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Suresh S, Palla S, Chung DR, Chien HS, Du BX, Shinde J, Kavala V, Yao CF. Catalyst-free reactions of anilines with β-chloroenones: synthesis of α-chloroenaminones and 1,4-benzodiazepines. Org Biomol Chem 2024. [PMID: 39189549 DOI: 10.1039/d4ob00954a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
The Michael addition of anilines to β-chloroenones gives enaminones by the elimination of hydrochloric acid (HCl). These enaminones are transformed into α-chloroenaminones via in situ sp2 C-H functionalization. Anilines that are attached to an electron-donating group react more readily with β-chloroenone to give the corresponding products in excellent yields. A highly atom-economical method has been developed using dimethyl sulfoxide (DMSO) as a green oxidant and solvent. The desired α-functionalized enaminones are formed in good yields with excellent Z-selectivity. We have established the generality of this reaction with many substrates, and scaled-up reactions have been performed to showcase the practical applications. A catalyst-free double annulation of β-chloroenones with o-phenylenediamine has also been demonstrated for the synthesis of 1,4-benzodiazepine derivatives in moderate yields under mild reaction conditions.
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Affiliation(s)
- Sundaram Suresh
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
| | - Sowndarya Palla
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
| | - Dai-Ru Chung
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
| | - Hung-Sheng Chien
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
| | - Bo-Xun Du
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
| | - Jivan Shinde
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
| | - Veerababurao Kavala
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
| | - Ching-Fa Yao
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Rd, Taipei-11677, Taiwan, Republic of China.
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Sarkar FK, Kyndiah L, Gajurel S, Sarkar R, Jana S, Pal AK. A sustainable avenue for the synthesis of propargylamines and benzofurans using a Cu-functionalized MIL-101(Cr) as a reusable heterogeneous catalyst. Sci Rep 2023; 13:12908. [PMID: 37558730 PMCID: PMC10412598 DOI: 10.1038/s41598-023-40154-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 08/05/2023] [Indexed: 08/11/2023] Open
Abstract
A heterogeneous copper-catalyzed A3 coupling reaction of aldehydes, amines, and alkynes for the synthesis of propargylamines and benzofurans has been developed. Here, the modified metal-organic framework MIL-101(Cr)-SB-Cu complex was chosen as the heterogeneous copper catalyst and prepared via post-synthetic modification of amino-functionalized MIL-101(Cr). The structure, morphology, thermal stability, and copper content of the catalyst were determined by FT-IR, PXRD, SEM, TEM, EDX, TGA, XPS, and ICP-OES. The catalyst shows high catalytic activity for the aforementioned reactions under solvent-free reaction conditions. High yields, low catalyst loading, easy catalyst recovery and reusability with not much shrink in catalytic activity, and a good yield of 82% in gram-scale synthesis are some of the benefits of this protocol that drove it towards sustainability.
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Affiliation(s)
- Fillip Kumar Sarkar
- Department of Chemistry, Centre for Advanced Studies, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Lenida Kyndiah
- Department of Chemistry, Centre for Advanced Studies, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Sushmita Gajurel
- Department of Chemistry, Centre for Advanced Studies, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Rajib Sarkar
- Department of Chemistry, Centre for Advanced Studies, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Samaresh Jana
- Department of Chemistry, School of Applied Sciences, KIIT- Deemed to be University, Bhubaneswar, Odisha, 751024, India
| | - Amarta Kumar Pal
- Department of Chemistry, Centre for Advanced Studies, North-Eastern Hill University, Shillong, Meghalaya, 793022, India.
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Pourghasem S, Moeinpour F, Mohseni-Shahri FS. Cu(II)/polyimide linked COF: an effective mesoporous catalyst for solvent-free 1,5-benzodiazepine synthesis. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
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Teli S, Teli P, Soni S, Sahiba N, Agarwal S. Synthetic aspects of 1,4- and 1,5-benzodiazepines using o-phenylenediamine: a study of past quinquennial. RSC Adv 2023; 13:3694-3714. [PMID: 36756601 PMCID: PMC9890949 DOI: 10.1039/d2ra06045k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/09/2023] [Indexed: 01/27/2023] Open
Abstract
Benzodiazepines, seven-membered heterocyclic compounds having two nitrogen atoms at different positions, are ruling scaffolds in the area of pharmaceutical industry. They act as cardinal moieties in organic synthesis as well as in medicinal chemistry. Among the different benzodiazepines, 1,4- and 1,5-benzodiazepines play a far-reaching role in the field of biological activities such as anticonvulsion, anti-anxiety, sedation, and hypnotics. In the past few decades, researchers have conducted a lot of work on these moieties and developed broad, valuable, and significant approaches for their synthesis. In this review article, we recapitulate the systematic synthetic strategies of 1,4- and 1,5-benzodiazepines using o-phenylenediamine as a precursor over the past five years (2018-2022). This article will be helpful for scientists and researchers to examine and explore novel and efficient methods for the synthesis of these biologically active moieties.
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Affiliation(s)
- Sunita Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Pankaj Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Shivani Soni
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Nusrat Sahiba
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Shikha Agarwal
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
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Nandi S, Jamatia R, Sarkar R, Sarkar FK, Alam S, Pal AK. One‐Pot Multicomponent Reaction: A Highly Versatile Strategy for the Construction of Valuable Nitrogen‐Containing Heterocycles. ChemistrySelect 2022. [DOI: 10.1002/slct.202201901] [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)
- Sibaji Nandi
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Ramen Jamatia
- Department of Chemistry Rajiv Gandhi University, Rono Hills, Doimukh Arunachal Pradesh 791112 India
| | - Rajib Sarkar
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Fillip Kumar Sarkar
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Safiul Alam
- Department of Chemistry Aliah University, IIA/27, New Town Kolkata 700160 India
| | - Amarta Kumar Pal
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
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