已经描述了钯催化的级联自由基环化和 1,7-烯炔与全氟烷基碘和醇的羰基化反应。该程序使用 1,3,5-三甲酸苯三酯 (TFBen) 作为 CO 源,为构建 3,4-二氢喹啉-2(1 H )-酮骨架提供了一种简便有效的方法。该方法能够将全氟烷基和羰基单元结合到 3,4-二氢喹啉-2(1 H )-one 骨架中,产生各种中等到高浓度的 3,4-二氢喹啉-2(1 H )-one 衍生物产率和出色的E / Z选择性。
Photocatalytic Decarboxylative [2 + 2 + <i>m</i>] Cyclization of 1,7-Enynes Mediated by Tricyclohexylphosphine and Potassium Iodide
作者:Hui-Yuan Liu、Yuan Lu、Yang Li、Jin-Heng Li
DOI:10.1021/acs.orglett.0c03182
日期:2020.11.20
photocatalytic decarboxylative [2 + 2 + m] cyclization of 1,7-enynes with alkyl N-hydroxyphthalimide (NHP) esters, using tricyclohexylphosphine and potassium iodide as redox catalysts, is reported for the construction of functional polycyclic compounds. This protocol tolerates primary, secondary, and tertiary alkyl NHP esters through a single reaction via decarbonylation, radical addition, C–H functionalization
据报道,使用三环己基膦和碘化钾作为氧化还原催化剂,用烷基N-羟基邻苯二甲酰亚胺(NHP)酯进行的1,7-烯炔的新型光催化脱羧[2 + 2 + m ]环化反应。该方案通过脱羰,自由基加成,CH-H官能化和在温和条件下环化的单一反应,可以耐受伯,仲和叔烷基NHP酯。
Cascade Reactions Assisted by Microwave Irradiation: Ultrafast Construction of 2-Quinolinone-Fused γ-Lactones from <i>N</i>-(<i>o</i>-Ethynylaryl)acrylamides and Formamide
作者:Bruce A. L. Sacchelli、Bianca C. Rocha、Leandro H. Andrade
DOI:10.1021/acs.orglett.1c01606
日期:2021.7.2
methodology to construct novel highly functionalized 2-quinolinones from N-(o-ethynylaryl)acrylamides (1,7-enynes) is described for the first time. Microwave irradiation enabled the ultrafast synthesis of 2-quinolinone-fused γ-lactones from Fenton’s reagents in formamide. After six key consecutive reactions, including a diastereoselective step, 2-quinolinone-fused γ-lactones were obtained in good overall
nickel-catalyzed cyclization of N-(o-ethynylaryl)acrylamides for the selective synthesis of dihydrocyclobuta[c]quinolin-3-ones and benzo[b]azocin-2-ones. The two varied products could be easily obtained by tuning the reaction temperature. This reaction features easy temperature-control, high efficiency, and gram-scale synthesis.
我们在本文中描述了镍催化的N -( o -ethynylaryl) 丙烯酰胺环化反应,用于选择性合成二氢环丁[ c ]quinolin-3-ones 和 benzo [ b ]azocin-ones。通过调节反应温度可以很容易地获得两种不同的产物。该反应具有易控温、高效、克级合成等特点。
Photoredox Decarboxylative Alkylation/(2+2+1) Cycloaddition of 1,7‐Enynes: A Cascade Approach Towards Polycyclic Heterocycles Using
<i>N</i>
‐(Acyloxy)phthalimides as Radical Source
作者:José Tiago Menezes Correia、Gustavo Piva da Silva、Elias André、Márcio Weber Paixão
DOI:10.1002/adsc.201900657
日期:2019.12.17
No Abstract
没有摘要
Metal-Free Radical [2+2+1] Carbocyclization of Benzene-Linked 1,<i>n</i>-Enynes: Dual C(sp<sup>3</sup>)H Functionalization Adjacent to a Heteroatom
作者:Ming Hu、Jian-Hong Fan、Yu Liu、Xuan-Hui Ouyang、Ren-Jie Song、Jin-Heng Li
DOI:10.1002/anie.201504603
日期:2015.8.10
A new metal‐free oxidative radical [2+2+1] carbocyclization of benzene‐linked 1,n‐enynes with two C(sp3)H bonds adjacent to the same heteroatom is described. This method achieves two C(sp3)H oxidative functionalizations and an annulation, thus providing efficient and general access to a variety of fused five‐membered carbocyclic hydrocarbons.