Ni-Catalyzed Reductive Coupling of Electron-Rich Aryl Iodides with Tertiary Alkyl Halides
作者:Xuan Wang、Guobin Ma、Yu Peng、Chloe E. Pitsch、Brenda J. Moll、Thu D. Ly、Xiaotai Wang、Hegui Gong
DOI:10.1021/jacs.8b09473
日期:2018.10.31
This work illustrates the reductive coupling of electron-richaryl halides with tertiary alkyl halides under Ni-catalyzed cross-electrophile coupling conditions, which offers an efficient protocol for the construction of all carbon quaternary stereogenic centers. The mild and easy-to-operate reaction tolerates a wide range of functional groups. The utility of this method is manifested by the preparation
这项工作说明了富电子芳基卤化物与叔烷基卤化物在 Ni 催化的交叉亲电偶联条件下的还原偶联,为构建所有碳四元立体中心提供了有效的方案。温和且易于操作的反应可耐受广泛的官能团。该方法的实用性通过环色胺衍生物的制备得到证明,其中成功掺入 7-吲哚基部分特别令人感兴趣,因为许多天然产物由这些关键支架组成。已经进行了 DFT 计算以研究提议的自由基链和双氧化加成途径,这为在溶液中发生的反应部分提供了有用的机理见解。
Effects of ring size on the reactions of cyclic olefins
作者:J.G. Traynham、O.S. Pascual
DOI:10.1016/s0040-4020(01)93183-7
日期:1959.1
methylenecycloalkanes (ringsizes C4 through C7) gave mixtures of chlorohydrins with abnormal orientation predominating with the 4- and 6-membered ring compounds. Addition of HOBr to these olefins gave 1-bromocycloalkylmethanols as the only bromohydrin product. Cycloalkanecarboxaldehyde, in amounts dependent on ringsize, accompanied the formation of bromohydrin fromolefin oxide and HBr solution.
A simple efficient, stereoselective, and regioselective method for the synthesis of beta-chlorohydrins, beta-bromohydrins, and beta-iodohydrins by the direct opening of 1,2-epoxides with the corresponding ammonium halide in acetonitrile, in the presence of metal salts. is described. This new method appears to be of general use and competitive with the other methods previously reported.
Tiffeneau; Tchoubar, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1938, vol. 207, p. 918
作者:Tiffeneau、Tchoubar
DOI:——
日期:——
Tchoubar, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1941, vol. 212, p. 195