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Halogen-free oxidation of aryl ketones and benzyl nitrile derivatives to corresponding carboxylic acids by using NaOH/ TBHP in aqueous medium. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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2
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Bi WZ, Zhang WJ, Li CY, Shao LH, Liu QP, Feng SX, Geng Y, Chen XL, Qu LB. Photoexcited sulfenylation of C(sp 3)-H bonds in amides using thiosulfonates. Org Biomol Chem 2022; 20:3902-3906. [PMID: 35502883 DOI: 10.1039/d2ob00557c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photoexcited sulfenylation of C(sp3)-H bonds in amides is developed for the synthesis of sulfenyl amides using thiosulfonates as a sulfur source. In the presence of easily available and inexpensive Na2-eosin Y, TBHP and K2CO3, various sulfenyl amides can be obtained under the irradiation of blue light at room temperature.
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Affiliation(s)
- Wen-Zhu Bi
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Wen-Jie Zhang
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Chen-Yu Li
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Lu-Hao Shao
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Qing-Pu Liu
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Su-Xiang Feng
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, 450046, China. .,Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases co-constructed by Henan province & Education Ministry of P. R. China, Zhengzhou, 450046, China
| | - Yang Geng
- Department of Pharmacy, Zhengzhou Railway Vocational and Technical College, Zhengzhou, 450046, China.
| | - Xiao-Lan Chen
- College of Chemistry, Zhengzhou University, Zhengzhou, 450052, China
| | - Ling-Bo Qu
- College of Chemistry, Zhengzhou University, Zhengzhou, 450052, China
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3
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Bari A, Khan ZA, Shahzad SA, Raza Naqvi SA, Khan SA, Amjad H, Iqbal A, Yar M. Design and syntheses of 7-nitro-2-aryl-4 H-benzo[ d][1,3]oxazin-4-ones as potent anticancer and antioxidant agents. J Mol Struct 2020; 1214:128252. [PMID: 32292211 PMCID: PMC7153534 DOI: 10.1016/j.molstruc.2020.128252] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/10/2020] [Accepted: 04/11/2020] [Indexed: 12/19/2022]
Abstract
A group of new nitro substituted benzoxazinones (3a-k) were synthesized from easily available 4-nitroanthranilic acid. All the synthesized compounds were characterized by FT-IR, 1H NMR, 13C NMR, mass spectrometry and elemental analysis. Anti-proliferative and pro-apoptotic potential of all the synthesized compounds (3a-k) was evaluated by MTT and Hoechst 33258 staining assay respectively whereas their antioxidant properties were determined via DPPH free radical scavenging assay. The most active compounds (3a, 3c and 3k) showed significant cytotoxic potential against HeLa cells with an inhibition of cell viability that ranged between 28.54 and 44.67% (P < 0.001). Albeit statistically different, the anti-proliferative effect of 3c was in close match with that of the reference drug doxorubicin. Likewise, the test compounds showed profound pro-apoptotic potential with an apoptotic index that ranged between 52.86 and 75.61%. Besides, the docking studies revealed a higher efficiency for compounds (3a and 3h) owing to their better affinity and inhibition constant (Ki = 4.397 and 3.713 nmol) respectively. The antioxidant potential of synthesized benzoxazinones (3a-k) was in close agreement with the experimental anticancer results with a percent inhibition from 34.45 to 85.93% as compared to standard (90.56%).
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Affiliation(s)
- Ayesha Bari
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
| | - Zulfiqar Ali Khan
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
- Corresponding author. Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan.
| | - Sohail Anjum Shahzad
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
- Corresponding author. Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan.
| | - Syed Ali Raza Naqvi
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
| | - Shakeel Ahmad Khan
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, China
| | - Hira Amjad
- Department of Chemistry, Government College University, Lahore, 54000, Pakistan
| | - Ahsan Iqbal
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Yar
- Interdisciplinary Research Center in Biomedical Materials, COMSATS University Islamabad, Lahore Campus, Lahore, 54000, Pakistan
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Debnath S, Das T, Gayen S, Ghosh T, Maiti DK. Iodine-Catalyzed Functionalization of Primary Aliphatic Amines to Oxazoles, 1,4-Oxazines, and Oxazinones. ACS OMEGA 2019; 4:20410-20422. [PMID: 31815245 PMCID: PMC6894181 DOI: 10.1021/acsomega.9b03501] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 11/01/2019] [Indexed: 05/10/2023]
Abstract
Unprecedented I2-catalyzed α,α-C(sp3)-H, decarboxylative α-C(sp3)-H, lactonized α-C(sp3)-H, and α,β-C(sp3)-H functionalized 5- and 6-annulation as well as α-C(sp3)-H activated 6-lactonization of primary aliphatic amines are devised under aerobic conditions. The metal-free sustainable strategy was employed for the diverse construction of valuable five-and six-membered polycyclic N,O-heteroaromatics such as oxazoles, 1,4-oxazines, and oxazin-2-one with a rapid reaction rate and high yield. The viability of this mild nonmetallic catalysis is successfully verified through syntheses of labile chiral heterocyclic analogues. In contrast to the common practice, this method is not limited to use of prefunctionalized amines, directing groups (DGs) and/or transient DGs, metal catalysts, and traditional oxidants. The possible mechanistic pathway of the annulation reaction is investigated by control experiments and ESI-MS data collected for a reaction mixture of the ongoing reaction. The synthesized new compounds are potent organic nanobuilding blocks to achieve valuable organic nanomaterials of different sizes, shapes, and dimensions, which are under investigation for the discovery of high-tech devices of innovative organic nanoelectronics and photophysical properties.
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Affiliation(s)
- Sudipto Debnath
- Department
of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Tuluma Das
- Department
of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Subrata Gayen
- Department
of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Tapas Ghosh
- Department
of Applied Sciences, Maulana Abul Kalam
Azad University of Technology, Haringhata 741249, West Bengal, India
| | - Dilip K. Maiti
- Department
of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
- E-mail:
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5
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Cai XH, Yang MZ, Xie B. Recent Investigations on the Functionalizations of C(sp3)-H Bonds Adjacent to a Heteroatom. LETT ORG CHEM 2019. [DOI: 10.2174/1570178616666190123131353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The selective functionalization of unactivated C(sp3)-H bonds has been regarded as an efficient
and atom-economical approach for the formation of carbon-carbon or carbon-heteroatom bonds
in modern organic synthesis. Especially, the oxidative activation of C(sp3)–H bonds adjacent to a heteroatom
exhibits quite significant features in synthetic chemistry. For example, the direct functionalizations
of amines, amides and ethers present important alternative tactics for the synthesis of various
novel and useful molecules from simple starting materials. Many remarkable achievements in the area
had continuously been made in the past decades. Here we reviewed recent investigations on the transformations
of C(sp3)-H bond adjacent to a heteroatom.
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Affiliation(s)
- Xiao-Hua Cai
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Meng-Zhi Yang
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Bing Xie
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
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Mukhopadhyay S, Barak DS, Batra S. TBHP as Methyl Source under Metal-Free Aerobic Conditions To Synthesize Quinazolin-4(3H
)-ones and Quinazolines by Oxidative Amination of C(sp3
)-H Bond. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800495] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Sushobhan Mukhopadhyay
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Sector 10; Jankipuram extension; Sitapur Road 226031 Lucknow- India
| | - Dinesh S. Barak
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Sector 10; Jankipuram extension; Sitapur Road 226031 Lucknow- India
| | - Sanjay Batra
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Sector 10; Jankipuram extension; Sitapur Road 226031 Lucknow- India
- Academy of Innovative Scientific Research; 110025 New Delhi India
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