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Luo CH, Wang PL, Chang CC. Cascade Vinyl Radical Ipso-Cyclization Reactions and the Formation of α,β-Unsaturated-β-aryl-γ-lactams from N-Propargyl Benzamides. J Org Chem 2021; 86:15033-15044. [PMID: 34591475 DOI: 10.1021/acs.joc.1c01717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Various N-(2-bromo-allyl) benzamides were used as the starting materials to study vinyl radical cyclization reactions. The vinyl radicals underwent ipso-cyclization, fragmentation, and cyclization reactions to produce β-aryl-γ-lactams with the carbonyl group remaining intact. To further study this cascade radical reaction, vinyl radicals were generated by the addition of a tributyltin radical to alkyne moieties, followed by radical ipso-cyclization, fragmentation, cyclization, and β-scission reactions with the production of a series of α,β-unsaturated-β-aryl-γ-lactam derivatives. This new type of radical reaction was examined from the substituent effects on both the amino groups and the aryl groups. A bulky tert-butyl substituent on the amino group enhanced the formation of a Z-conformation of the benzamides and facilitated vinyl radical ipso-cyclization reactions. A synthetic method for preparing α,β-unsaturated-β-aryl-γ-lactams from N-propargyl benzamides was developed.
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Affiliation(s)
- Chih-Hao Luo
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City, 24205 Taiwan
| | - Pei-Ling Wang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City, 24205 Taiwan
| | - Che-Chien Chang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City, 24205 Taiwan
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Gloor CS, Dénès F, Renaud P. Hydrosulfonylation Reaction with Arenesulfonyl Chlorides and Tetrahydrofuran: Conversion of Terminal Alkynes into Cyclopentylmethyl Sulfones. Angew Chem Int Ed Engl 2017; 56:13329-13332. [DOI: 10.1002/anie.201707791] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Christian Simon Gloor
- Department of Chemistry and Biochemistry; University of Bern; Freiestrasse 3 3012 Bern Switzerland
| | - Fabrice Dénès
- CEISAM UMR CNRS 6230-UFR des Sciences et des Techniques; Université de Nantes; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Philippe Renaud
- Department of Chemistry and Biochemistry; University of Bern; Freiestrasse 3 3012 Bern Switzerland
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Gloor CS, Dénès F, Renaud P. Hydrosulfonylation Reaction with Arenesulfonyl Chlorides and Tetrahydrofuran: Conversion of Terminal Alkynes into Cyclopentylmethyl Sulfones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707791] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Christian Simon Gloor
- Department of Chemistry and Biochemistry; University of Bern; Freiestrasse 3 3012 Bern Switzerland
| | - Fabrice Dénès
- CEISAM UMR CNRS 6230-UFR des Sciences et des Techniques; Université de Nantes; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Philippe Renaud
- Department of Chemistry and Biochemistry; University of Bern; Freiestrasse 3 3012 Bern Switzerland
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Gloor CS, Dénès F, Renaud P. Memory of chirality in reactions involving monoradicals. Free Radic Res 2016; 50:S102-S111. [DOI: 10.1080/10715762.2016.1232485] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - Fabrice Dénès
- Universite de Nantes, UFR Science et Techniques - UMR CNRS 6230, 2 rue de la Houssinière, Nantes, France
| | - Philippe Renaud
- Department of Chemistry and Biochemistry, University of Bern, Bern, Switzerland
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Foschi F, Tagliabue A, Mihali V, Pilati T, Pecnikaj I, Penso M. Memory of Chirality Approach to the Enantiodivergent Synthesis of Chiral Benzo[d]sultams. Org Lett 2013; 15:3686-9. [DOI: 10.1021/ol401557v] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Francesca Foschi
- CNR-Institute of Molecular Science and Technologies (ISTM), Via Golgi 19, I-20133 Milano, Italy, and Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Aaron Tagliabue
- CNR-Institute of Molecular Science and Technologies (ISTM), Via Golgi 19, I-20133 Milano, Italy, and Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Voichita Mihali
- CNR-Institute of Molecular Science and Technologies (ISTM), Via Golgi 19, I-20133 Milano, Italy, and Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Tullio Pilati
- CNR-Institute of Molecular Science and Technologies (ISTM), Via Golgi 19, I-20133 Milano, Italy, and Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Ilir Pecnikaj
- CNR-Institute of Molecular Science and Technologies (ISTM), Via Golgi 19, I-20133 Milano, Italy, and Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Michele Penso
- CNR-Institute of Molecular Science and Technologies (ISTM), Via Golgi 19, I-20133 Milano, Italy, and Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, I-20133 Milano, Italy
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Unusual rearrangement and dearomatization reactions in Cu(I)-catalyzed atom transfer radical cyclizations from N-(1-phenylethyl)trichloroacetamides. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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