(S)-6-(3-hydroxypyrrolidin-1-yl)-3',4',5',6'-tetrahydro-2'H-[3,4']bipyridinyl-1',3'-dicarboxylic acid 1'-tert-butyl ester 3'-methyl ester 、
2,6-二氯对甲酚 在
三丁基膦 、
1,1'-azodicarbonyl-dipiperidine 作用下,
以
甲苯 为溶剂,
反应 5.0h,
生成 (3'S,4'S)-6-((R)-3-(2,6-dichloro-4-methylphenoxy)pyrrolidin-1-yl)-3',4',5',6'-tetrahydro-2'H-[3,4']bipyridinyl-1',3'-dicarboxylic acid 1'-tert-butyl ester 3'-methyl ester 、 (3'R,4'S)-6-((R)-3-(2,6-dichloro-4-methylphenoxy)pyrrolidin-1-yl)-3',4',5',6'-tetrahydro-2'H-[3,4']bipyridinyl-1',3'-dicarboxylic acid 1'-tert-butyl ester 3'-methyl ester 、 (3'S,4'R)-6-((R)-3-(2,6-dichloro-4-methylphenoxy)pyrrolidin-1-yl)-3',4',5',6'-tetrahydro-2'H-[3,4']bipyridinyl-1',3'-dicarboxylic acid 1'-tert-butyl ester 3'-methyl ester 、 (3'R,4'R)-6-((R)-3-(2,6-dichloro-4-methylphenoxy)pyrrolidin-1-yl)-3',4',5',6'-tetrahydro-2'H-[3,4']bipyridinyl-1',3'-dicarboxylic acid 1'-tert-butyl ester 3'-methyl ester