Ruthenium-catalyzed direct C3 alkylation of indoles with α,β-unsaturated ketones
作者:Shuai-Shuai Li、Hui Lin、Xiao-Mei Zhang、Lin Dong
DOI:10.1039/c4ob02124j
日期:——
paper, a simple and highly efficient ruthenium-catalyzed direct C3 alkylation of indoles with various alpha,beta-unsaturated ketones without chelation assistance has been developed. This novel C-H activation methodology exhibits a broad substrate scope such as different substituted indoles, pyrroles, and other azoles. Further synthetic applications of the alkylation products can lead to more attractive
Pd-catalyzed intramolecular C–H addition of indoles bearing cyanohydrin components at the C(3), C(2), and N(1) positions to nitriles is described. A wide range of functionalized partially saturated carbazoles, tetrahydropyrido[1,2-a]indole, and carbazoles can be prepared in good to excellent yields under the optimal conditions. In addition, fused polycyclic indoles with seven- or eight-membered rings
描述了钯催化分子内C–H加成腈在腈C(3),C(2)和N(1)位置上带有氰醇成分的第一个例子。可以在最佳条件下以良好或优异的收率制备各种官能化的部分饱和咔唑,四氢吡啶并[1,2- a ]吲哚和咔唑。另外,也可以平滑地形成具有七元或八元环的稠合多环吲哚。
Aerobic Oxidative Coupling between Carbon Nucleophiles and Allylic Alcohols: A Strategy to Construct β-(Hetero)Aryl Ketones and Aldehydes through Hydrogen Migration
reaction: A highly efficient PdII‐catalyzed intermolecular oxidative‐coupling reaction is reported, inspired by the fundamental Heck and Wacker processes. The (hetero)aryl‐PdX species, originating from CHactivation step or desulfonyl hydrazides, coupled with allylic alcohols by using oxygen as the sole oxidant (see scheme).
The reaction of indole derivatives bearing a 3- or 4-hydroxyalkyl chain with dimethyl sulfoxide and oxalyl chloride under Swern conditions led to a one-pot process involving three different synthetic transformations, namely oxidation of indole to oxindole, introduction of a chlorine substituent at the oxindole C-3 position, and substitution of the hydroxyl group in the side chain by chlorine. In spite
Efficient, one-pot transformation of indoles into functionalized oxindole and spirooxindole systems under Swern conditions
作者:Pilar López-Alvarado、Judith Steinhoff、Sonia Miranda、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1016/j.tet.2008.12.029
日期:2009.2
and oxalyl chloride under Swern conditions led to a one-pot, three-component process involving three different synthetic transformations, namely oxidation of indole to oxindole, introduction of a chlorine substituent at the oxindole C-3 position and substitution of the hydroxyl group in the side chain by chlorine, in good to excellent overall yields. The same conditions, applied to a 2-methylindole, afforded