Synthesis of Benzotriazine and Aryltriazene Derivatives Starting from 2-Azidobenzonitrile Derivatives
作者:Azadeh Nakhai、Birgitta Stensland、Per H. Svensson、Jan Bergman
DOI:10.1002/ejoc.201000328
日期:2010.12
3-Substituted 3,4-dihydro-4-imino-1,2,3-benzotriazine derivatives 7 were formed from 2-azidobenzonitriles 4 as starting materials on treatment with Grignard or lithium organic reagents. In some cases these procedures gave aryltriazenes 10 and 11 as products. All compounds were identified by NMR spectroscopy and the structures of three products, namely 7a, 10a and 11i, were corroborated by X-ray crystallography
Copper-Catalyzed Carbonyl Group Controlled Coupling of Isatin Oximes with Arylboronic Acids To Prepare <i>N</i>
-Aryloxindole Nitrones
作者:Xue-Ling Mo、Chun-Hua Chen、Cui Liang、Dong-Liang Mo
DOI:10.1002/ejoc.201701324
日期:2018.1.17
prepared in good to excellent yields by copper-catalyzed coupling of N-unprotected isatin oximes with aryl boronic acids under mild reaction conditions. The reaction was tolerant various arylboronicacids with diverse sensitive functionalgroups. Detailed studies showed that the carbonyl group in isatin oximes might be served as a carbonyl ligand or a controlled group playing important roles in the formation
One-pot cascade ring enlargement of isatin-3-oximes to 2,4-dichloroquinazolines mediated by bis(trichloromethyl)carbonate and triarylphosphine oxide
作者:Jinjing Qin、Zhenhua Li、Shengzhe Ma、Lixian Ye、Guoqiang Jin、Weike Su
DOI:10.1080/10426507.2020.1782910
日期:2020.12.1
Abstract An efficient and convenient one-pot cascade synthesis of 2,4-dichloroquinazolines directly from isatin-3-oximes with the addition of bis(trichloromethyl)carbonate and triarylphosphine oxide was developed, leading to substituted quinazolines in moderate to excellent yields. The efficiency of this transformation was demonstrated by compatibility with a range of functional groups. Thus, the method
method for the synthesis of isatin oximes was developed through the radical coupling reactions of oxindoles with t-BuONO. This protocol provides a practical and environmentally benign method for the construction of C–N bonds in water at room temperature without using any other reagents. The advantages of this strategy are its mild reaction conditions and clean procedure.
Copper-Catalyzed Selective <i>N</i>-Vinylation of 3-(Hydroxyimino)indolin-2-ones with Alkenyl Boronic Acids: Synthesis of <i>N</i>-Vinyl Nitrones and Spirooxindoles
作者:Chun-Hua Chen、Qing-Qing Liu、Xiao-Pan Ma、Yu Feng、Cui Liang、Cheng-Xue Pan、Gui-Fa Su、Dong-Liang Mo
DOI:10.1021/acs.joc.7b00620
日期:2017.6.16
A copper-catalyzed selective cross-coupling reaction of 3-(hydroxyimino)indolin-2-ones with alkenylboronicacids to access (E)-N-vinyl oxindole nitrones has been achieved under mild conditions. The studies showed that catalytic copper salt selectively gave mono N-vinylation products, while 2.0 equiv of copper salt provided double N-vinylation products. The control experiments revealed that the carbonyl