ethyl <2,2-dichloro-1-<3-(trifluoromethyl)phenyl>ethylidene>hydrazinecarboxylate 、
4-((E)-3,3,3-Trifluoro-propenyl)-morpholine 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以25%的产率得到ethyl (3R,4R,5R)-5-chloro-3-morpholin-4-yl-4-(trifluoromethyl)-6-[3-(trifluoromethyl)phenyl]-4,5-dihydro-3H-pyridazine-2-carboxylate