenene, pentalenic acid, and deoxypentalenicacid, important metabolites in the biosynthesis of the pentalenolactones, have been synthesized from methyl isobutyrate through a common intermediate. The initial key step involves a novel conjugate addition-cycloacylation sequence on an acetylenic diester. The 1,6-diene which results is converted in two steps to a 1,6-diene diester which undergoes