2-n-Propyl-4-(2-aminoethyl)-1-[2'-(t-butoxycarbonyl)biphenyl-4-yl]methylimidazole 、
Ethyl glyoxylate hydrate 在
氯仿 、
盐酸 、 crude product 、
草酸 、 ethanol-ether 作用下,
以
四氢呋喃 为溶剂,
反应 16.5h,
以to give ethyl 2-n-propyl-3-[2'-(t-butoxycarbonyl)biphenyl-4-yl]methyl-4,5,6,7-tetrahydroimidazo[4,5-c]pyridine-4-carboxylate oxalate (8.45 g)的产率得到Ethyl 2-n-propyl-3-{2'-(tert-butoxycarbonyl)-biphenyl-4-yl}methyl-4,5,6,7-tetrahydroimidazo[4,5-c]-pyridine 4-carboxylate oxalate