blazeispirol A 在
三氟化硼乙醚 作用下,
以
氯仿 为溶剂,
反应 0.5h,
生成 (20S,22R,24R)-22,25-epoxy-5-methoxy-14β-methyl-18-nor-des-A-ergosta-5,7,9,11,13(17)-pentaen-23-one 、 (23S,24S)-13,23-cyclo-25-hydroxy-14β-methyl-18-nor-des-A-ergosta-5,7,9,11,17(20)-pentaen-22-one 、 (17R,20S,24S)-17(13->7)abeo-20,25-epoxy-5-methoxy-des-A-ergosta-5,7,9,11,13-pentaen-22-one 、 (17S,20S,24S)-17(13->7)abeo-20,25-epoxy-5-methoxy-des-A-ergosta-5,7,9,11,13-pentaen-22-one