A new convenient preparation of samarium dibromide in THF is reported. Pinacolcoupling reactions using SmBr2 in catalytic amounts together with mischmetall as a coreductant have been performed with a variety of carbonylcompounds.
SmI2-promoted cross coupling reaction of N-2-bromoethylphthalimide and carbonyl compounds: Synthesis of α-aryl-α′-hydroxy ketones
作者:Jorge González-Rodríguez、Martín Soto、Raquel G. Soengas、Humberto Rodríguez-Solla
DOI:10.1016/j.tet.2019.130839
日期:2020.1
In this paper, we have disclosed the SmI2-mediated carbonyl-imide reductive cross coupling between N-2-bromoethylphthalimide and different aldehydes and ketones in the presence of anhydrous catalytic NiI2. This methodology provided an effective tool to prepare α-aryl-α′-hydroxy ketones under mild conditions which can be applied to various functionalized, aliphatic and aromatic aldehydes and ketones
Some organic reactions promoted by samarium diiodide
作者:J. Souppe、L. Danon、J.L. Namy、H.B. Kagan
DOI:10.1016/0022-328x(83)85053-0
日期:1983.7
Various homoallylic alcohols and homobenzylic alcohols were prepared by the reaction between aldehydes and allylic or benzylic halides in the presence of samariumdiiodide. This iodide is also a very good reagent for formation of pinacols from aldehydes or ketones. The reactions are especially fast and selective in the case of substituted benzaldehydes. The reactivities of various nitrogen functional
Allylic phosphates allylate ketones and aldehydes in the presence of samarium(II) iodide. The coupling proceeds with the preservation of the olefin geometry, however, regio- and stereoselectivity are not high.