6-chloro-2-(5-formyl-pyridin-3-yl)-1-methyl-1H-indole-3-carbonitrile 、
(R)-3-叔丁氧羰基氨基吡咯烷 以to give {(R)-1-[5-(6-chloro-3-cyano-1-methyl-1H-indol-2-yl)-pyridin-3-ylmethyl]-pyrrolidin-3-yl}-carbamic acid tert-butyl ester的产率得到{(R)-1-[5-(6-chloro-3-cyano-1-methyl-1H-indol-2-yl)-pyridin-3-ylmethyl]-pyrrolidin-3-yl}-carbamic acid tert-butyl ester