methyl 2-n-propyl-3-{2'-(1H-tetrazol-5-yl)-biphenyl-4-yl]methyl-4,5,6,7-tetrahydroimidazo[4,5-c]-pyridine-4-carboxylate 、
丙二酸单乙酯 以to give methyl 2-n-propyl-5-ethoxycarbonylacetyl-3-(2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl-4,5,6,7-tetrahydroimidazo[4,5-c]-pyridine-4-carboxylate的产率得到methyl 2-n-propyl-5-ethoxycarbonylacetyl-3-(2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl-4,5,6,7-tetrahydroimidazo[4,5-c]-pyridine-4-carboxylate