How is Potassium trifluoro(methoxymethyl)borate(1-) (CAS: 910251-11-5) typically synthesized?

Potassium trifluoro(methoxymethyl)borate(1-) is typically synthesized by the reaction of potassium fluoride with trifluoromethoxymethylborane in the presence of a suitable base. The process involves the generation of the borate salt, which can be purified and crystallized. The reaction is highly exothermic and requires careful temperature control to achieve high yield and selectivity.