(S)-2-{[2,4-bis-(4-methoxy-phenoxy)-phenylamino]-methyl}-pyrrolidine-1-carboxylic acid tert-butyl ester 以
trifluoracetic acid-dichloromethane 为溶剂,
反应 0.75h,
以to afford Cpd 53 as a TFA salt (0.082 g, 84% yield)的产率得到(S)-[2,4-Bis-(4-methoxy-phenoxy)-phenyl]-pyrrolidin-2-ylmethyl-amine