对甲苯磺酸 、
[5-[Bis(phenylmethoxycarbonylamino)methylideneamino]naphthalen-2-yl] 2-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoate 在
palladium on activated charcoal
氢气 作用下,
以
乙醚 、
乙醇 为溶剂,
以85%的产率得到2-tert-Butoxycarbonylamino-2-methyl-propionic acid 5-guanidino-naphthalen-2-yl ester; compound with toluene-4-sulfonic acid