How is methyl diethylborinate (CAS: 7397-46-8) typically synthesized?

Methyl diethylborinate (CAS: 7397-46-8) is typically synthesized via the reaction of boron tribromide with a mixture of diethylamine and methylamine. The reaction is exothermic and requires careful temperature control to achieve high yield and selectivity. Commonly, this involves the stepwise addition of the amines to the boron reagent in the presence of a solvent like chlorobenzene.