Accessing the amide functionality by the mild and low-cost oxidation of imine
摘要:
Oxidation of imines using sodium chlorite under buffered conditions gave the corresponding amides in good to high yield. The reaction was generally fast and was completed within 5-40 min. As has been established in the corresponding oxidation of aldehyde, so-called Pinnick oxidation, the good functional group tolerance and the use of inexpensive reagents are the advantages of this protocol. (C) 2009 Elsevier Ltd. All rights reserved.
Visible-Light-Induced Radical Acylation of Imines with α-Ketoacids Enabled by Electron-Donor–Acceptor Complexes
作者:Hong-Hao Zhang、Shouyun Yu
DOI:10.1021/acs.orglett.9b01169
日期:2019.5.17
radical acylation of imines with α-ketoacids has been achieved, enabled by an electron-donor–acceptor (EDA) complex. This EDA complex-mediated process eradicates the use of a photocatalyst. Visiblelight is used as the sole promoter for this reaction, and CO2 is the only side product. Substrates with amide, cyanide, ester, ether, halides, and heterocycles were compatible. This radical acylation allows
Enantioselective Annulation Reactions of Bisenolates Prepared Through Dearomatization Reactions of Aromatic and Heteroaromatic Diesters
作者:Jaime Pérez-Vázquez、Alberte X. Veiga、Gustavo Prado、F. Javier Sardina、M. Rita Paleo
DOI:10.1002/ejoc.201101427
日期:2012.2
A one-pot, enantioselective strategy for the dearomatization–annulation of aromaticdiesters to give a range of highly functionalized polycyclic molecules with excellent enantioselectivity is presented. This methodology is based on the reaction of bisenolates, prepared by treating aromaticdiesters with trialkyltin lithium reagents, which involves a stanna-Brook rearrangement, with 1,ω-dihaloalkanes
Dearomative Photocatalytic Construction of Bridged 1,3‐Diazepanes
作者:Jamie A. Leitch、Tatiana Rogova、Fernanda Duarte、Darren J. Dixon
DOI:10.1002/anie.201914390
日期:2020.3.2
discovery programmes and natural product synthesis. Herein, we report the photocatalytic construction of 2,7-diazabicyclo[3.2.1]octanes (bridged 1,3-diazepanes) via a reductive diversion of the Minisci reaction. The fused tricyclic product is proposed to form via radical addition to the C4 position of 4-substituted quinoline substrates, with subsequent Hantzsch ester-promoted reduction to a dihydropyridine
Catalytic Asymmetric Pictet–Spengler-Type Reaction for the Synthesis of Optically Active Indolo[3,4-<i>cd</i>][1]benzazepines
作者:Dao-Juan Cheng、Hai-Bian Wu、Shi-Kai Tian
DOI:10.1021/ol202361t
日期:2011.10.21
A new strategy has been introduced to develop a catalyticasymmetric Pictet–Spengler-type reaction by replacing the aldehyde with an imine. A range of 4-(2-aminoaryl)indoles smoothly undergo the chiral phosphoric acid catalyzed asymmetric Pictet–Spengler-type reaction with imines at room temperature to give structurally diverse indolo[3,4-cd][1]benzazepines in good to excellent yields and ee.
已经引入了一种新的策略,以通过用亚胺代替醛来开发催化不对称的Pictet-Spengler型反应。一系列4-(2-氨基芳基)吲哚在室温下与亚胺平稳地进行手性磷酸催化的不对称Pictet-Spengler型反应,得到结构良好的吲哚[3,4- cd ] [1]苯并ze庚因产量和ee。
Ni-Catalyzed Coupling of Butadiene, Aldimines, and Arylboronic Acids to Homoallylic Amines under Base-Free Conditions
作者:Yu-Qing Li、Shi-Liang Shi
DOI:10.1021/acs.organomet.1c00096
日期:2021.7.26
three-component coupling of butadiene, aldimines, and arylboronic acids to form synthetically important homoallylic amines. The starting materials are stable and readily available; especially, butadiene is an abundant chemical feedstock. This protocol provides rapid access to various (E)-homoallylic amines with excellent regio- and stereoselectivity by constructing two C–C bonds simultaneously. The mild
在此,我们报告了镍催化的丁二烯、醛亚胺和芳基硼酸的三组分偶联,以形成合成重要的高烯丙基胺。原料稳定且容易获得;尤其是丁二烯是一种丰富的化学原料。该协议通过同时构建两个 C-C 键,提供了对具有出色区域和立体选择性的各种 ( E )-高烯丙基胺的快速访问。温和且无碱的反应条件为醛亚胺和芳基硼酸偶联部分提供了广泛的底物范围和高官能团耐受性。