7-(3-pyridyl)hept-6-enoic acid 、 (RS)-5-(4-Benzyloxy-phenyl)-4-tertbutoxycarbonylamino-pent-2-enoic acid methyl ester 以(250 mg, 0.61 mmol) to afford the title compound (79.4 mg, 26%) as a gum的产率得到(RS)-5-(4-Benzyloxy-phenyl)-4-(7-pyridin-3-yl-heptanoylamino)-pentanoic acid methyl ester