N,N'-bis( tert-butoxycarbonyl)-1H-pyrazole-1-carboxamidine 、 Fmoc-Orn(Dde)-OH 、 (2S,3R)-2-(1-Carboxy-2-methyl-propenylcarbamoyl)-3-hydroxy-3-methyl-pyrrolidine-1-carboxylic acid 9H-fluoren-9-ylmethyl ester 、
4-(3-tert-Butoxycarbonylamino-propoxy)-3-(3-isopropenyl-quinolin-4-yl)-benzoic acid 以82%的产率得到