[EN] TETRAHYDROISOQUINOLINE COMPOUNDS AND THEIR USE AS PYRUVATE DEHYDROGENASE KINASE INHIBITORS [FR] COMPOSÉS TÉTRAHYDROISOQUINOLÉINE ET LEUR UTILISATION EN TANT QU'INHIBITEURS DE LA PYRUVATE DÉSHYDROGÉNASE KINASE
Enantioselective synthesis of tunable chiral pyridine–aminophosphine ligands and their applications in asymmetric hydrogenation
作者:Youran Liu、Fei Chen、Yan-Mei He、Chenghao Li、Qing-Hua Fan
DOI:10.1039/c9ob00770a
日期:——
ligands were enantioselectively synthesized based on chiral 2-(pyridin-2-yl)-substituted 1,2,3,4-tetrahydroquinoline scaffolds, which were obtained in high yields and with excellent enantioselectivities via ruthenium-catalyzed asymmetric hydrogenation of 2-(pyridin-2-yl)quinolines. The protocol features a wide substrate scope and mild reaction conditions, enabling scalable synthesis. These chiral
基于手性2-(吡啶-2-基)-取代的1,2,3,4-四氢喹啉骨架,对映选择性地合成了一个可调谐的手性吡啶-氨基膦配体的小型文库,该文库以高收率和优异的对映选择性通过钌催化的2-(吡啶-2-基)喹啉不对称氢化。该方案具有广泛的底物范围和温和的反应条件,可实现可扩展的合成。这些手性P,N配体已成功应用于Ir催化的基准烯烃和具有挑战性的七元环亚胺(包括苯并ze庚因和苯并二氮杂卓)的不对称加氢反应。在2,4-二芳基-3 H-苯并[ b ]氮杂和2,4-不对称氢化反应中,具有出色的对映和非对映选择性(高达99%ee和> 20:1 dr)和/或前所未有的化学选择性。二芳基-3 H-苯并[ b ] [1,4]二氮杂pine。
Iron catalyzed cross coupling reactions of aromatic compounds
申请人:——
公开号:US20030220498A1
公开(公告)日:2003-11-27
A process for the production of compounds Ar—R
1
by means of a cross-coupling reaction of an organometallic reagent R
1
—M with an aromatic or heteroaromatic substrate Ar—X catalyzed by one or several iron salts or iron complexes as catalysts or pre-catalysts, present homogeneously or heterogeneously in the reaction mixture. This new invention exhibits substantial advantages over established cross coupling methodology using palladium- or nickel complexes as the catalysts. Most notable aspects are the fact that (i) expensive and/or toxic nobel metal catalysts are replaced by cheap, stable, commercially available and toxicologically benign iron salts or iron complexes as the catalysts or pre-catalysts, (ii) commercially attractive aryl chlorides as well as various aryl sulfonates can be used as starting materials, (iii) the reaction can be performed under “ligand-free” conditons, and (iv) the reaction times are usually very short.
Metal–Ligand Cooperative Approach To Achieve Dehydrogenative Functionalization of Alcohols to Quinolines and Quinazolin-4(3<i>H</i>)-ones under Mild Aerobic Conditions
作者:Siuli Das、Suman Sinha、Deepannita Samanta、Rakesh Mondal、Gargi Chakraborty、Paula Brandaõ、Nanda D. Paul
DOI:10.1021/acs.joc.9b01343
日期:2019.8.16
under relatively mild reaction conditions (≤90 °C) is reported. Simple and easy-to-prepare air-stable Cu(II) complexes featuring redox-active azo-aromatic scaffolds, 2-arylazo-(1,10-phenanthroline) (L1,2), are used as catalyst. A wide variety of substituted quinolines and quinazolin-4(3H)-ones were synthesized in moderate to good isolated yields via dehydrogenative coupling reactions of various inexpensive
Reaction condition controlled nickel(<scp>ii</scp>)-catalyzed C–C cross-coupling of alcohols
作者:Meng-Juan Zhang、Hong-Xi Li、David J. Young、Hai-Yan Li、Jian-Ping Lang
DOI:10.1039/c9ob00418a
日期:——
methodology employing a Ni(II) 4,6-dimethylpyrimidine-2-thiolate cluster catalyst under different reaction conditions. This catalyst could tolerate a wide range of substrates and exhibited a high activity for the annulation reaction of secondary alcohols with 2-aminobenzyl alcohols to yield quinolines. This work is an example of precise chemoselectivity control by careful choice of reaction conditions.
Synthesis of Polysubstituted Quinolines from α-2-Aminoaryl Alcohols Via Nickel-Catalyzed Dehydrogenative Coupling
作者:Sanju Das、Debabrata Maiti、Suman De Sarkar
DOI:10.1021/acs.joc.7b03198
日期:2018.2.16
This study reports a nickel-catalyzed sustainable synthesis of polysubstitutedquinolines from α-2-aminoaryl alcohols by a sequential dehydrogenation and condensation process that offers the advantages of a low catalyst loading and wide substrate scope. In contrast to earlier reported methods, this strategy allows the use of both primary as well as secondary α-2-aminoaryl alcohols in combination with