[2-[4-(2-tert-butoxycarbonylamino-ethyl)-phenylcarbamoyl]-2-(2,4,6-trimethyl-benzenesulfonylamino)-ethyl]-carbamic acid benzyl ester 在
palladium-carbon 作用下,
以80 mg (95%)的产率得到(2-{4-[3-Amino-2-(2,4,6-trimethyl-benzenesulfonylamino)-propionylamino]-phenyl}-ethyl)-carbamic acid tert-butyl ester