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Gadhave MS, Barik S, Wessels F, Biju AT. Nucleophilic Acylation-Annulation Cascade of 2-Chlorobenzonitriles Using Aldehydes Triggered by N-Heterocyclic Carbenes. Org Lett 2023; 25:8314-8319. [PMID: 37962305 DOI: 10.1021/acs.orglett.3c03376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
A general and practical route to the synthesis of functionalized isoindolin-2-ones from commercially available aldehydes and 2-chlorobenzonitriles under mild conditions initiated by N-heterocyclic carbenes is presented. The catalytically generated Breslow intermediates from aldehydes and carbenes underwent smooth SNAr with 2-chlorobenzonitriles followed by annulation triggered by adventitious water present in DMF to furnish the functionalized isoindolin-2-ones in good to excellent yields.
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Affiliation(s)
- Mahesh S Gadhave
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Soumen Barik
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Felix Wessels
- Organisch-Chemisches Institut, Universität Münster, 48149 Münster, Germany
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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Rajeev N, Swaroop TR, Alrawashdeh AI, Rahman S, Alodhayb A, Anil SM, Kiran KR, Chandra, Georghiou PE, Rangappa KS, Sadashiva MP. The reaction of arylmethyl isocyanides and arylmethylamines with xanthate esters: a facile and unexpected synthesis of carbamothioates. Beilstein J Org Chem 2020; 16:159-167. [PMID: 32117472 PMCID: PMC7034244 DOI: 10.3762/bjoc.16.18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 01/24/2020] [Indexed: 11/23/2022] Open
Abstract
An unexpected formation of carbamothioates by a sodium hydride-mediated reaction of arylmethyl isocyanides with xanthate esters in DMF is reported. The products thus obtained were compared with the carbamothioates obtained by the sodium hydride-mediated condensation of the corresponding benzylamines and xanthate esters in DMF. To account for these unexpected reactions, a mechanism is proposed in which the key steps are supported by quantum chemical calculations.
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Affiliation(s)
- Narasimhamurthy Rajeev
- Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysuru, Karnataka 570 006, India
| | - Toreshettahally R Swaroop
- Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysuru, Karnataka 570 006, India.,Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador A1B3X7, Canada
| | - Ahmad I Alrawashdeh
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador A1B3X7, Canada
| | - Shofiur Rahman
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador A1B3X7, Canada.,Aramco Laboratory for Applied Sensing Research, King Abdullah Institute for Nanotechnology, King Saudi University, Riyadh, Saudi Arabia
| | - Abdullah Alodhayb
- Aramco Laboratory for Applied Sensing Research, King Abdullah Institute for Nanotechnology, King Saudi University, Riyadh, Saudi Arabia.,Surface, and Interface Sciences, Department, of Physics and Astronomy, College of Science, King Saudi University, Riyadh 11451, Saudi Arabia
| | - Seegehalli M Anil
- Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysuru, Karnataka 570 006, India
| | - Kuppalli R Kiran
- Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysuru, Karnataka 570 006, India
| | - Chandra
- Department of Physics, National Institute of Engineering, Mysuru, Karnataka 570 008, India
| | - Paris E Georghiou
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador A1B3X7, Canada
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