A facile protocol for the preparation of 3-bromo-2-thienylzinc bromide A and 5-bromo-2-thienylzinc bromide B has been developed. It has been successfully accomplished by a site-selective oxidative addition of active zinc into a chemically pseudo-equivalent or equivalent carbon–bromine bond, respectively. The subsequent cross-coupling reactions of the organozincs were also successfully carried out under mild conditions providing the corresponding products in moderate to high yields.

中文翻译：

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活性锌在二溴噻吩的碳-溴键中的位点选择性单氧化加成：噻吩锌试剂的制备及其应用

已经开发了用于制备3-溴-2-噻吩基溴化锌A和5-溴-2-噻吩基溴化锌B的简便方案。它是通过将活性锌分别选择性地氧化成化学假等价或等价的碳-溴键而成功完成的。有机锌的后续交叉偶联反应也已在温和条件下成功进行，从而以中等至高收率提供了相应的产物。