Selective Ruthenium-Catalyzed N-Alkylation of Indoles by Using Alcohols
作者:Sebastian Bähn、Sebastian Imm、Kathleen Mevius、Lorenz Neubert、Annegret Tillack、Jonathan M. J. Williams、Matthias Beller
DOI:10.1002/chem.200903144
日期:2010.3.22
Alcohols for alkylation! The first homogeneous‐catalyzed N‐alkylations of indoles with aliphatic alcohols proceed under transfer hydrogenation conditions. By the use of the Shvo catalyst and p‐toluenesulfonic acid (PTSA) this atom‐efficient reaction occurs highly selectively with water formed as the only byproduct (see scheme).
successfully established for the synthesis of ketone-substituted indolesbearing 3-methylthioether moiety. The new synthetic approach featured metal-free oxidation and methylthiolation of alcohol-containing indoles, in which new C–S bond and CO bond were formed simultaneously using dimethyl sulfoxide as the sulfur source under the Swern oxidation conditions. The methylthiolation reaction provides a simple and
Asymmetric transfer hydrogenation of heterocycle-containing acetophenone derivatives using N-functionalised [(benzene)Ru(II)(TsDPEN)] complexes
作者:Jonathan Barrios-Rivera、Yingjian Xu、Guy J. Clarkson、Martin Wills
DOI:10.1016/j.tet.2021.132562
日期:2022.1
The application of enantiomerically-pure ruthenium(II) catalysts containing N - functionalised TsDPEN ligand to the asymmetric transferhydrogenation of 15 examples of α-heterocyclic acetophenone derivatives is reported. Products of up to 99% ee were formed.
报道了含有 N-官能化 TsDPEN 配体的对映体纯钌 (II) 催化剂在 15 个 α-杂环苯乙酮衍生物实例的不对称转移氢化中的应用。形成高达 99% ee 的产物。
Stereoselective synthesis of oxazino[4,3-a]indoles employing the oxa-Pictet–Spengler reaction of indoles bearing N-tethered vinylogous carbonate
作者:Santosh J. Gharpure、A. M. Sathiyanarayanan
DOI:10.1039/c0cc05558a
日期:——
A one-pot, sequential 2,3-bis-functionalization of indoles bearing N-tethered vinylogous carbonates employing an intramolecular oxa-PictetâSpengler reaction followed by electrophilic substitution is developed for the stereoselective synthesis of oxazino[4,3-a]indoles.