The Rearrangement of 2,3-Epoxysulfonates and Its Application to Natural Products Syntheses: Formal Synthesis of (−)-Aphanorphine and Total Syntheses of (−)-α-Herbertenol and (−)-Herbertenediol
作者:Yasuyuki Kita、Junko Futamura、Yusuke Ohba、Yoshinari Sawama、Jnaneshwara K. Ganesh、Hiromichi Fujioka
DOI:10.1021/jo034573g
日期:2003.7.1
The Lewis acid treatment of 2,3-epoxysulfonates with 2,3-dialkyl substituents or 2-alkyl-3-aryl substituents produced the rearrangementproducts via C3-cleavage of the oxirane ring in high yields. On the other hand, 2-aryl-3-alkyl-2,3-epoxysulfonates produced the products via C2-cleavage of the oxirane ring. The sulfonyloxy groups of the alpha-sulfonyloxy ketones, having a chiral benzylic quaternary