Efficient metal-free visible light photocatalytic aromatization of azaheterocyles
A metal free visible light photocatalytic oxidative aromatization of several aromatic azaheterocycles is reported using a newly developed 1,8-dimethoxy substituted acridinium ions (PC-2). With very low catalyst loading, it can photocatalyzed the oxidative dehydrogenation of differently substituted d...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | Current Research in Green and Sustainable Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666086521000825 |
| _version_ | 1819102285803814912 |
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| author | Karan Chhetri Samuzal Bhuyan Susanta Mandal Sonia Chhetri Pema T. Lepcha Sonam W. Lepcha Joneswar Basumatary Biswajit Gopal Roy |
| author_facet | Karan Chhetri Samuzal Bhuyan Susanta Mandal Sonia Chhetri Pema T. Lepcha Sonam W. Lepcha Joneswar Basumatary Biswajit Gopal Roy |
| author_sort | Karan Chhetri |
| collection | DOAJ |
| description | A metal free visible light photocatalytic oxidative aromatization of several aromatic azaheterocycles is reported using a newly developed 1,8-dimethoxy substituted acridinium ions (PC-2). With very low catalyst loading, it can photocatalyzed the oxidative dehydrogenation of differently substituted dihydropyridines, and pyrazolines to corresponding pyridines and pyrazoles in very short time and in most cases with near quantitative yield. This green photocatalytic aromatization method uses aerial oxygen as terminal oxidant to generate water as the only by-product. Scaling up experiment with 2 g of compound 1a, using 0.03% PC-2 catalyst loading, successfully demonstrated within 3 h to give 96% isolated product yield. |
| first_indexed | 2024-12-22T01:32:08Z |
| format | Article |
| id | doaj.art-efe92f983eeb4a0aa9f5b048cfa1f793 |
| institution | Directory Open Access Journal |
| issn | 2666-0865 |
| language | English |
| last_indexed | 2024-12-22T01:32:08Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Current Research in Green and Sustainable Chemistry |
| spelling | doaj.art-efe92f983eeb4a0aa9f5b048cfa1f7932022-12-21T18:43:28ZengElsevierCurrent Research in Green and Sustainable Chemistry2666-08652021-01-014100135Efficient metal-free visible light photocatalytic aromatization of azaheterocylesKaran Chhetri0Samuzal Bhuyan1Susanta Mandal2Sonia Chhetri3Pema T. Lepcha4Sonam W. Lepcha5Joneswar Basumatary6Biswajit Gopal Roy7Department of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaDepartment of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaDepartment of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaDepartment of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaDepartment of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaDepartment of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaDepartment of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaCorresponding author.; Department of Chemistry, Sikkim University, 6th Mile, Tadong, Gangtok, Sikkim, 737102, IndiaA metal free visible light photocatalytic oxidative aromatization of several aromatic azaheterocycles is reported using a newly developed 1,8-dimethoxy substituted acridinium ions (PC-2). With very low catalyst loading, it can photocatalyzed the oxidative dehydrogenation of differently substituted dihydropyridines, and pyrazolines to corresponding pyridines and pyrazoles in very short time and in most cases with near quantitative yield. This green photocatalytic aromatization method uses aerial oxygen as terminal oxidant to generate water as the only by-product. Scaling up experiment with 2 g of compound 1a, using 0.03% PC-2 catalyst loading, successfully demonstrated within 3 h to give 96% isolated product yield.http://www.sciencedirect.com/science/article/pii/S2666086521000825Metal freeVisible lightOxidative aromatizationAzaheterocyclesPhotoredox catalysis |
| spellingShingle | Karan Chhetri Samuzal Bhuyan Susanta Mandal Sonia Chhetri Pema T. Lepcha Sonam W. Lepcha Joneswar Basumatary Biswajit Gopal Roy Efficient metal-free visible light photocatalytic aromatization of azaheterocyles Current Research in Green and Sustainable Chemistry Metal free Visible light Oxidative aromatization Azaheterocycles Photoredox catalysis |
| title | Efficient metal-free visible light photocatalytic aromatization of azaheterocyles |
| title_full | Efficient metal-free visible light photocatalytic aromatization of azaheterocyles |
| title_fullStr | Efficient metal-free visible light photocatalytic aromatization of azaheterocyles |
| title_full_unstemmed | Efficient metal-free visible light photocatalytic aromatization of azaheterocyles |
| title_short | Efficient metal-free visible light photocatalytic aromatization of azaheterocyles |
| title_sort | efficient metal free visible light photocatalytic aromatization of azaheterocyles |
| topic | Metal free Visible light Oxidative aromatization Azaheterocycles Photoredox catalysis |
| url | http://www.sciencedirect.com/science/article/pii/S2666086521000825 |
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