Facile Synthesis of 1-(Isoquinolin-1-yl)ureas by Silver Triflate Catalyzed Tandem Reactions of 2-Alkynylbenzaldoximes with Carbodiimides
作者:Shengqing Ye、Huanhuan Wang、Jie Wu
DOI:10.1002/ejoc.201001040
日期:2010.11
2-Alkynylbenzaldoximes react with carbodiimides under mild conditions and silver triflate catalysis in DMF, leading to a diverse range of 1-(isoquinolin-1-yl)ureas in good to excellent yields. This transformation involves tandem 6-endo cyclization, [3+2] cycloaddition, and subsequent rearrangement.
An Efficient Synthesis of 3-Substituted Isoquinoline and Pyridine Derivatives by Gold Catalyzed Intramolecular Cyclization from<i>o</i>-Alkynyloximes
作者:K. P. V. Subbarao、G. Raveendra Reddy、A. Muralikrishna、K. V. Reddy
DOI:10.1002/jhet.2109
日期:2014.7
A one‐pot reaction was developed efficiently by AuCl3 catalyzed intramolecularcyclization of aromatic o‐alkynyloximes and 2‐alkynylcycloalkene‐1‐carbaldoximes leading to the formation of isoquinoline and pyridine derivatives with high yields. This methodology has been applied for aromatic as well as aliphatic systems. Aromatic o‐alkynyloximes are benzene and naphthalene, whereas electron‐donating
Tandem Electrophilic Cyclization−[3+2] Cycloaddition−Rearrangement Reactions of 2-Alkynylbenzaldoxime, DMAD, and Br<sub>2</sub>
作者:Qiuping Ding、Zhiyong Wang、Jie Wu
DOI:10.1021/jo802076k
日期:2009.1.16
Tandem electrophilic cyclization-[3+2] cycloaddition -rearrangement reactions of 2-alkynylbenzaldoximes, DMAD, and bromine are described, which afford the unexpected isoquinoline-based azomethine ylides in good to excellent yields. The products could be further elaborated via palladium-catalyzed cross-coupling reactions to generate highly functionalized isoquinoline-based stable azomethine ylides.
Tandem cyclization-[3+3] cycloaddition reactions of 2-alkynylbenzaldoxime: synthesis of fused 1,2-dihydroisoquinolines
作者:Qiuping Ding、Zhiyong Wang、Jie Wu
DOI:10.1016/j.tetlet.2008.10.121
日期:2009.1
Tandem cyclization-[3+3] cycloaddition of 2-alkynylbenzaldoximes with dimethyl cyclopropane-1,1-dicarboxylate co-catalyzed by AgOTf and Yb(OTf)(3) is described, which provides an useful method for the synthesis of tetrahydro-1,2-oxazine fused 1,2-dihydroisoquinolines. (C) 2008 Elsevier Ltd. All rights reserved.