ethyl 3-chloro-5-hydroxypyridine-2-carboxylate 、
((1R)-2,2-difluorocyclopropyl)methyl 4-nitrobenzenesulfonate 以in the same manner as in Example 5, the title compound was obtained的产率得到ethyl 3-chloro-5-(((1R)-2,2-difluorocyclopropyl)methoxy)pyridine-2-carboxylate