Perfluoro-and polyfluorosulfonic acids. 21. Synthesis of difluoromethyl esters using fluorosulfonyldifluoroacetic acid as a difluorocarbene precursor

~45%

~47%

~46%

~47%

~47%

~49%

~47%

~43%

~40%

~38%

~40%

~40%

~42%

~41%

~40%

~32%

~33%

~30%

~29%

~19%

~20%