(2R,2aR,5R,5aR,8aR)-5-(tert-Butyl-diphenyl-silanyloxy)-4-methyl-2-trityloxy-2,2a,5,5a-tetrahydro-1,6-dioxa-cyclobuta[d]inden-8-one 在
正丁基锂 、
甲酸 、
四丁基氟化铵 作用下,
以
叔丁醇 为溶剂,
反应 6.5h,
生成 (2R,4S,6R,8R,9S)-2-{(2E,6E)-(R)-8-[(3aS,4S,7R,7aR)-7-(tert-Butyl-diphenyl-silanyloxy)-3a-hydroxy-4-hydroxymethyl-6-methyl-3a,4,7,7a-tetrahydro-benzofuran-(3E)-ylidene]-3,5-dimethyl-octa-2,6-dienyl}-8,9-dimethyl-1,7-dioxa-spiro[5.5]undecan-4-ol