云南高校图书馆联盟文献共享服务平台- PYRANS

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Rhodium-Catalyzed Regioselective C-O and C-C Bonds Formation of 3-Oxopent-4-enenitriles with Alkynes for the Synthesis of Polysubstituted 2H-Pyrans: 《Chinese Journal of Chemistry》2024年第17期1986-1992,共7页Kelu Yan Xiao Liu Jiangwei Wen Qiuyun Li Junjie Wang Yang Zheng Xiu Wang; supported by the National Natural Science Foundation of China(No.22101152);the Youth Talent Program Startup Foundation of Qufu Normal University(No.614201);the School-Level Research Projects of Yancheng Institute of Technology(No.xjr2020044).; The rhodium-catalyzed C-H bond activation and cyclization of 3-oxopent-4-enenitriles with alkynes proceed efficiently.Various 2H-pyrans with multiple substituents are achieved in good yields through regioselective for...; 关键词：Rhodium/C-H activation 3-Oxopent-4-enenitriles ALKYNES 2H-Pyrans Transition metals Regioselectivity Cyclization Comprehensive Summary

Dihydroanthracene bridged bis-naphthopyrans:A multimodal chromophore with mechano-and photo-chromic properties: 《Chinese Chemical Letters》2024年第5期166-170,共5页Yanbing Shen Yuan Yuan Yaxin Wang Xiaonan Ma Wensheng Yang Yulan Chen; financially supported by the National Natural Science Foundation of China(Nos.22275068 and 21975178);the Fundamental Research Funds for the Central Universities;the Open Project of the State Key Laboratory of Supramolecular Structure and Materials.; Mechanochromophores based on bichromic molecular switches,such as bis-naphthopyanes,allow multimodal mechanochromic behavior beyond the typical binary response from single chromophores,which is important for distingui...; 关键词：Mechanochromic PHOTOCHROMIC Naphthopyan MULTICOLOR Dihydroanthracene

Chiral rhodium(Ⅱ)-catalyzed asymmetric aldol-type interception of an oxonium ylide to assemble chiral 2,3-dihydropyrans: 《Science China Chemistry》2022年第8期1607-1614,共8页Aimin Xu Xiaoyu Zhou Rimei Zheng Zhijing Zhang Xinru Yin Kemiao Hong Zhuofeng Ke Yu Qian Wenhao Hu; supported by the National Natural Science Foundation of China(22001268,21973113,81973176);the Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery(2019B030301005);the Program for Guangdong Introducing Innovative and Entrepreneurial Teams(2016ZT06Y337);the Guangdong Natural Science Fund(2020A1515010614);Key-Area Research and Development Program of Guangdong Province(2022B1111050003)。; A chiral dirhodium complex is an effective and robust catalyst for asymmetric carbene transformations.However,dirhodiumcatalyzed asymmetric ylide interception processes are rare,mainly because of the dissociation of t...; 关键词：asymmetric aldol-type interception oxonium ylide 2 3-dihydropyrans antiproliferation activity

Trihydrazinotrazine-grafting Fe_(3)O_(4)/SiO_(2) core-shell nanoparticles with expanded porous structure for organic reactions: 《Frontiers of Chemical Science and Engineering》2021年第4期1008-1020,共13页Jamal Rahimi Seyedeh Shadi Mirmohammadi Ali Maleki; This work was partially supported by the research council of the Iran University of Science and Technology.; This study focuses on the synthesis and characterization of a novel magnetic nanocomposite 2,4,6-trihydrazino-1,3,5-triazine(THDT)-fimctionalized with silica-coated iron oxide magnetic nanoparticles(MNPs).This nanocom...; 关键词：trihydrazino-triazine POROUS magnetic NANOCATALYST green CHEMISTRY tetrahydrobenzo[b]pyrans

Oxidative C—H alkynylation of 3,6-dihydro-2H-pyrans: 《Chinese Chemical Letters》2019年第7期1432-1434,共3页Ran Zhao Guidong Feng Xiaodong Xin Honghao Guan Jing Hua Renzhong Wan Wei Li Lei Liu; financial supported by the National Natural Science Foundation of China (No. 21722204);Fok Ying Tung Education Foundation (No. 151035);the Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Guangxi Normal University) (No. CHEMR2016-B09);Guangxi Funds for Distinguished expert; Current synthesis of α-substituted 3,6-dihydro-2H-pyrans dominantly relies on functional group transformation. Herein, a direct and practical oxidative C -H alkynylation and alkenylation of 3,6-dihydro-2H-pyran skele...; 关键词：3 6-Dihydro-2H-pyrans C-H FUNCTIONALIZATION ALKYNYLATION Oxidation ORGANOBORANE

Iron-Catalyzed Oxidative Cyclization of 1,6-Enones with Alde- hydes： Synthesis of Functionalized 3,4-Dihydro-2H-pyrans: 《Chinese Journal of Chemistry》2017年第3期303-306,共4页Leiyang Lv Zhiping Li

A cesium fluoride promoted efficient and rapid multicomponent synthesis of functionalized 2-amino-3-cyano-4H-pyran and spirooxindole derivatives被引量：3: 《Chinese Chemical Letters》2015年第10期1273-1277,共5页Yogesh B.Wagh Yogesh A.Tayade Swapnil A.Padvi Bhupesh S.Patil Nilesh B.Patil Dipak S.Dalal; SAIF Panjab University for providing analytical facilities for characterization of compounds; A rapid, one-pot and highly efficient protocol for the synthesis of pharmaceutically interesting functionalized 2-amino-3-cyano-4H-pyran and spirooxindole derivatives has been developed using commercially available Cs...; 关键词：Cesium fluoride 2-Amino-3-cyano-4H-pyrans Spirooxindoles Rapid synthesis Multicomponent reactions

One-pot three-component synthesis of tetrahydrobenzo[b]pyrans catalyzed by cost-effective ionic liquid in aqueous medium: 《Chinese Journal of Chemical Engineering》2015年第8期1416-1420,共5页杨健国刘硕胡华南任世斌应安国; Supported by the Zhejiang Provincial Natural Science Foundation of China(LY15B060002);the National Natural Science Foundation of China(21106090,21272169,21471110);the National Undergraduate Programs for Innovation and Entrepreneurship(201410350018); A simple and ef ficient method is proposed for the synthesis of tetrahydrobenzo[b]pyrans with aromatic aldehydes, active methylene compounds, and dimedone using basic ionic liquid catalyst in water. The procedure offe...; 关键词：Tetrahydrobenzo[b]pyrans Ionic liquid Recyclability

H_6P_2W_(18)O_(62)á18H_2O: A green and reusable catalyst for one-pot synthesis of pyrano[4,3-b]pyrans in water被引量：3: 《Chinese Chemical Letters》2013年第11期1033-1036,共4页Deepika Rajguru Balwant S. Keshwal Shubha Jain; A convenient,effcient and environmentally benign procedure has been developed for the synthesis of pyrano[4,3-b]pyran derivatives via a one-pot,three-component reaction of 4-hydroxy-6-methylpyran-2-one,aldehydes and m...; 关键词：H_6P_2W_18O_62á18H_2O Pyrano[4 3-b]pyran Synthesis Aqueous medium Environmentally benign

SnCl_2/nano SiO_2: A green and reusable heterogeneous catalyst for the synthesis of polyfunctionalized 4H-pyrans被引量：2: 《Chinese Chemical Letters》2013年第10期921-925,共5页Javad Safaei-Ghomi Raheleh Teymuri Hossein Shahbazi-Alavi Abolfazl Ziarati; University of Kashan for supporting this work by Grant No.159196/XV; A highly efficient and general method for the synthesis of polyfunctionalized 4H-pyrans is established through a one-pot multicomponent cyclocondensation of aromatic aldehydes with CH acids, malononitrile and ethyl ac...; 关键词：Nano silica supported tin （11） chloride Polyfunctionalized 4H-pyrans Multicomponent reactions Heterogeneous catalyst

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