Merck, 221775-5G, Copper(II) bromide

General description
Cuprous bromide may be prepared by the reduction of cupric bromide or CuSO₄-NaBr. In the molten state, it is grayish brown /greenish brown in color.
Application
Some reported applications of copper bromide are:
catalyst in cross coupling reactions.
co-catalyst in Sonogashira coupling.
Lewis acid in enantioselective addition of alkynes.
reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.

Reductive homocoupling of α-bromo- α- chlorocarboxylates to dimethyl α, α′ dichlorosuccinate derivatives in presence of CuBr/LiOCH₃ in methanol has been reported.