3-(4-Chloro-phenylcarbamoyl)-5-ethoxycarbonyl-1,2,6-trimethyl-4-phenyl-pyridinium; perchlorate 在
sodium tetrahydroborate 作用下,
以
乙腈 为溶剂,
以7.4%的产率得到5-(4-Chloro-phenylcarbamoyl)-1,2,6-trimethyl-4-phenyl-1,2-dihydro-pyridine-3-carboxylic acid ethyl ester