Rh-Catalyzed oxidative C–H activation/annulation: converting anilines to indoles using molecular oxygen as the sole oxidant
作者:Guoying Zhang、Hui Yu、Guiping Qin、Hanmin Huang
DOI:10.1039/c3cc49751h
日期:——
A practical and efficient Rh(III)-catalyzed aerobic C-Hactivation has been developed for the facile synthesis of a broad range of indoles from simple anilines and alkynes. The protocol could be conducted under mild conditions and used environmentally friendly oxygen as the sole clear oxidant.
Iridium‐Catalyzed Oxidative Annulation of 2‐Arylindoles with Benzoquinone Leading to Indolo[1,2‐
<i>f</i>
]phenanthridin‐6‐ols
作者:Shenghai Guo、Yangfan Liu、Xinying Zhang、Xuesen Fan
DOI:10.1002/adsc.202000449
日期:2020.7.29
An iridium‐catalyzedoxidative [4+2] annulation reaction of 2‐arylindoles using quinone derivatives as C2 synthons has been developed. From this reaction, a series of diversely substituted indolo[1,2‐f ]phenanthridine derivatives were synthesized in an efficient manner. Moreover, diverse transformations of the phenanthridine derivatives thus obtained have also been performed, which showcase the synthetic
已经开发了使用醌衍生物作为C2合成子的2-芳基吲哚的铱催化的[4 + 2]氧化环化反应。通过该反应,可以有效地合成一系列不同取代的吲哚[1,2- f ]菲啶衍生物。此外,还进行了由此获得的菲啶衍生物的各种转化,这证明了本方案的合成潜力。
Phosphine-free thiopseudourea-Pd(II) complex catalyzed Larock heteroannulation of 2-haloamines with internal alkynes
We examined the Pd-catalyzed heteroannulation of 2-haloamines with internal alkynes under phosphine-free conditions. The thiopseudourea palladium(II) complex (5) found to be an efficient catalyst for the Pd induced heteroannulation. Achieved high turnover number for the heteroannulation reactions of internal alkynes with 2-iodoaniline. A variety of 2-bromoanilines and N-tosyl substituted 2-bromoanilines
The regioselective Larock indole synthesis catalyzed by NHC–palladium complexes
作者:Pan He、Yufeng Du、Gang Liu、Changsheng Cao、Yanhui Shi、Juan Zhang、Guangsheng Pang
DOI:10.1039/c3ra42788a
日期:——
The first practical and regioselective process for the synthesis of 2,3-disubstituted indoles from the reaction of o-iodoanilines or o-bromoanilines and their derivatives with symmetrical and unsymmetrical internal alkynes catalyzed by a ferrocene-functionalized N-heterocyclic carbene (NHC)âpalladium complex has been developed, and the indoles were isolated in good yields with high regioselectivity.