A versatile, traceless C–H activation-based approach for the synthesis of diversified heterocycles is reported. Rh(III)-catalyzed, N-amino-directed C–H alkenylation generates either olefination products or indoles (in situ annulation) in an atom- and step-economic manner at room temperature. The remarkable reactivity endowed by this directing group enables scale-up of the reaction to a 10 g scale at
DMSO/SOCl<sub>2</sub>-mediated C(sp<sup>2</sup>)–H amination: switchable synthesis of 3-unsubstituted indole and 3-methylthioindole derivatives
作者:Jingran Zhang、Xiaoxian Li、Xuemin Li、Haofeng Shi、Fengxia Sun、Yunfei Du
DOI:10.1039/d0cc07453e
日期:——
The reaction of 2-alkenylanilines with SOCl2 in DMSO was found to selectively afford 3-unsubstituted indoles and 3-methylthioindoles. This switchable approach was found to be temperature-dependent: at room temperature, the reaction afforded 3-unsubstituted indoles through intramolecular cyclization and elimination; while at higher temperature, the reaction gave 3-methylthioindoles via further electrophilic
A novel route to unsymmetrical stilbene derivatives via intramolecular free radical ipso substitution reactions
作者:Christopher R.A. Godfrey、Philip Hegarty、William B. Motherwell、Muhammed K. Uddin
DOI:10.1016/s0040-4039(97)10645-1
日期:1998.2
Unsymmetrical stilbene derivatives can be prepared via intramolecular free radical ipso substitution reactions using suitably constituted vinyl sulfonate and sulfonamide tethering chains.
One-Pot Tandem <i>ortho</i>-Naphthoquinone-Catalyzed Aerobic Nitrosation of <i>N</i>-Alkylanilines and Rh(III)-Catalyzed C–H Functionalization Sequence to Indole and Aniline Derivatives
作者:Tengda Si、Hun Young Kim、Kyungsoo Oh
DOI:10.1021/acs.joc.0c02776
日期:2021.1.1
The nitroso group served as a traceless directing group for the C–H functionalization of N-alkylanilines, ultimately removed after functioning either as an internal oxidant or under subsequent reducing conditions. The unique ability of o-NQ catalysts to aerobically oxidize the N-alkylanilines without using solvents and stoichiometric amounts of oxidants has rendered the new opportunity to develop the
Room-Temperature Palladium-Catalyzed Intramolecular Oxidative Aminocarbonylation of Vinylic C(sp<sup>2</sup>)-H Bonds with Amines and CO
作者:Xu-Heng Yang、Kai Li、Ren-Jie Song、Jin-Heng Li
DOI:10.1002/ejoc.201301284
日期:2014.1
A new, mild route to access 3-methyleneindolin-2-ones is presented that proceeds through a room-temperature, palladium-catalyzedintramolecularoxidative aminocarbonylation of alkenes with amines and CO. This method represents a new aminocarbonylation strategy by employing an oxidative functionalization of a vinyl C(sp2)–H bond.
提出了一种获得 3-亚甲基吲哚-2-酮的新的、温和的途径,该途径通过在室温下钯催化的烯烃与胺和 CO 的分子内氧化氨基羰基化进行。该方法代表了一种新的氨基羰基化策略,通过采用氧化功能化乙烯基 C(sp2)-H 键。