Green Synthesis and Catalysis最新文献_第4页

Carbonylative transformation of aryl halides and strong bonds via cheap metal catalysts and sustainable technologies 通过廉价金属催化剂和可持续技术实现芳基卤化物和强键的羰基转化

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2024.04.008

Maolin Yang , Yukun Liu , Xin Qi , Yanhua Zhao , Xiao-Feng Wu

引用次数: 0

Visible-light induced photocatalyst-free difluoromethylation of quinoxalinones with difluorosulfones 可见光诱导的无光催化剂喹啉酮与二氟砜的二氟甲基化

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.08.002

Linlin Shi , Tiantian Li , Wenjing Zhang , Weinan Hu , Xinju Zhu , Yixin Lu , Guang-Jian Mei

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Solvent-controlled stereodivergent synthesis of E- and Z-enamines via metal-free formal C(sp2)-H amination of α-substituted styrenes 通过α-取代苯乙烯的无金属C(sp2)- h胺化，溶剂控制立体发散合成E-和z -胺

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.11.003

Dangui Wang , Jinbei Yao , Wentao Zhang , Shuyue Zhang , Huaibin Yu , Laihu Peng , Weijun Yao , Zhifeng Dai , Guojiao Wu , Fangrui Zhong

{"title":"Solvent-controlled stereodivergent synthesis of E- and Z-enamines via metal-free formal C(sp2)-H amination of α-substituted styrenes","authors":"Dangui Wang , Jinbei Yao , Wentao Zhang , Shuyue Zhang , Huaibin Yu , Laihu Peng , Weijun Yao , Zhifeng Dai , Guojiao Wu , Fangrui Zhong","doi":"10.1016/j.gresc.2023.11.003","DOIUrl":"10.1016/j.gresc.2023.11.003","url":null,"abstract":"<div><div>C(sp<sup>2</sup>)-H amination represents an attractive approach for the synthesis of enamines, which is intrinsically associated with the challenge of controlling of stereochemistry and primarily relying on transition-metal catalysis. Herein, a metal-free C(sp<sup>2</sup>)-H amination of α-substituted styrenes has been achieved, leading to stereodivergent formation of both <em>E</em>- and <em>Z</em>-enamines in 50 %–97 % yield under mild conditions by using PhI(OAc)<sub>2</sub> as a green oxidant and <em>ortho</em>-phenylenediamines as nitrogen source. Interestingly, the <em>Z</em>/<em>E</em> selectivity can be controlled readily by switching the reaction medium. <em>E</em>-isomers were formed preferentially in THF, whereas <em>n</em>-hexane favored the formation of <em>Z</em>-isomers. Preliminary mechanistic studies suggested that in situ formed <em>ortho</em>-benzoquinone diimides are the key intermediates, and there is a correlation between solvent polarity and stereoselectivity. This study enriches the chemical repertoire of <em>ortho</em>-benzoquinone diimides particularly with respect to sustainable amination.</div></div>","PeriodicalId":12794,"journal":{"name":"Green Synthesis and Catalysis","volume":"5 4","pages":"Pages 324-328"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visible-light-induced radical-cascade alkylation/cyclization of N-methacryloyl-2-phenylbenzimidazole: Access to benzoimidazo[2,1-a]isoquinolin-6(5H)-ones 可见光诱导n-甲基丙烯酰-2-苯基苯并咪唑的自由基级联烷基化/环化：苯并咪唑[2,1-a]异喹啉-6(5H)-酮的制备

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.10.001

Yanhong Wang , Xinlei Zhou , Tao Zhang , Xinxin Ren , Wei Xu , Bin Wang , Weiwei Jin , Yu Xia , Chenjiang Liu , Yonghong Zhang

引用次数: 0

Electrochemical enabled desaturated β-C(sp3)-H sulfonylation and phosphonylation of cyclic amines 电化学使环胺的去饱和β-C(sp3)-H磺化和膦化

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.11.008

Tao Liu , Jie Lin , Fangjun Xia , Zhenhui Xu , Xuying Xia , Wei Qian , Weihui Zhong , Dingguo Song , Fei Ling

引用次数: 0

Highly enantio-stereoselective Ni-catalyzed reductive cyclization to cyclopentanes with chiral quaternary centres of trisubstituted allylic siloxanes 高对映立体选择性镍催化的三取代烯丙基硅氧烷手性季中心环戊烷还原环化反应

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.08.004

Wanjun Chen , Xinlong Yan , Lin Fan , Xu Guo , Jian Yang , Yiming Chen , Shaofang Zhou , Guodu Liu

{"title":"Highly enantio-stereoselective Ni-catalyzed reductive cyclization to cyclopentanes with chiral quaternary centres of trisubstituted allylic siloxanes","authors":"Wanjun Chen , Xinlong Yan , Lin Fan , Xu Guo , Jian Yang , Yiming Chen , Shaofang Zhou , Guodu Liu","doi":"10.1016/j.gresc.2023.08.004","DOIUrl":"10.1016/j.gresc.2023.08.004","url":null,"abstract":"<div><div>The construction of chiral quaternary carbon stereocenters is a significant challenge in asymmetric synthesis. Catalytic synthesis of these structures with trisubstituted allylic alcohols is highly important. However, most of the reported methodologies required noble transition-metals. Herein we reported the first highly asymmetric stereoselective synthesis of cyclopentanes bearing chiral quaternary carbon stereocenters of trisubstituted allylic siloxanes by reductive cyclization of all carbon 1,6-alkynones with the non-noble nickel catalysis of Ni(cod)<sub>2</sub> with <em>P</em>-chiral monophosphine ligand <strong>(<em>S</em>)-BIDIME</strong>. Various multi-substituted functionalized cyclopentanes were obtained in high yields (up to 96%), excellent enantioselectivities (up to >99% <em>ee</em>) and perfect stereoselectivities (>99:1 <em>E/Z</em>). Thirty-two examples were successfully established for this method. Clarified mechanism studies were investigated first time by React-IR and DFT calculations to understand and explain the ligand-control of excellent enantio-stereoselectivity. Gram-scale reaction and control experiments were carried out. A new reaction design was proposed for further application of this type of catalysis.</div></div>","PeriodicalId":12794,"journal":{"name":"Green Synthesis and Catalysis","volume":"5 4","pages":"Pages 282-289"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89588262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transition-metal and base-free ether synthesis via alcohol-participated yne-allylic substitution 醇参与的炔烯取代法合成过渡金属和无碱醚

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.10.003

Chao Xu , Yingkun Luo , Shengtong Niu , Fan Gong , Shouang Lan , Benlong Luo , Jinggong Liu , Shuang Yang , Xinqiang Fang

引用次数: 0

Photoinduced decatungstate-catalyzed direct coupling of cycloalkanes and cyclic aldimines 光诱导十钨酸盐催化环烷和环醛胺的直接偶联

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.10.002

Jingjing Wang , Feng Li , Kai Liu , Chong Li , Sheng Cao , Yuxiang Wu , Yongjun Yuan , Fei Teng , Teng Wang , Yao Zhou

引用次数: 0

Transition metal-free Csp3-Csp3 bond-forming reactions of N-tosylaziridines and gem-diborylalkanes n - tosyziridine和gem-二硼烷的无过渡金属Csp3-Csp3成键反应

Green Synthesis and Catalysis Pub Date : 2024-11-01 DOI: 10.1016/j.gresc.2023.07.004

Pu-Zhang Zi , Quan-Hong Zhao , Zhan-Cai Ma , Xiao-Lin Ren , Xing-Bang Liu , Yi-Wei Qiao , Lin-Wen Wei , Song Liu , Yuan Huang

引用次数: 0

Photocatalytic selective 1,4-oxyimination/diamination across C=C and N=N bonds to access structurally diverse N-N-N triazane derivatives 跨 C=C 和 N=N 键的光催化选择性 1,4-氧亚氨基化/二氨基化，获得结构多样的 N-N-N 三氮烷衍生物

Green Synthesis and Catalysis Pub Date : 2024-08-02 DOI: 10.1016/j.gresc.2024.07.003

Yu-Shi Jiang, Dan-Na Chen, Huan Jiang, Peng-Ju Xia

引用次数: 0