3-[N-(tert-butoxycarbonyl)-N-[2-[5-(4-cyclobutyl-3-trifluoromethylbenzyloxy)indolin-1-yl]-2-oxoethyl]amino]propionic acid tert-butyl ester 、
三氟乙酸 以
二氯甲烷 为溶剂,
反应 9.0h,
以whereby the title compound (259 mg) was yielded的产率得到3-[N-[2-[5-(4-cyclobutyl-3-trifluoromethylbenzyloxy)indolin-1-yl]-2-oxoethyl]amino]propionic acid trifluoroacetate