(±)-lsopodophyllotoxone 6a and the related lactones 8a and 9a were synthesized by a biomimetic procedure from the ester 5a by oxidation with a CrO3-HBF4-MeCN reagent system in one step. 4'-Benzyl-isopodophyllotoxone 6b, 4'-benzyl-picropodophyllone 7b, and the γ-lactones 8b and 9b were also synthesized from the ester 5b by oxidation with the same reagent system.
(±)-lsopodophyllotoxone 6a 和相关内酯 8a 和 9a 是通过
生物模拟程序,以酯 5a 为原料,用
CrO3-
HBF4-MeCN 试剂体系氧化一步合成的。4'-Benzyl-isopodophyllotoxone 6b、4'-benzyl-picropodophyllone 7b 以及 γ-内酯 8b 和 9b 也是用相同的试剂体系通过氧化从酯 5b 合成的。