Synthesis of boronic ester and acid compounds

Details Synthesis of boronic ester and acid compounds Synthesis of boronic ester and acid compounds

C - Chemistry, Metallurgy

07

F

C07F 5/05 (2006.01) C07F 5/02 (2006.01)

Patent

CA 2738706

A process for the preparation of a cyclic trimeric boronic acid anhydride of formula (XXIV): (see formula XXIV) wherein a compound of formula (XIV): (see formula XIV) or a boronic acid anhydride thereof, is extracted into dichloromethane, the solvent is exchanged to ethyl acetate, and the compound of formula (XIV), or a boronic acid anhydride thereof, is crystallized by addition of hexane or heptane. A process for a large-scale process for forming a compound of formula (XIV) or a boronic acid anhydride thereof.

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