Highly Enantioselective Synthesis of Indolines: Asymmetric Hydrogenation at Ambient Temperature and Pressure with Cationic Ruthenium Diamine Catalysts
作者:Zhusheng Yang、Fei Chen、Yanmei He、Nianfa Yang、Qing-Hua Fan
DOI:10.1002/anie.201607890
日期:2016.10.24
asymmetric hydrogenation of 1H‐indoles and 3H‐indoles at ambient temperature and pressure, catalyzed by chiral phosphine‐free cationic ruthenium complexes, has been developed. Excellent enantio‐ and diastereoselectivities (up to >99 % ee, >20:1 d.r.) were obtained for a wide range of indolederivatives, including unprotected 2‐substituted and 2,3‐disubstituted 1H‐indoles, as well as 2‐alkyl‐ and 2‐aryl‐substituted
We have developed a highly efficient and practical strategy for the kinetic resolution of indoline derivatives, involving a chiral Brønstedacid-catalyzed iminium ion formation and asymmetric transfer hydrogenation cascade process. The kinetic resolution allows the synthesis of 2-substituted N-benzylindolines in good yields with moderate to excellent enantioselectivities.
Asymmetric Synthesis of Indolines by Catalytic Enantioselective Reduction of 3<i>H</i>-Indoles
作者:Magnus Rueping、Claus Brinkmann、Andrey P. Antonchick、Iuliana Atodiresei
DOI:10.1021/ol1019234
日期:2010.10.15
A highly enantioselective metal-free reduction of 3H-indoles has been developed. This Brønsted acid catalyzed transfer hydrogenation of indolederivatives with Hantzsch dihydropyridine as the hydrogen source constitutes an efficient method for the synthesis of various optically active indolines with high enantioselectivities.
Light-driven redox deracemization of indolines and tetrahydroquinolines using a photocatalyst coupled with chiral phosphoric acid
作者:Qipeng Chen、Yuanli Zhu、Xujing Shi、Renfu Huang、Chuang Jiang、Kun Zhang、Guohua Liu
DOI:10.1039/d2sc06340a
日期:——
The integration of oxidation and enantioselective reduction enables a redox deracemization to directly access enantioenriched products from their corresponding racemates. However, the solution of the kinetically microscopic reversibility of substrates used in this oxidation/reduction unidirectional event is a great challenge. To address this issue, we have developed a light-driven strategy to enable
An asymmetric synthesis of indolines has been described by using an Ir-catalyzed asymmetrichydrogenation of 2-aryl-3H-indoles with unsymmetrical hybrid chiral phosphine-phosphoramidite ligands. The result indicated that the catalytic performance could be significantly improved by the H8-binaphthyl moiety on this ligand motif. This method is characterized by a high asymmetric induction and a reasonable
通过使用不对称杂化手性膦-亚磷酰胺配体对 2-芳基-3 H-吲哚进行 Ir 催化不对称氢化,描述了二氢吲哚的不对称合成。结果表明,该配体基序上的H 8 -联萘基部分可以显着提高催化性能。该方法具有高度不对称诱导和合理的官能团耐受性的特点,从而为手性二氢吲哚及其衍生物提供了一种简洁有效的方法,其ee高达94%。