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Roy S, Unnikrishnan KA, Chakraborty A, Kuniyil R, Chatterjee I. Exploiting N-Centered Umpolung Reactivity of α-Iminomalonates for the Synthesis of N-Sulfenylimines and Sulfonamides. Org Lett 2024; 26:1629-1634. [PMID: 38380999 DOI: 10.1021/acs.orglett.4c00110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
An efficient and interesting N-centered umpolung method has been disclosed to construct beneficial S-N bonds, furnishing N-sulfenylimines, which can readily be converted into the corresponding sulfonamide derivatives in a one-pot sequential operation. N-Sulfenylimines are potent intermediates in organic synthesis, whereas sulfonamides are of major molecular interest due to their rich biological activities and wide applicability in medicinal chemistry. Owing to the simple reaction conditions and setup, this protocol displays a broad and versatile substrate scope, resulting in excellent functional group tolerability toward the synthesis of both N-sulfenylimines and sulfonamides. A density functional theory (DFT) computed and experimentally supported convenient mechanism has been proposed for this unique method.
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Affiliation(s)
- Sourav Roy
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | | | - Arijit Chakraborty
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Rositha Kuniyil
- Department of Chemistry, Indian Institute of Technology Palakkad, Kanjikode (P. O.), Palakkad, Kerala 678623, India
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
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Yagci BB, Donmez SE, Şahin O, Türkmen YE. Catalytic aza-Nazarov cyclization reactions to access α-methylene-γ-lactam heterocycles. Beilstein J Org Chem 2023; 19:66-77. [PMID: 36741815 PMCID: PMC9874235 DOI: 10.3762/bjoc.19.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 01/10/2023] [Indexed: 01/19/2023] Open
Abstract
We have developed a catalytic aza-Nazarov reaction of N-acyliminium salts generated in situ from the reaction of a variety of cyclic and acyclic imines with α,β-unsaturated acyl chlorides to afford substituted α-methylene-γ-lactam heterocycles. The reactions proceed effectively in the presence of catalytic (20 mol %) amounts of AgOTf as an anion exchange agent or hydrogen-bond donors such as squaramides and thioureas as anion-binding organocatalysts. The aza-Nazarov cyclization of 3,4-dihydroisoquinolines with α,β-unsaturated acyl chlorides gives tricyclic lactam products 7 in up to 79% yield with full diastereocontrol (dr = >99:1). The use of acyclic imines in a similar catalytic aza-Nazarov reaction with 20 mol % of AgOTf results in the formation of α-methylene-γ-lactam heterocycles 19 in up to 76% yield and with good to high diastereoselectivities (4.3:1 to 16:1). We have demonstrated the scalability of the reaction with a gram-scale example. The relative stereochemistry of the α-methylene-γ-lactam products 19 has been determined via the single-crystal X-ray analysis of lactam 19l. In order to shed light on the details of the reaction mechanism, we have performed carefully designed mechanistic studies which consist of experiments on the effect of β-silicon stabilization, the alkene geometry of the α,β-unsaturated acyl chloride reactants, and adventitious water on the success of the catalytic aza-Nazarov reaction.
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Affiliation(s)
- Bilge Banu Yagci
- Department of Chemistry, Faculty of Science, Bilkent University, Ankara 06800, Turkey
| | - Selin Ezgi Donmez
- Department of Chemistry, Faculty of Science, Bilkent University, Ankara 06800, Turkey
| | - Onur Şahin
- Department of Occupational Health & Safety, Faculty of Health Sciences, Sinop University, Sinop 57000, Turkey
| | - Yunus Emre Türkmen
- Department of Chemistry, Faculty of Science, Bilkent University, Ankara 06800, Turkey,UNAM – National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey
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Lan W, Zhu J, Abulaiti B, Chen G, Zhang Z, Yan N, Wan JP, Zhang X, Liao L. Zinc Trifluoromethanesulfonate-Catalyzed para-Selective Amination of Free Anilines and Free Phenols with Quinoneimides. J Org Chem 2022; 87:13895-13906. [DOI: 10.1021/acs.joc.2c01600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weiqiao Lan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jiatong Zhu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Buweihailiqiemu Abulaiti
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Genyuan Chen
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Zhihao Zhang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Nan Yan
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Xiaomei Zhang
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Lihua Liao
- School of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, P. R. China
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
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Lan W, Liu F, Hu J, Zhu J, Hu S, Wan JP, Liao L. Copper-Catalyzed Regiospecific Amination of Heteroarenes with Quinoneimides. J Org Chem 2022; 87:5592-5602. [PMID: 35420810 DOI: 10.1021/acs.joc.1c02873] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, an unprecedented and widely applicable strategy for the regioselective C-3 amination of indoles and C-2 amination of heteroarenes (pyrrole and benzofuran) is presented in a simple, high-efficiency way. This protocol is also one of the few methods for the efficient construction of C-N bonds of quinoneimides by the 1,6-addition reaction.
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Affiliation(s)
- Weiqiao Lan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Fangyi Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jintao Hu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jiatong Zhu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Shan Hu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Lihua Liao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
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Caprioglio D, Mattoteia D, Muñoz E, Taglialatela‐Scafati O, Appendino G. One‐Pot Oxidative Heterofunctionalization of Resorcinolic Cannabinoids to Non‐thiophilic Aminocannabinoquinones. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Diego Caprioglio
- Dipartimento di Scienze del Farmaco Università degli Studi del Piemonte Orientale Largo Donegani 2 28100 Novara Italy
| | - Daiana Mattoteia
- Dipartimento di Scienze del Farmaco Università degli Studi del Piemonte Orientale Largo Donegani 2 28100 Novara Italy
| | - Eduardo Muñoz
- Instituto Maimónides de Investigación Biomédica de Córdoba 14004 Córdoba Spain
- Departamento de Biología Celular Fisiología e Inmunología Universidad de Córdoba 14071 Córdoba Spain
- Hospital Universitario Reina Sofía 14004 Córdoba Spain
| | | | - Giovanni Appendino
- Dipartimento di Scienze del Farmaco Università degli Studi del Piemonte Orientale Largo Donegani 2 28100 Novara Italy
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