2-cyclohexyl-2-[2-(2,6-dimethoxy-pyridin-3-yl)-5,6-difluoro-benzoimidazol-1-yl]-ethanol 、
6-羟基烟酸甲酯 、
偶氮二甲酸二叔丁酯 在
6-{2-cyclohexyl-2-[2-(2,6-dimethoxy-pyridin-3-yl)-5,6-difluoro-benzoimidazol-1-yl]-ethoxy}-nicotinic acid methyl ester 、 crude product 、 silica gel 、 ethyl acetate heptane 作用下,
以to give the desired compound as a white solid (4%)的产率得到6-{2-cyclohexyl-2-[2-(2,6-dimethoxy-pyridin-3-yl)-5,6-difluoro-benzoimidazol-1-yl]-ethoxy}-nicotinic acid methyl ester