rac-ethyl ((9R,10R,11S,15S,E)-11,13,14,15-tetrachloro-9,10-dimethyl-9,10-dihydro-12l4-9,10-[2,3]thiophenoanthracen-12-ylidene)carbamate 在
zinc(II) chloride 、
锌 作用下,
以
甲醇 为溶剂,
以100%的产率得到2,3-dichloro-9,10-dimethyl-4,9-dihydro-4,9<1',2'>benzenonaphtho<2,3-b>thiophene