1
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Abbasi M, Nowrouzi N, Sajedinia S. I 2-catalyzed one-pot oxidative condensation of thiourea, methyl ketones, and aryl thiols into 5-sulfenylated 2-amino-1,3-thiazoles by DMSO. Mol Divers 2023; 27:2887-2894. [PMID: 36515805 DOI: 10.1007/s11030-022-10585-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/04/2022] [Indexed: 12/15/2022]
Abstract
A one-pot, efficient oxidative-condensation process for constructing both 4-alkyl and 4-aryl-5-(arylthio) thiazol-2-amines using DMSO/I2 is introduced. In this procedure, methyl ketones, thiourea, DMSO, and thiols are reacted together in the presence of molecular I2 at 80 °C simply to produce 4-alkyl or aryl-5-(arylthio)thiazol-2-amines due to formation of a C-S bond between thiourea and methyl carbon linked to carbonyl group and the another C-S bond formation between thiol and thiazol ring. Under reaction conditions, both aryl and alkyl methyl ketones including acetophenone and substituted acetophenones also, 2-alkanones such as acetone, 2-butanone, 2-pentanone, and 2-heptanone yield those products successfully.
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Affiliation(s)
- Mohammad Abbasi
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr, 75169, Iran.
| | - Najmeh Nowrouzi
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr, 75169, Iran
| | - Sara Sajedinia
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr, 75169, Iran
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2
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Dhurey A, Mandal S, Pramanik A. I 2/DMSO-Promoted Synthesis of Diaryl Sulfide- and Selenide-Embedded Arylhydrazones. J Org Chem 2023; 88:5377-5390. [PMID: 37053514 DOI: 10.1021/acs.joc.2c02974] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
Functionalization and derivatization of arylhydrazones are important in pharmaceutical, medicinal, material, and coordination chemistry. In this regard, a facile I2/DMSO-promoted cross-dehydrogenative coupling (CDC) for direct sulfenylation and selenylation of arylhydrazones has been accomplished utilizing arylthiols/arylselenols at 80 °C. This method provides a metal-free benign route for the synthesis of a variety of arylhydrazones embedded with diverse diaryl sulfide and selenide moieties in good to excellent yield. In this reaction, molecular I2 acts as a catalyst, and DMSO is utilized as a mild oxidant as well as solvent to produce several sulfenyl and selenyl arylhydrazones through a CDC-mediated catalytic cycle.
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Affiliation(s)
- Arun Dhurey
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
| | - Subhro Mandal
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
| | - Animesh Pramanik
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
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3
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Hu X, Guo H, Jiang H, Zheng R, Zhou Y, Wang L. Visible-light-induced C(sp 3)-H thiocyanation of pyrazolin-5-ones: a practical synthesis of 4-thiocyanated 5-hydroxy-1 H-pyrazoles. Org Biomol Chem 2023; 21:2232-2235. [PMID: 36810647 DOI: 10.1039/d3ob00092c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
A direct, aerobic and visible light photocatalytic approach to synthesize 4-thiocyanated 5-hydroxy-1H-pyrazoles via cross-coupling of pyrazolin-5-ones with ammonium thiocyanate is described. Under redox-neutral and metal-free conditions, a series of 4-thiocyanated 5-hydroxy-1H-pyrazoles could be easily and efficiently obtained in good to high yields by using low-toxicity and inexpensive ammonium thiocyanate as the thiocyanate source.
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Affiliation(s)
- Xiurong Hu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China.,School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Haichang Guo
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Huajiang Jiang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Renhua Zheng
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Yaqin Zhou
- Department of Chemistry, Taizhou Jiaxin Metering and Testing Co. Ltd., Taizhou, Zhejiang 317000, P. R. China.
| | - Lei Wang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China. .,Department of Chemistry, Taizhou Jiaxin Metering and Testing Co. Ltd., Taizhou, Zhejiang 317000, P. R. China.
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4
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Fan W. I2/DMSO-mediated C(sp2)-S bond formation between heterocyclic enamines and triethylammonium thiolates. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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5
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Zheng Y, Liu ZW, Li T, Li X, Li SH. KIO 3-Mediated γ-C(sp 3)-H Sulfenylation of Enaminones. Org Lett 2022; 24:7533-7537. [PMID: 36219730 DOI: 10.1021/acs.orglett.2c02824] [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
A metal-free regioselective γ-C(sp3)-H sulfenylation of enaminones with heterocyclic thiols is reported. This transformation is efficient, mild, scalable, and environmentally friendly and tolerates a large variety of enaminones substrates and heterocyclic thiols. The utility of this strategy is demonstrated in a late-stage modification of bioactive natural products and drug derivatives.
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Affiliation(s)
- Yu Zheng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, P. R. China
| | - Zhi-Wei Liu
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology of Natural Products, Kunming Medical University, Kunming 650500, P. R. China
| | - Tao Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, and Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, P. R. China
| | - Xian Li
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology of Natural Products, Kunming Medical University, Kunming 650500, P. R. China
| | - Sheng-Hong Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, P. R. China.,State Key Laboratory of Southwestern Chinese Medicine Resources, and Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, P. R. China
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6
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Beukeaw D, Rattanasupaponsak N, Kittikool T, Phakdeeyothin K, Phomphrai K, Yotphan S. Metal‐Free Site‐Selective Direct Oxidative Phosphorylation of Pyrazolones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Recent Advances of Green Catalytic System I2/DMSO in C–C and C–Heteroatom Bonds Formation. Catalysts 2022. [DOI: 10.3390/catal12080821] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Developing a green, practical and efficient method for the formation of C–C and C–Heteroatom bonds is an important topic in modern organic synthetic chemistry. In recent years, the I2/DMSO catalytic system has attracted wide attention because of its green, high efficiency, atomic economy, low cost, mild reaction conditions and it is environment-friendly, which is more in line with the requirements of sustainable chemistry. Heteroatom-containing compounds have shown lots of important applications in pharmaceutical synthesis, agrochemicals, material chemistry and organic dyes. At present, the I2/DMSO catalytic system has been successfully applied to the synthesis of various heteroatom-containing compounds. The C–C and C–Heteroatom bonds have been formed efficiently, which has been proved to be a green and mild catalytic system. In this review, the research achievements of the I2/DMSO catalytic system in the formation of C–C and C–Heteroatom bonds from 2015 to date are described, and the research area is prospected. This review attempts to reveal the general law of iodine catalysis and lay a foundation for the design of new reactions.
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8
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Hong JE, Jung Y, Min D, Jang M, Kim S, Park J, Park Y. Visible-Light-Induced Organophotocatalytic Difunctionallization: Open-Air Hydroxysulfurization of Aryl Alkenes with Aryl Thiols. J Org Chem 2022; 87:7378-7391. [PMID: 35561230 DOI: 10.1021/acs.joc.2c00595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we report a regioselective visible-light-induced organophotoredox catalytic difunctionalization method to prepare β-hydroxysulfides using aryl alkenes and aryl thiols as substrates. The reaction provides a wide substrate scope of aryl alkenes (from simple styrene to complex bioactive compounds) and aryl thiols (from diverse heteroaromatic thiols to nonheteroaromatic thiols) (total 45 examples, up to 88% yield). Based on the combined experimental and computational studies, we demonstrate that in situ generated hydroperoxyl radicals from O2 in air react with benzylic radicals, which restrains the reaction between benzylic radicals and the acidic form of thiols in a classical thiol-ene radical reaction. We show that difunctionalization is possible due to the choice of bases, diluted substrate concentrations, increment in catalyst loading, and selection of suitable aryl thiols under aerobic conditions. Considering the biological importance of heteroaromatic thiols and the lack of methods to install them, our approach offers a platform to derive various β-hydroxysulfides that contain aromatic elements.
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Affiliation(s)
- Jee Eun Hong
- College of Pharmacy, Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Inje-ro, Gimhae, Gyeongnam 50834, Republic of Korea
| | - Yeonghun Jung
- College of Pharmacy, Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Inje-ro, Gimhae, Gyeongnam 50834, Republic of Korea
| | - Dahye Min
- College of Pharmacy, Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Inje-ro, Gimhae, Gyeongnam 50834, Republic of Korea
| | - Minji Jang
- College of Pharmacy, Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Inje-ro, Gimhae, Gyeongnam 50834, Republic of Korea
| | - Soomin Kim
- College of Pharmacy, Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Inje-ro, Gimhae, Gyeongnam 50834, Republic of Korea
| | - Jiyong Park
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Yohan Park
- College of Pharmacy, Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Inje-ro, Gimhae, Gyeongnam 50834, Republic of Korea
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9
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Feng Y, He J, Wei Y, Xie JW, Liu P. Iodine‐Promoted Tandem Pyrazole Annulation and C‐H Sulfenylation for the Synthesis of C4‐Sulfenylated Pyrazoles. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yijiao Feng
- Hunan University of Science and Engineering College of Chemistry and Bioengineering CHINA
| | - Jing He
- Shihezi University School of Chemistry and Chemical Engineering CHINA
| | - Yueting Wei
- Shihezi University School of Chemistry and Chemical Engineering CHINA
| | - Jian-Wei Xie
- School of Chemistry and Chemical Engineering Shihezi University North 4th Road 832003 Shihezi CHINA
| | - Ping Liu
- Shihezi University School of Chemistry and Chemical Engineering CHINA
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10
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Yang S, Zhao G, Gao Y, Sun Y, Zhang G, Fan X, Li Y, Li Y. In-solution direct oxidative coupling for the integration of sulfur/selenium into DNA-encoded chemical libraries. Chem Sci 2022; 13:2604-2613. [PMID: 35340849 PMCID: PMC8890091 DOI: 10.1039/d1sc06268a] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/29/2022] [Indexed: 12/27/2022] Open
Abstract
Sulfur/selenium-containing electron-rich arenes (ERAs) exist in a wide range of both approved and investigational drugs with diverse pharmacological activities. These unique chemical structures and bioactive properties, if combined with the emerging DNA-encoded chemical library (DEL) technique, would facilitate drug and chemical probe discovery. However, it remains challenging, as there is no general DNA-compatible synthetic methodology available for the formation of C-S and C-Se bonds in aqueous solution. Herein, an in-solution direct oxidative coupling procedure that could efficiently integrate sulfur/selenium into the ERA under mild conditions is presented. This method features simple DNA-conjugated electron-rich arenes with a broad substrate scope and a transition-metal free process. Furthermore, this synthetic methodology, examined by a scale-up reaction test and late-stage precise modification in a mock peptide-like DEL synthesis, will enable its utility for the synthesis of sulfur/selenium-containing DNA-encoded libraries and the discovery of bioactive agents.
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Affiliation(s)
- Shilian Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
| | - Guixian Zhao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
| | - Yuting Gao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
| | - Yang Sun
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
| | - Gong Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
| | - Xiaohong Fan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
- Pharmaceutical Department of Chongqing Three Gorges Central Hospital, Chongqing University Chongqing 404100 P. R. China
| | - Yangfeng Li
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
| | - Yizhou Li
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University Chongqing 401331 P. R. China
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University Chongqing 400044 P. R. China
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11
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Panigrahi A, Muniraj N, Prabhu KR. N-Triflination of pyrazolones: a new method for N-S bond formation. Org Biomol Chem 2021; 19:5534-5538. [PMID: 34105585 DOI: 10.1039/d1ob00862e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A simple method, which takes place quickly in 5 min, is developed for the N-triflination of pyrazolones using CF3SO2Na (Langlois reagent) and phenyliodine(iii)bis(trifluoroacetate) (PIFA). This reaction takes place at the imine nitrogen centre instead of the more reactive C4-position, forming a new N-S bond. A variety of pyrazolone derivatives were subjected to the reaction. Unlike the previous reports on sulfenylation or sulfonylation of pyrazolone, wherein the corresponding C-S bond is formed, this new method leads to the formation of the hetero-hetero atom bond (N-S bond) at room temperature.
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Affiliation(s)
- Ahwan Panigrahi
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Nachimuthu Muniraj
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
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12
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Zhang L, Nagaraju S, Paplal B, Lin Y, Liu S. Sulfonium Salts Enable the Direct Sulfenylation of Activated C(
sp
3
)−H Bonds. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001569] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Liang Zhang
- School of Pharmaceutical Sciences Shandong Analysis and Test Center Qilu University of Technology (Shandong Academy of Sciences) Jinan 250014 P. R. China
| | - Sakkani Nagaraju
- School of Pharmaceutical Sciences Shandong Analysis and Test Center Qilu University of Technology (Shandong Academy of Sciences) Jinan 250014 P. R. China
| | - Banoth Paplal
- School of Pharmaceutical Sciences Shandong Analysis and Test Center Qilu University of Technology (Shandong Academy of Sciences) Jinan 250014 P. R. China
| | - Yunliang Lin
- School of Pharmaceutical Sciences Shandong Analysis and Test Center Qilu University of Technology (Shandong Academy of Sciences) Jinan 250014 P. R. China
| | - Shuhua Liu
- School of Pharmaceutical Sciences Shandong Analysis and Test Center Qilu University of Technology (Shandong Academy of Sciences) Jinan 250014 P. R. China
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13
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Free-radical and electrophilic functionalization of pyrazol-3-ones with C–O or C–N bond formation (microreview). Chem Heterocycl Compd (N Y) 2021. [DOI: 10.1007/s10593-021-02885-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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14
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Prajapati RV, Prajapati VD, Purohit VB, Avalani JR, Kamani RD, Sapariya NH, Raval DK. Elemental sulfur and aryl iodides in copper(I)iodide catalyzed sulfenylation of 1-aryl-3-alkyl-1H-pyrazol-5(4H)-ones. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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15
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Chen X, Zhou X, Ji X, Huang H. Visible Light-Induced Aerobic Oxidative Dehydrogenative Coupling of Thiophenols. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202111037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Zhang H, Wang H, Jiang Y, Cao F, Gao W, Zhu L, Yang Y, Wang X, Wang Y, Chen J, Feng Y, Deng X, Lu Y, Hu X, Li X, Zhang J, Shi T, Wang Z. Recent Advances in Iodine-Promoted C-S/N-S Bonds Formation. Chemistry 2020; 26:17289-17317. [PMID: 32470225 DOI: 10.1002/chem.202001414] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/27/2020] [Indexed: 12/19/2022]
Abstract
Sulfur-containing scaffold, as a ubiquitous structural motif, has been frequently used in natural products, bioactive chemicals and pharmaceuticals, particularly C-S/N-S bonds are indispensable in many biological important compounds and pharmaceuticals. Development of mild and general methods for C-S/N-S bonds formation has great significance in modern research. Iodine and its derivatives have been recognized as inexpensive, environmentally benign and easy-handled catalysts or reagents to promote the construction of C-S/N-S bonds under mild reaction conditions, with good regioselectivities and broad substrate scope. Especially based on this, several new strategies, such as oxidation relay strategy, have been greatly developed and accelerated the advancement of this field. This review focuses on recent advances in iodine and its derivatives promoted hybridized C-S/N-S bonds formation. The features and mechanisms of corresponding reactions are summarized and the results of some cases are compared with those of previous reports. In addition, the future of this domain is discussed.
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Affiliation(s)
- Honghua Zhang
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Huihong Wang
- State Key Laboratory of Applied Organic Chemistry, College of, Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, P. R. China
| | - Yi Jiang
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Fei Cao
- State Key Laboratory of Applied Organic Chemistry, College of, Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, P. R. China
| | - Weiwei Gao
- State Key Laboratory of Applied Organic Chemistry, College of, Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, P. R. China
| | - Longqing Zhu
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Yuhang Yang
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Xiaodong Wang
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Yongqiang Wang
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Jinhong Chen
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Yiyue Feng
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Xuemei Deng
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Yingmei Lu
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Xiaoling Hu
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Xiangxiang Li
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Juan Zhang
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Tao Shi
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China
| | - Zhen Wang
- School of Pharmacy, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, P. R. China.,State Key Laboratory of Applied Organic Chemistry, College of, Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, P. R. China
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17
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Oda R, Nakata K. Chemodivergent Dehydrative Nucleophilic Substitutions of Diarylmethanols with 1‐Phenyl‐1
H
‐tetrazole‐5‐thiol Catalyzed by FeCl
3. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ryoga Oda
- Department of ChemistryGraduate School of Natural Science and TechnologyShimane University 1060 Nishikawatsu Matsue Shimane 690-8504 Japan
| | - Kenya Nakata
- Department of ChemistryGraduate School of Natural Science and TechnologyShimane University 1060 Nishikawatsu Matsue Shimane 690-8504 Japan
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18
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Yu X, Shang YZ, Cheng YF, Tian J, Niu Y, Gao WC. Synthesis of 4-chalcogenyl pyrazoles via electrophilic chalcogenation/cyclization of α,β-alkynic hydrazones. Org Biomol Chem 2020; 18:1806-1811. [PMID: 32096526 DOI: 10.1039/d0ob00050g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile method for the synthesis of 4-chalcogenylated pyrazoles has been developed via electrophilic chalcogenation/cyclization of α,β-alkynic hydrazones. The cyclization of α,β-alkynic aldehyde hydrazones could be induced by using either sulfenyl chloride or the S-electrophiles generated in situ from the reaction of NCS and arythiol. The developed method was successfully applied to the synthesis of the sulfenyl analogue of celecoxib.
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Affiliation(s)
- Xinzhang Yu
- Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan, 030008, P.R. China.
| | - Yu-Zhu Shang
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P.R. China.
| | - Yu-Fei Cheng
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P.R. China.
| | - Jun Tian
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P.R. China.
| | - Yulan Niu
- Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan, 030008, P.R. China.
| | - Wen-Chao Gao
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P.R. China.
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19
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Xu XM, Chen DM, Wang ZL. Recent advances in sulfenylation of C(sp3) H bond under transition metal-free conditions. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.05.048] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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20
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Tanimoto K, Ohkado R, Iida H. Aerobic Oxidative Sulfenylation of Pyrazolones and Pyrazoles Catalyzed by Metal-Free Flavin–Iodine Catalysis. J Org Chem 2019; 84:14980-14986. [DOI: 10.1021/acs.joc.9b02422] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Kazumasa Tanimoto
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Ryoma Ohkado
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Hiroki Iida
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
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21
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Bodhak C, Pramanik A. One-Pot, Three-Component Synthesis of 5-Sulfenyl-2-iminothiazolines by Cross-Dehydrogenative C–S Coupling Using I2/DMSO in Open Air. J Org Chem 2019; 84:7265-7278. [DOI: 10.1021/acs.joc.9b00785] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chandan Bodhak
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
| | - Animesh Pramanik
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
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22
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Magnetically Recyclable Nano Nickel Ferrite Catalyzed One-pot Chalcogenation of Bioactive Heterocycles Under Aerobic Condition. ChemistrySelect 2019. [DOI: 10.1002/slct.201804039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Parvatkar PT, Manetsch R, Banik BK. Metal-Free Cross-Dehydrogenative Coupling (CDC): Molecular Iodine as a Versatile Catalyst/Reagent for CDC Reactions. Chem Asian J 2018; 14:6-30. [DOI: 10.1002/asia.201801237] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 09/21/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Prakash T. Parvatkar
- Department of Chemistry and Chemical Biology; Northeastern University, 102 Hurtig Hall; 360 Huntington Avenue Boston MA 02115 USA
| | - Roman Manetsch
- Department of Chemistry and Chemical Biology; Northeastern University, 102 Hurtig Hall; 360 Huntington Avenue Boston MA 02115 USA
- Department of Pharmaceutical Sciences; Northeastern University, 102 Hurtig Hall; 360 Huntington Avenue Boston MA 02115 USA
| | - Bimal K. Banik
- Community Health System of South Texas; 3135 South Sugar Road Edinburg TX 78539 USA
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24
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Siddaraju Y, Prabhu KR. Iodine-Catalyzed Chemoselective C–N Bond-Forming Reactions Using Benzylic or Cinnamyl Alcohols with Heterocyclic Thiols and Thiones. J Org Chem 2018; 83:11145-11153. [DOI: 10.1021/acs.joc.8b01745] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yogesh Siddaraju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
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25
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Siddaraju Y, Prabhu KR. Iodine-Catalyzed Chemoselective Hydroamination Reaction Using 5-Mercaptotetrazoles Derivatives. ACS OMEGA 2018; 3:4908-4917. [PMID: 31458707 PMCID: PMC6641749 DOI: 10.1021/acsomega.8b00499] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 04/25/2018] [Indexed: 06/10/2023]
Abstract
Metal-free chemoselective hydroamination of styrene derivatives has been achieved with high chemoselectivity over sulfenylation of 1H-tetrazole-5-thiol using a catalytic amount of iodine. The scope of this methodology has been extended for the hydroamination of α-substituted styrene derivatives. This reaction involves a single-step C-N-bond formation under atom economical process. This eco-friendly method uses readily available and inexpensive iodine in a catalytic amount.
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26
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Li B, Chen Z, Cao H, Zhao H. Transition-Metal-Free Regioselective Cross-Coupling: Controlled Synthesis of Mono- or Dithiolation Indolizines. Org Lett 2018; 20:3291-3295. [DOI: 10.1021/acs.orglett.8b01168] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Bin Li
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Zhiyu Chen
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Hua Cao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Hong Zhao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
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27
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Pan WC, Liu JQ, Wang XS. Study on the iodine-catalyzed reaction of 3-aminopyrazine-2-carbohydrazide and 2-(arylethynyl)benzaldehydes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Zhang R, Jin S, Wan Y, Lin S, Yan Z. HBr/H 2 O 2 -mediated formation of C–S bond with thiosulfates. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.055] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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29
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Pathare RS, Patil V, Kaur H, Maurya AK, Agnihotri VK, Khan S, Devunuri N, Sharon A, Sawant DM. Iodine-catalyzed cross-coupling of isocyanides and thiols for the synthesis of S-thiocarbamates. Org Biomol Chem 2018; 16:8263-8266. [DOI: 10.1039/c8ob01855c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Synthesis of S-thiocarbamates by employing simple and readily available precursors under mild reaction conditions with good to excellent yields.
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Affiliation(s)
- Ramdas S. Pathare
- School of Chemical Sciences and Pharmacy
- Central University of Rajasthan
- Ajmer-305817
- India
| | - Vikas Patil
- Vignans Foundation for Science
- Technology & Research
- Guntur-522 213
- India
| | - Harpreet Kaur
- Department of Chemistry
- Birla Institute of Technology
- Ranchi
- India
| | - Antim K. Maurya
- Natural Product Chemistry and Process Development Division
- CSIR-Institute of Himalayan Bioresource Technology
- Palampur
- India
| | - Vijai K. Agnihotri
- Natural Product Chemistry and Process Development Division
- CSIR-Institute of Himalayan Bioresource Technology
- Palampur
- India
| | - Shahnawaz Khan
- Department of Chemistry
- Bhupal Noble's University
- Udaipur-313001
- India
| | - Nagaraju Devunuri
- Vignans Foundation for Science
- Technology & Research
- Guntur-522 213
- India
| | - Ashoke Sharon
- Department of Chemistry
- Birla Institute of Technology
- Ranchi
- India
| | - Devesh M. Sawant
- School of Chemical Sciences and Pharmacy
- Central University of Rajasthan
- Ajmer-305817
- India
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30
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He W, Ding Y, Tu J, Que C, Yang Z, Xu J. Thermal conversion of primary alcohols to disulfidesviaxanthate intermediates: an extension to the Chugaev elimination. Org Biomol Chem 2018; 16:1659-1666. [DOI: 10.1039/c8ob00024g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Heating primaryO-alkylS-difluoro(ethoxycarbonyl)methyl xanthates yields disulfides. This extends to the Chugaev elimination.
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Affiliation(s)
- Wei He
- State Key Laboratory of Chemical Resource Engineering
- Department of Organic Chemistry
- Faculty of Science
- Beijing University of Chemical Technology
- Beijing 100029
| | - Yong Ding
- State Key Laboratory of Chemical Resource Engineering
- Department of Organic Chemistry
- Faculty of Science
- Beijing University of Chemical Technology
- Beijing 100029
| | - Jianzhuo Tu
- State Key Laboratory of Chemical Resource Engineering
- Department of Organic Chemistry
- Faculty of Science
- Beijing University of Chemical Technology
- Beijing 100029
| | - Chuqiang Que
- State Key Laboratory of Chemical Resource Engineering
- Department of Organic Chemistry
- Faculty of Science
- Beijing University of Chemical Technology
- Beijing 100029
| | - Zhanhui Yang
- State Key Laboratory of Chemical Resource Engineering
- Department of Organic Chemistry
- Faculty of Science
- Beijing University of Chemical Technology
- Beijing 100029
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering
- Department of Organic Chemistry
- Faculty of Science
- Beijing University of Chemical Technology
- Beijing 100029
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31
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Reddy RJ, Waheed M, Kumar JJ. A straightforward and convenient synthesis of functionalized allyl thiosulfonates and allyl disulfanes. RSC Adv 2018; 8:40446-40453. [PMID: 35558195 PMCID: PMC9091482 DOI: 10.1039/c8ra06938g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 11/17/2018] [Indexed: 11/24/2022] Open
Abstract
A practical, highly flexible and eco-friendly method has been developed for the synthesis of allyl thiosulfonates using Morita–Baylis–Hillman (MBH) allyl bromides and sodium arylthiosulfonates, which were readily assembled without any reagent/catalyst. Moreover, the allyl thiosulfonates were successfully transformed into a set of two synthetically viable diallyl disulfanes and unsymmetrical allyl disulfanes in the presence of Cs2CO3. The present protocols are operationally simple and convenient to generate a wide range of functionalized allyl thiosulfonates and allyl disulfanes in good to excellent yields. A practical, highly efficient and eco-friendly method for synthesis of multifunctional allyl thiosulfonates and allyl disulfanes is reported under mild reaction conditions.![]()
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Affiliation(s)
| | - Md. Waheed
- Department of Chemistry
- Osmania University
- Hyderabad 500 007
- India
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32
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Toonchue S, Sumunnee L, Phomphrai K, Yotphan S. Metal-free direct oxidative C–C bond coupling of pyrazolones and quinoxalinones. Org Chem Front 2018. [DOI: 10.1039/c8qo00328a] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
An efficient oxidative dehydrogenative coupling of quinoxalinones and pyrazolones has been successfully developed using a readily available persulfate oxidant. This protocol provides facile access to a wide array of hydroxy-pyrazolyl quinoxalinones in good to excellent yields.
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Affiliation(s)
- Saowanee Toonchue
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Department of Chemistry
- Faculty of Science
- Mahidol University
- Bangkok
| | - Ladawan Sumunnee
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Department of Chemistry
- Faculty of Science
- Mahidol University
- Bangkok
| | - Khamphee Phomphrai
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology (VISTEC)
- Wangchan
- Thailand
| | - Sirilata Yotphan
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Department of Chemistry
- Faculty of Science
- Mahidol University
- Bangkok
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33
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Thupyai A, Pimpasri C, Yotphan S. DABCO-catalyzed silver-promoted direct thiolation of pyrazolones with diaryl disulfides. Org Biomol Chem 2018; 16:424-432. [DOI: 10.1039/c7ob02860a] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Efficient direct thiolation of N-substituted pyrazolones with diaryl disulfides was developed using a combination of DABCO and AgOAc to assist C–S bond formation.
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Affiliation(s)
- Akkharaphong Thupyai
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Department of Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
| | - Chaleena Pimpasri
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Department of Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
| | - Sirilata Yotphan
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Department of Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
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34
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Shakoor SMA, Agarwal DS, Khullar S, Mandal SK, Sakhuja R. Solvent-Driven Iodine-Mediated Oxidative Strategies for the Synthesis of Bis(imidazo[1,2-a
]pyridin-3-yl)sulfanes and Disulfanes. Chem Asian J 2017; 12:3061-3068. [DOI: 10.1002/asia.201701274] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/25/2017] [Indexed: 11/06/2022]
Affiliation(s)
- S. M. Abdul Shakoor
- Department of Chemistry; Birla Institute of Technology & Science; Pilani Rajasthan 333031 India
| | - Devesh S. Agarwal
- Department of Chemistry; Birla Institute of Technology & Science; Pilani Rajasthan 333031 India
| | - Sadhika Khullar
- Department of Chemistry; D.A.V. University, Jalandhar-; Pathankot National Highway Jalandhar- 144012 Punjab India
| | - Sanjay K. Mandal
- Department of Chemical Sciences; Indian Institute of Science Education and Research Mohali; Sector 81, S.A.S. Nagar, Manuali P.O. Punjab 140306 India
| | - Rajeev Sakhuja
- Department of Chemistry; Birla Institute of Technology & Science; Pilani Rajasthan 333031 India
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35
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Direct construction of sulfenylated pyrazoles catalyzed by I 2 at room temperature. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(17)62901-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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36
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Chen Q, Wang X, Wen C, Huang Y, Yan X, Zeng J. Cs2CO3-promoted cross-dehydrogenative coupling of thiophenols with active methylene compounds. RSC Adv 2017. [DOI: 10.1039/c7ra06904a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
α-Sulfenylation of carbonyl compounds has been achieved via Cs2CO3-promoted aerobic cross-dehydrogenative coupling of thiophenols with active methylene compounds.
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Affiliation(s)
- Qian Chen
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
| | - Xiaofeng Wang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- China
| | - Chunxiao Wen
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- China
| | - Yulin Huang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- China
| | - Xinxing Yan
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- China
| | - Jiekun Zeng
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- China
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37
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Mukherjee P, Das AR. One-flask synthesis of pyrazolone thioethers involving catalyzed and uncatalyzed thioetherification pathways of pyrazolones. Org Biomol Chem 2017; 15:7267-7271. [DOI: 10.1039/c7ob01754e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-pot thioetherification of pyrazolones through cross-coupling as well as an aromatic SN2 pathway using elemental sulfur as the sulfur source.
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Affiliation(s)
- Prasun Mukherjee
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
| | - Asish R. Das
- Department of Chemistry
- University of Calcutta
- Kolkata-700009
- India
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