(2R)-tert-butyl 1-(9-(ethylsulfonyl)-3-(tetrahydro-2H-pyran-4-yl)-2,3,4,9-tetrahydro-1H-carbazole-6-carbonyl)pyrrolidine-2-carboxylate 、
氢氧化锂 、
溶剂黄146 在
(2R)-1-(9-(ethylsulfonyl)-3-(tetrahydro-2H-pyran-4-yl)-2,3,4,9-tetrahydro-1H-carbazole-6-carbonyl)pyrrolidine-2-carboxylic acid 、 (2R)-1-[6-(oxan-4-yl)-6,7,8,9-tetrahydro-5H-carbazole-3-carbonyl]pyrrolidine-2-carboxylic acid 作用下,
以
甲醇 、
水 为溶剂,
以to obtain a pH of 5-6的产率得到(2R)-1-(9-(ethylsulfonyl)-3-(tetrahydro-2H-pyran-4-yl)-2,3,4,9-tetrahydro-1H-carbazole-6-carbonyl)pyrrolidine-2-carboxylic acid