OXAZINES

作品数：9被引量：4H指数：1
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相关期刊：《Chemical Research in Chinese Universities》《Chinese Journal of Chemistry》《Organic Chemistry Frontiers》《Chinese Chemical Letters》更多>>
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Yb(OTf)_(3)-Catalyzed Asymmetric[3+3]Cycloaddition of N-Vinyl Nitrones with Activated Cyclopropanes to Prepare 1,2-Oxazines
《Chinese Journal of Chemistry》2025年第4期417-422,共6页Yu-Zheng Wu Yue Leng Yi-Xin Chen Shi-Qiu Huang Ning Zou Chun-Hua Chen Dong-Liang Mo 
Financial support from the NSFC(22071035);Natural Science Foundation of Guangxi(2023GXNSFDA026025);Guangxi Science and Technology Plan Project(AD23026046);Graduate Innovation Training Program of Guangxi(YCSW2024160);Natural Science Foundation of Sichuan(2023NSFSC1087);Guangxi Bagui Young Scholar is greatly appreciated.
We described a Yb(OTf)_(3) combined with Pybox ligand catalyzed asymmetric[3+3]cycloaddition of N-vinyl cinnamaldehyde nitrones with activated cyclopropanes to prepare various functionalized 1,2-oxazines in 24%—95% y...
关键词：CYCLOADDITION Cyclopropane NITRONE 1 2-Oxazine Asymmetric catalysis Domino reactions Michael addition N-Heterocycle 
Structurally Divergent Synthesis of Azetidines,5,6-Dihydro-1,3-oxazines and 2,3-Dihydro-1,4-oxazines through Palladium-Catalyzed Tandem Allylic Substitution Reaction
《Chinese Journal of Chemistry》2024年第22期2773-2778,共6页Ru-Fang Meng Yu-Juan Kong Xiao-Yan Wu Huan Zhang Wei Wang Wen-Jie Liang Lan Zheng Chenxiang Lin Wei Su Jun-An Xiao 
support from the Natural Science Foundation of Guangxi(2023GXNSFDA026063);National Natural Science Foundation of China(22261036);High-level Innovation Team and Outstanding Scholar Program in Guangxi Colleges and Universities.
A regiodivergent synthesis of azetidines,5,6-dihydro-1,3-oxazines and 2,3-dihydro-1,4-oxazines has been achieved through palladium-catalyzed tandem allylic substitution reaction.This protocol provides a variety of het...
关键词：Palladium catalysis ANNULATION AZETIDINE Domino reactions Regioselectivity Allylic dicarbonate Allylic substitution 
One-pot enantioselective construction of 3,4-dihydro-2H-1,4-oxazines over Ru/Au relay catalysis and its mechanistic serendipity
《Organic Chemistry Frontiers》2022年第1期102-108,共7页Dongfeng Yang Chengyi Wang Yu Wang Guohua Liu Tanyu Cheng Rui Liu 
the National Natural Science Foundation of China(22001170,22071154 and 21872095);the Shanghai Sciences and Technologies Development Fund(20070502600);the Shanghai Frontiers Science Research Base of Biomimetic Catalysis for financial support.
The preparation of enantiomerically pure 1,4-oxazines remains a continuous challenge in synthetic chemistry because of their potential application in the total synthesis of morpholines.Herein,a one-pot asymmetric tran...
关键词：process CHIRAL HYDROGENATION 
Ming-Phos/Gold(Ⅰ)-Catalyzed Stereodivergent Synthesis of Highly Substituted Furo[3,4-d][i,2]oxazines被引量：1
《Chinese Journal of Chemistry》2020年第6期577-582,共6页Lujia Zhou Bing Xu Danting Ji Zhan-Ming Zhang Junliang Zhang 
the fundi ng support of NSFC(Nos.21425205,21672067,21801078);973 Program(No.2015CB856600);the Program of Eastern Scholar at Shanghai Institutions of Higher Learning and the China Postdoctoral Science Foundation(Nos.2019M650071,2019M661418).
A gold(Ⅰ)-catalyzed asymmetric intermolecular tandem[3+3]-cyclization reaction of 2-(l-alkynyl)-2-alken-l-ones with nitrones has been developed by using Ming-Phos as a chiral ligand.This method enables access to the ...
关键词：SUBSTITUTED HIGHLY 
Gold（Ⅰ）-Catalyzed Diastereo- and Enantioselective Synthesis of Polysubstituted Pyrrolo[3,4-d][1,2 ]oxazines被引量：3
《Chinese Journal of Chemistry》2018年第6期519-525,共7页MeiZhang Xiaoyu Di Mingrui Zhang Junliang Zhang 
We are grateful to the National Natural Science Foundation of China （21425205）, Ministry of Education of China, Ying Tung Education Foundation （121014） for financial support.
A gold（I）-catalyzed highly diastereo- and enantioselective intermolecular cycloaddition of oxime ethers with nitrones under mild conditions was developed, which provides an facile access to optically pure highly sub...
关键词：gold（Ⅰ）-catalysis heterobicyclic pyrroles oxime ethers NITRONES tandem reaction 
One-pot Two-Step Cycloaddition Reaction for Convenient Synthesis of Polycyclic Spirooxindole-fused [1,3]Oxazines
《Chinese Journal of Chemistry》2015年第9期1049-1056,共8页Jing Sun Hui Gong Chaoguo Yan 
This work was financially supported by the National Natural Science Foundation of China （Grant No. 21272200） and the Priority Academic Program Development of Jiangsu Higher Education Institutions. We would also like to express our sincere thanks to the Analysis Center of Yangzhou University for providing all necessary instruments for characterization of structures.
The novel spirooxindoline fused [1,3]oxazines were efficiently synthesized from Diels-Alder reaction of N-arylmaleimides with 1,2-dihydro-2-oxospiro[3H-indole-3,2＇-[2H,9aH-pyrido[2,1-b][l,3]oxazines], which were gene...
关键词：Diels-Alder reaction one-pot reaction DIASTEREOSELECTIVITY SPIROOXINDOLE [1 3]oxazine MALEIMIDE 
Polyethylene glycol(PEG) mediated expeditious synthetic route to 1,3-oxazine derivatives
《Chinese Chemical Letters》2011年第8期915-918,共4页Pravin V.Shinde Amol H.Kategaonkar Bapurao B.Shingate Murlidhar S.Shingare 
Various 1,3-oxazine derivatives were synthesized in high yields,within shorter reaction times using PEG-400 as a safer medium/ mediator.This synthetic route is exceedingly easy and avoids the use of acid/base catalysts.
关键词：Ecofriendly synthetic protocol Green chemistry 1 3-Oxazines Polyethylene glycol（PEG） 
Convenient Synthesis of Substituted Quinoxalines and 2H-Benzo[b][1,4]oxazines in Water
《Chemical Research in Chinese Universities》2009年第2期174-177,共4页DING Chang-jiang WANG Yan ZHANG Wei-wei LIU Li LIANG Yong-jiu DONG De-wen 
Supported by the National Natural Science Foundation of China(Nos.20572013 and 20711130229);the Department of Science and Technology of Jilin Province, China(No.20050309-2).
A facile and convenient synthesis method has been developed for substituted quinoxalines and 2H-benzo[b][1,4]oxazines from the reactions of a-bromoketones with benzene-1,2-diamine and 2-aminophenol, respectively, whic...
关键词：QUINOXALINE Benzene-l 2-diamine 2-AMINOPHENOL a-Bromoketone WATER 
Synthesis of 2H-3,1-pyrazolo[3,4-e]oxazines via a new conversion of Friedlander reaction
《Chinese Chemical Letters》2007年第6期636-638,共3页Li, Jia Rong Zhang, Li Jun Chen, Jin Nan Yang, Xi Quan Wang, Li Jun Zhao, Xiao Fan Qiu, Jun Xia 
2H-3,l-Pyrazolo[3,4-e]oxazines (5a-c) and tacrine analogies (6a-c) were designed and prepared using 5-amino-4-cyanopyrazole (7) and cycloketones (2a-c) as reactants. The study demonstrated that the new conversion exis...
关键词：PYRAZOLE OXAZINES TACRINE CYCLOCONDENSATION SYNTHESIS 
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