Kinetic Resolution of Activated Nitroallylic Acetates with Aldehydes and Ketones through a Conjugate Addition-Elimination SN2′ Process
作者:Raju Jannapu Reddy、Pei-Hsun Lee、Dhananjay R. Magar、Jung-Hsuan Chen、Kwunmin Chen
DOI:10.1002/ejoc.201101162
日期:2012.1
A unique organocatalytic kineticresolution (KR) of nitroallylicacetates has been developed. A variety of racemic nitroallylicacetates (1a–n) were resolved with chiral enamines formed in situ from the reaction of aldehydes and ketones with organocatalyst 2b (2.5 mol-%) and 14c (20 mol-%), respectively, through an interesting SN2′ reaction. The densely functionalized products 3–5 were obtained with
Construction of benzo[a]carbazole derivatives via Diels–Alder reaction of arynes with vinylindoles
作者:Lijun Wu、Hui Huang、Pan Dang、Yun Liang、Shaofeng Pi
DOI:10.1039/c5ra11025d
日期:——
A new protocol for a highly efficienct and versatile Diels–Alder reaction of vinylindoles with arynes (generated form 2-(trimethylsilyl)aryl triflate) has been developed. Various functionalized benzo[a]carbazoles were afforded in good to perfect yields via [4 + 2] cycloaddition/aromatization.
已经开发出一种新的协议,用于乙烯基吲哚与芳烃的高效狄斯-阿尔德反应(生成形式为2-(三甲基甲硅烷基)芳基三氟甲磺酸酯)。通过[4 + 2]环加成/芳构化,可以提供各种官能化的苯并[ a ]咔唑,收率良好至理想。
1-Phenyl-azepinoindoles
申请人:Sandoz Ltd.
公开号:US04478750A1
公开(公告)日:1984-10-23
A 1,2,3,4,5,6-hexahydro-6-phenyl-azepino[4,5-b]indole, or a pharmaceutically acceptable acid addition salt thereof is a useful neuroleptic, anti-depressant and anti-allergic agent.
Facile and highly efficient method for the C-alkylation of 2-hydroxy-1,4-naphthoquinone to nitroalkenes under catalyst-free ‘on water’ conditions
作者:Deepak Kumar Barange、Veerababurao Kavala、B. Rama Raju、Chun-Wei Kuo、Chi Tseng、Yu-Chen Tu、Ching-Fa Yao
DOI:10.1016/j.tetlet.2009.06.107
日期:2009.9
C-Alkylation of 2-hydroxy-1,4-naphthoquinone to various nitroolefins was achieved under catalyst-free employing 'on water' conditions. The mechanism for the formation can be explained oil the basis of dual activation of nitroalkene and 2-hydroxy-1,4-naphthoquinones via hydrogen bonding. Simple reaction conditions, high yields of the products, and environmentally benign medium are attractive features of this method. (C) 2009 Elsevier Ltd. All rights reserved.
A Highly Regio- and Diastereoselective Four-Component Reaction to Construct Polycyclic Bispiroindolines from 2-Isocyanoethylindoles and Isocyanates
作者:Longhai Li、Jiaxin Liu、Min Shi
DOI:10.1021/acs.orglett.8b03019
日期:2018.11.16
one-pot multicomponent domino reaction between 2-isocyanoethylindoles and isocyanates for the diastereoselective construction of polycyclic bispiroindolines was developed. Fused polycyclic bispiroindolines containing two contiguous spiral atoms were afforded in moderate to good yields with excellent regio- and diastereoselectivities through a four-component Ugi-type reaction (U-4CR) under mild conditions