我们在此报告了一种有效且实用的策略,用于通过t -BuOK 催化的官能化喹唑啉酮的分子内加氢胺化反应在极其温和的反应下制备 5 H -酞嗪基[1,2- b ]喹唑啉-8(6 H )-酮衍生物情况。多种喹唑啉酮底物具有良好的耐受性,可通过独特的 6 -exo-dig环化工艺以高产率提供相应的产品。本协议具有易于获得的起始材料、广泛的底物范围以及高区域和立体选择性的优点。
bioinsipred gold‐catalyzed tandem Diels–Alder/Diels–Alderreaction of an enynal and a 1,3‐diene, forming the highly‐strained benzotricyclo[3.2.1.02,7]octane skeleton, was reported. In contrast, a Diels–Alder/Friedel–Crafts tandem reaction occurred instead when silver salts were used as the catalyst. Although both reactions experienced the similar Diels–Alderreaction of a pyrylium intermediate with a
Metal/Benzoyl Peroxide (BPO)-Controlled Chemoselective Cycloisomerization of (<i>o</i>-Alkynyl)phenyl Enaminones: Synthesis of α-Naphthylamines and Indeno[1,2-<i>c</i>]pyrrolones
作者:Fangfang Zhang、Zhengchen Qin、Lingkai Kong、Yulei Zhao、Yuanyuan Liu、Yanzhong Li
DOI:10.1021/acs.orglett.6b02615
日期:2016.10.7
tandem reactions for the synthesis of α-naphthylamines and indeno[1,2-c]pyrrolones starting from (o-aklynyl)phenyl enaminones are described. When reactions were carried out in N,N-dimethylformamide (DMF) using a AgNO3 catalyst, α-naphthylamines were obtained in up to 89% isolated yields within 2 h. Whereas indeno[1,2-c]pyrrolones were produced in high isolated yields in the presence of benzoyl peroxide
描述了涉及化学选择性串联反应的合成方法,用于从(邻-炔基)苯基烯胺酮开始合成α-萘胺和茚并[1,2- c ]吡咯烷酮。当使用AgNO 3催化剂在N,N-二甲基甲酰胺(DMF)中进行反应时,在2小时内以高达89%的分离产率获得了α-萘胺。而在过氧化苯甲酰(BPO)和CuCl催化下,高分离产率生产茚并[1,2- c ]吡咯烷酮。
An Efficient Route to Polysubstituted Tetrahydronaphthols: Silver-Catalyzed [4+2] Cyclization of 2-Alkylbenzaldehydes and Alkenes
Silver bullet: A methodology for stereoselectivesynthesis of polysubstituted tetrahydronaphthols catalyzed by [Ag+]/NPO has been developed. The reactions proceeded through an unprecedented [4+2] cyclization of 2‐(2‐formylphenyl)ethanone and an alkene, in both inter‐ and intramolecular fashion. NPO=pyridine N‐oxide.
Palladium-Catalyzed Cascade Decarboxylative Amination/6-<i>endo-dig</i> Benzannulation of <i>o</i>-Alkynylarylketones with <i>N</i>-Hydroxyamides To Access Diverse 1-Naphthylamine Derivatives
An efficient and practical one-pot strategy to produce highly substituted 1-naphthylamines via sequential palladium-catalyzed decarboxylative amination/intramolecular 6-endo-dig benzannulation reactions has been described. In this reaction, a broad range of electron-rich, electron-neutral, and electron-deficient o-alkynylarylketones react well with N-hydroxyl aryl/alkylamides to give a diversity of
Facile Assembly of Fused Isoquinolines by Gold(I)-Catalyzed Coupling-Cyclization Reactions between o-Alkynylbenzaldehydes and Aromatic Amines Containing Tethered Nucleophiles
作者:Nitin T. Patil、Anil Kumar Mutyala、Pediredla G. V. V. Lakshmi、Penmatcha V. K. Raju、Balasubramanian Sridhar
DOI:10.1002/ejoc.200901364
日期:2010.4
A gold(I)-catalyzed, operationally simple coupling-cyclization technique was developed for the synthesis of isoquinoline-fused polycyclic compounds. The reaction makes use of two coupling partners such as o-alkynylbenzaldehydes and aromaticamines having tetherednucleophiles. The reaction is easy to perform, broad in scope, and allows the generation of a number of biologically important heterocyclic