O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate 、
3-chloro-6-(3-furanyl)-8-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylic acid 、
N-Boc-L-赖氨酸甲酯盐酸盐 以gave (S)-6-tert-butoxycarbonylamino-2-[(6-furan-3-yl-8-trifluoromethyl-imidazo[1,2-a]pyridine-2-carbonyl)-amino]-hexanoic acid methyl ester (98 mg, 54%) as a white solid的产率得到(S)-6-tert-butoxycarbonylamino-2-[(6-furan-3-yl-8-trifluoromethyl-imidazo[1,2-a]pyridine-2-carbonyl)-amino]-hexanoic acid methyl ester