6-[2-(2,6-dichloro-4-methyl-phenoxy)ethoxy]-1'-(2,2,2-trifluoroacetyl)-1',2',5',6'-tetrahydro-[3,4']bipyridinyl-3'-carboxylic acid ethyl ester 在
盐酸 作用下,
以
2-甲基四氢呋喃 、
1,4-二氧六环 为溶剂,
以11.2 kg的产率得到6-[2-(2,6-dichloro-4-methyl-phenoxy)ethoxy]-1'-(2,2,2-trifluoroacetyl)-1',2',5',6'-tetrahydro-[3,4']bipyridinyl-3'-carboxylic acid ethyl ester hydrochloride