(7R,8R,9R)-3-chloro-7-(2-methoxyethoxy)-2-methyl-9-phenyl-8-pivaloyloxy-7H-8,9-dihydro-pyrano[2,3-c]imidazo[1,2-a]pyridine 在
甲醇 、
potassium carbonate 作用下,
反应 18.0h,
以78%的产率得到(7R,8R,9R)-3-chloro-8-hydroxy-7-(2-methoxyethoxy)-2-methyl-9-phenyl-7H-8,9-dihydro-pyrano[2,3-c]imidazo[1,2-a]pyridine