Tetrahedron最新文献_第7页

Bidentate deltamide hydrogen bond donor catalyzed cycloaddition of carbon dioxide into epoxide

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-11 DOI: 10.1016/j.tet.2025.134587

Chunyu Li, Yujia Wang, Zhenjiang Li, Ling Li, Min Zhang, Yanqi Shi, Yue Xu, Xin Zou, Xin Yuan, Kai Guo

{"title":"Bidentate deltamide hydrogen bond donor catalyzed cycloaddition of carbon dioxide into epoxide","authors":"Chunyu Li, Yujia Wang, Zhenjiang Li, Ling Li, Min Zhang, Yanqi Shi, Yue Xu, Xin Zou, Xin Yuan, Kai Guo","doi":"10.1016/j.tet.2025.134587","DOIUrl":"10.1016/j.tet.2025.134587","url":null,"abstract":"<div><div>The cycloaddition of carbon dioxide into epoxides through hydrogen bond donor (HBD) and halide nucleophile as a binary catalyst to afford cyclic carbonates has become a key strategy for fixing carbon dioxide. A series of bidentate HBD catalysts of deltamides featured with N–H bond were synthesized and evaluated in the cycloaddition of CO<sub>2</sub> to epoxides (CCE) reactions. The influences on the catalytic activity were scrutinized, which included tunable substituents, types of nucleophiles, reaction time, temperature and the loading of the catalyst. The HBD catalyst 2,3-bis((4-(trifluoromethyl)phenyl)amino)cycloprop-2-en-1-one (DT3) with substituted –CF<sub>3</sub> group in combination with tetrabutylammonium iodide (NBu<sub>4</sub>I) showed the best performance with 95 % conversion of styrene oxide into cyclic carbonate under mild conditions (0.1 MPa, 100 °C and 12 h). Substrate applicability of the catalyst is illustrated by the conversion of quantity terminal epoxides with excellent yields and quantitative selectivity. <sup>1</sup>H NMR titration spectra and control studies were employed to probe a reasonable activation mechanism of the cycloaddition of CO<sub>2</sub> to epoxides reactions.</div></div>","PeriodicalId":437,"journal":{"name":"Tetrahedron","volume":"177 ","pages":"Article 134587"},"PeriodicalIF":2.1,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cascade C(sp3)-H bond functionalization/cyclization reaction for the synthesis of 3,3-disubstituted oxindoles by decatungstate photocatalysis

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-11 DOI: 10.1016/j.tet.2025.134578

Xianhe Fang , Jiaxing Lv , Shuxin Yang , Mingyu Ma , Runzhe Yang , Yi Bi

引用次数: 0

Isolation, characterization, and biological activities of halogenated sesquiterpenes and C15 acetogenins from the Okinawan sea hare, Aplysia argus

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-10 DOI: 10.1016/j.tet.2025.134588

Ryunosuke Nakamura , Koushi Matsuyama , Naomichi Arima , Fumito Tani , Satoaki Onitsuka , Hiroaki Okamura , Tetsuo Iwagawa , Masayuki Sudoh , Toshiyuki Hamada

引用次数: 0

Gold nanoparticle-enhanced cross-linked porous organic polymer photocatalysts for visible light-driven oxidation of phenylboronic acid

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-10 DOI: 10.1016/j.tet.2025.134585

Xin Liu, Jiaxi Cai, Qiaoya Wang, Haixia Song, Aizhao Pan, Mingyou Hu

引用次数: 0

Catalyst-free [2 + 1] annulations of conjugated dienes and sulfur Ylides: Synthesis of cyclopropane derivatives

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-10 DOI: 10.1016/j.tet.2025.134584

Qian Wang , Yue Wang , Er-Qing Li

引用次数: 0

Synthesis of new enaminone derivatives and studying the one-pot three-component reaction of anilines, triethyl orthoformate, and active methylene compounds using CeO2 nanoparticles as a catalyzing

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-06 DOI: 10.1016/j.tet.2025.134577

Arezoo Sardashti-Birjandi, Ebrahim Mollashahi, Malek Taher Maghsoodlou

引用次数: 0

Progress in trifluoromethylation reaction of olefins

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-05 DOI: 10.1016/j.tet.2025.134545

Li-Jun Li, Xin-Yue Li, Jin Zhang, Hong Li, Qiang-Wei Fan, Yang Li

引用次数: 0

Synthesis of benzimidazo[1,2-c]quinazolin-6(5H)-one derivatives via copper-mediated C–H isocyanatation of 2-arylbenzimidazoles 通过铜介导的 2-芳基苯并咪唑 C-H 异氰酸化合成苯并咪唑并[1,2-c]喹唑啉-6(5H)-酮衍生物

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-03 DOI: 10.1016/j.tet.2025.134569

Ali Nasirpour, Zarrin Ghasemi

引用次数: 0

New NHC–Pd complexes bearing bulky steric hindrance: Synthesis and catalytic activity in the Heteroaryl–Heteroaryl Buchwald–Hartwig amination reaction

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-03-01 DOI: 10.1016/j.tet.2025.134567

Xian-Fei Deng, Yan-Jun Chen, Li-Yu Yi, Ju Huang

引用次数: 0

Sonochemically synthesized copper chelate from expired streptomycin sulfate as a sustainable catalyst for green synthesis of 1,4-disubstituted triazoles in aqueous medium

IF 2.1 3区化学

Tetrahedron Pub Date : 2025-02-28 DOI: 10.1016/j.tet.2025.134564

Neetu Mev , Yachana Jain , Lalita Yadav , Priya Sharma , Madhu Agarwal , Ragini Gupta

{"title":"Sonochemically synthesized copper chelate from expired streptomycin sulfate as a sustainable catalyst for green synthesis of 1,4-disubstituted triazoles in aqueous medium","authors":"Neetu Mev , Yachana Jain , Lalita Yadav , Priya Sharma , Madhu Agarwal , Ragini Gupta","doi":"10.1016/j.tet.2025.134564","DOIUrl":"10.1016/j.tet.2025.134564","url":null,"abstract":"<div><div>This research work introduces a pioneering strategy for harnessing the potential of expired streptomycin sulfate as its copper chelate to catalyze the synthesis of biologically important 1,4-disubstituted-1,2,3-triazoles efficiently. The efficacy of this catalyst is showcased by the sonochemical 1,3-dipolar cycloaddition process, yielding 1,4-disubstituted-1,2,3-triazoles at 40 °C using a promotor ligand <span>l</span>-phenylalanine within 30 min in >90 % yield in aqueous media with high purity. The biocompatible promoter ligand assists the STR Cu chelate to enhance the reaction rate by stabilizing the Cu(I) oxidation state and preventing its undesirable disproportionation, thus increasing the yield of the intended product. The synthesized catalyst demonstrates extensive substrate compatibility and works equally well with precursors containing both electron donating and withdrawing groups (<strong>4–25</strong>). Additionally, all the synthesized compounds, as well as the catalyst, have been duly characterized by the usual analytical and spectroscopic techniques. Furthermore, the catalyst could be reused up to four cycles without a significant reduction in its catalytic performance.</div></div>","PeriodicalId":437,"journal":{"name":"Tetrahedron","volume":"177 ","pages":"Article 134564"},"PeriodicalIF":2.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0