Science of Synthesis

Schall, A.; Reiser, O., Science of Synthesis, (2007) 25, 608.

The only sufficiently stable acid halide of formic acid is the fluoride, which was prepared in 1934 from anhydrous formic acid, potassium fluoride, and benzoyl chloride, albeit in a low yield of 16%.[‌10‌] The protocol was later improved by directly reacting benzoyl fluoride with formic acid.[‌11‌] Further improvements were disclosed, allowing the preparation of formyl fluoride on a large scale either from formic acid (employing potassium hydrogen fluoride as the fluorinating agent),[‌12‌] from acetic formic anhydride,[‌12‌] or from cyanuric fluoride.[‌13‌]

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References

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• 8.Meeeee-Meee, (8888) M 8, 88.