Synthesis of Phytuberin. 4-<i>endo-tet</i> Acid-Catalyzed Cyclization of α-Hydroxy Epoxides
作者:Thierry Prangé、María S. Rodríguez、Ernesto Suárez
DOI:10.1021/jo034129d
日期:2003.5.1
The total synthesis of phytuberin, a phytoalexin of the Solanum genus, from (-)-alpha-santonin is reported. The key steps include (a) reductive cleavage of the C-O bond of the gamma-lactone with concomitant protection of the C1 double bond, (b) Sharpless stereocontrolled hydroxy-assisted epoxidation of allylic alcohol 6 and simultaneous deprotection of the C1 double bond, (c) a rare 4-endo-tet acid-catalyzed