[(R,R), (S,S)]-6,7-dimethoxy-2-methyl-3,4-dihydro-2H-quinoline-1,4-dicarboxylic acid 1-ethyl ester 4-methyl ester 、
[(R,S), (S,R)]-6,7-dimethoxy-2-methyl-3,4-dihydro-2H-quinoline-1,4-dicarboxylic acid 1-ethyl ester 4-methyl ester 在
sodium hydroxide 、
水 作用下,
以
1,4-二氧六环 为溶剂,
反应 12.0h,
生成 [(R,S), (S,R)]-6,7-dimethoxy-2-methyl-3,4-dihydro-2H-quinoline-1,4-dicarboxylic acid 1-ethyl ester 、 [(R,S), (S,R)]-6,7-dimethoxy-2-methyl-3,4-dihydro-2H-quinoline-1,4-dicarboxylic acid 1-ethyl ester