作者:Lezhen Li、Peijie Cai、Qingxiang Guo、Song Xue
DOI:10.1021/jo800231s
日期:2008.5.1
and highly efficient method for the rearrangement of bromohydrins mediated by Et2Zn to synthesize carbonyl compounds was described. Various β-bromo alcohols were treated with 0.6 equiv of Et2Zn to form a zinc complex in CH2Cl2 at room temperature for 2 h, followed by 1,2-migration to give the corresponding carbonyl compounds. This remarkable and clean rearrangement is general for acyclic and cyclic bromohydrins
描述了一种简单高效的方法,用于重排由Et 2 Zn介导的溴代醇以合成羰基化合物。用0.6当量的Et 2 Zn处理各种β-溴代醇,在CH 2 Cl 2中形成锌络合物在室温下反应2小时,然后进行1,2-迁移,得到相应的羰基化合物。对于无环和环状的溴代醇,这种显着且清洁的重排是普遍的,并且根据起始的溴代醇的特征,以良好或优异的收率获得了各种环膨胀和收缩的羰基化合物。该反应中有机锌试剂的官能团耐受性将用于有机合成中。还研究了这种重排过程的范围和局限性。