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