Rapamycin;
immunosuppressant;
ketenedithioacetal;
triene 1,4-asymmetric induction;
Julia olefination;
D O I:
暂无
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Keys steps in a synthesis of the C10-C26 fragment of the immunosuppressant Rapamycin include (a) the use of a metallated benzothiazolyl sulfone in a one-pot Julia olefination to create the C21-C22 alkene stereoselectively and (b) a diastereoselective acid-catalysed cyclisation of a hydroxyl function onto a ketenedithioacetal (1,4-asymmetric induction) in order to create the oxane ring and fix the stereochemistry at C11.