(S)-2-Methyl-propane-2-sulfinic acid {1-[3-(tert-butyl-dimethyl-silanyloxy)-2,4-difluoro-phenyl]-2-pyridin-4-yl-ethyl}-amide 、
四丁基氟化铵 以to give (S)-2-methyl-propane-2-sulfinic acid [1-(2,4-difluoro-3-hydroxy-phenyl)-2-pyridin-4-yl-ethyl]-amide (480 mg) as a pale yellow solid的产率得到(S)-2-methyl-propane-2-sulfinic acid [1-(2,4-difluoro-3-hydroxy-phenyl)-2-pyridin-4-yl-ethyl]-amide