(2R,3S)-6-[1-[3,5-Dichloro-2-(3-methyl-but-2-enyloxy)-phenyl]-meth-(E)-ylidene]-3,4-dimethyl-2-phenyl-[1,4]oxazepane-5,7-dione 以
氯仿 为溶剂,
反应 132.0h,
以21%的产率得到(3S,4R,7aS,13bR)-10,12-dichloro-2,3,7,7-tetramethyl-4-phenyl-3,4,7a,13b-tetrahydro-7H,8H-chromeno[4',3':4,5]pyrano[3,2-f][1,4]oxazepin-1(2H)-one