1
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Das B, Dahiya A, Patel BK. Isothiocyanates: happy-go-lucky reagents in organic synthesis. Org Biomol Chem 2024; 22:3772-3798. [PMID: 38656266 DOI: 10.1039/d4ob00281d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Owing to their unique structural features, isothiocyanates (ITCs) are a class of highly useful and inimitable reagents as the -NCS group serves both as electrophile and nucleophile in organic synthesis. ITCs share a rich legacy in organic, medicinal, and combinatorial chemistry. Compared to their oxygen equivalents, isocyanates, ITCs are easily available, less unpleasant, and somewhat less harmful to work with (mild conditions) which makes them happy-go-lucky reagents. Functionalized ITCs can finely tune the reactivity of the -NCS group and thus can be exploited in the late-stage functionalization processes. This review's primary aim is to outline ITC chemistry in the construction and derivatization of heterocycles through the lens of sustainability. For ease and brevity, the sections are divided based on reactive centers present in functionalized ITCs and modes of cyclisation. Scrutinizing their probable unexplored directions for future research studies is also addressed.
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Affiliation(s)
- Bubul Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
- Department of Chemistry, Bagadhar Brahma Kishan College, Jalah, Assam 781327, India
| | - Anjali Dahiya
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
| | - Bhisma K Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
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2
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Huynh TN, Ong KTN, Dinh PT, Nguyen AT, Nguyen TT. Elemental Sulfur Promoted Cyclization of Aryl Hydrazones and Aryl Isothiocyanates Yielding 2-Imino-1,3,4-thiadiazoles. J Org Chem 2024; 89:3202-3210. [PMID: 38329896 DOI: 10.1021/acs.joc.3c02675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
We report a method for using elemental sulfur to facilitate the cyclization of aryl hydrazones and aryl isothiocyanates, affording biorelated 2-imino-1,3,4-thiadiazoles. Reactions progressed in the presence of elemental sulfur, N-methylmorpholine base, and DMSO solvent, while were tolerant of a wide range of functionalities including halogen, nitro, cyano, methylsulfonyl, and heterocyclic groups. The method appears to offer a general pathway for using simple, cheap, and stable reagents to afford triaryl-substituted 2-imino-1,3,4-thiadiazoles under relatively mild conditions.
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Affiliation(s)
- Tan N Huynh
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 84, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 84, Vietnam
| | - Khanh T N Ong
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 84, Vietnam
- VNU-HCM Key Laboratory for Functional Organic Materials, Ho Chi Minh City 84, Vietnam
| | - Phuong T Dinh
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 84, Vietnam
- VNU-HCM Key Laboratory for Functional Organic Materials, Ho Chi Minh City 84, Vietnam
| | - Anh T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 84, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 84, Vietnam
| | - Tung T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 84, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 84, Vietnam
- VNU-HCM Key Laboratory for Functional Organic Materials, Ho Chi Minh City 84, Vietnam
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3
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Kuznetsova JV, Tkachenko VT, Petrovskaya LM, Filkina ME, Shybanov DE, Grishin YK, Roznyatovsky VA, Tafeenko VA, Pestretsova AS, Yakovleva VA, Pokrovsky VS, Kukushkin ME, Beloglazkina EK. [3+2]-Cycloaddition of Nitrile Imines to Parabanic Acid Derivatives-An Approach to Novel Spiroimidazolidinediones. Int J Mol Sci 2023; 25:18. [PMID: 38203188 PMCID: PMC10778941 DOI: 10.3390/ijms25010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/14/2023] [Accepted: 12/16/2023] [Indexed: 01/12/2024] Open
Abstract
Approximately 1,3-Dipolar cycloaddition of imidazolidine derivatives containing exocyclic double bonds is a convenient method of creating spiro-conjugated molecules with promising anticancer activity. In this work, the derivatives of parabanic acid (2-thioxoimidazolidine-4,5-diones and 5-aryliminoimidazolidine-2,4-diones) were first investigated as dipolarophiles in the reactions with nitrile imines. The generation of nitrile imines was carried out either by the addition of tertiary amine to hydrazonoyl chlorides «drop by drop» or using the recently proposed diffusion mixing technique, which led to ~5-15% increases in target compound yields. It was found that the addition of nitrile imines to C=S or C=N exocyclic double bonds led to 1,2,4-thiazolines or triazolines and occurred regioselectively in accordance with the ratio of FMO coefficients of reactants. The yield of the resulting spiro-compound depended on the presence of alkyl substituents in the nitrile imine structure and was significantly decreased in reactions with imines with strong electron donor or electron-withdrawing groups. Some of the obtained compounds showed reasonable in vitro cytotoxicity. IC50 values were calculated for HCT116 (colon cancer) cells using the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) test.
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Affiliation(s)
- Juliana V. Kuznetsova
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Varvara T. Tkachenko
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Lada M. Petrovskaya
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Maria E. Filkina
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Dmitry E. Shybanov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Yuri K. Grishin
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Vitaly A. Roznyatovsky
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Viktor A. Tafeenko
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Anna S. Pestretsova
- Blokhin National Medical Research Center of Oncology, Ministry of Health of the Russian Federation, 115478 Moscow, Russia; (A.S.P.); (V.S.P.)
- Occupational Health Risks Lab, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Vera A. Yakovleva
- Department of Biochemistry, People’s Friendship University of Russia (RUDN University), 117198 Moscow, Russia;
| | - Vadim S. Pokrovsky
- Blokhin National Medical Research Center of Oncology, Ministry of Health of the Russian Federation, 115478 Moscow, Russia; (A.S.P.); (V.S.P.)
- Department of Biochemistry, People’s Friendship University of Russia (RUDN University), 117198 Moscow, Russia;
- Research Institute of Molecular and Cellular Medicine, People’s Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Maxim E. Kukushkin
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
| | - Elena K. Beloglazkina
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (J.V.K.); (V.T.T.); (L.M.P.); (M.E.F.); (D.E.S.); (Y.K.G.); (V.A.R.); (V.A.T.); (M.E.K.)
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4
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Zhu P, Zheng J, Yan J, Li Z, Li X, Geng H. Design, Synthesis, and Biological Evaluation of N'-Phenylhydrazides as Potential Antifungal Agents. Int J Mol Sci 2023; 24:15120. [PMID: 37894800 PMCID: PMC10606473 DOI: 10.3390/ijms242015120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/19/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Fifty-two kinds of N'-phenylhydrazides were successfully designed and synthesized. Their antifungal activity in vitro against five strains of C. albicans (Candida albicans) was evaluated. All prepared compounds showed varying degrees of antifungal activity against C. albicans and their MIC80 (the concentration of tested compounds when their inhibition rate was at 80%), TAI (total activity index), and TSI (total susceptibility index) were calculated. The inhibitory activities of 27/52 compounds against fluconazole-resistant fungi C. albicans 4395 and 5272 were much better than those of fluconazole. The MIC80 values of 14/52 compounds against fluconazole-resistant fungus C. albicans 5122 were less than 4 μg/mL, so it was the most sensitive fungus (TSIB = 12.0). A11 showed the best inhibitory activity against C. albicans SC5314, 4395, and 5272 (MIC80 = 1.9, 4.0, and 3.7 μg/mL). The antifungal activities of B14 and D5 against four strains of fluconazole-resistant fungi were better than those of fluconazole. The TAI values of A11 (2.71), B14 (2.13), and D5 (2.25) are the highest. Further exploration of antifungal mechanisms revealed that the fungus treated with compound A11 produced free radicals and reactive oxygen species, and their mycelium morphology was damaged. In conclusion, the N'-phenylhydrazide scaffold showed potential in the development of antifungal lead compounds. Among them, A11, B14, and D5 demonstrated particularly promising antifungal activity and held potential as novel antifungal agents.
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Affiliation(s)
- Panpan Zhu
- College of Chemistry & Pharmacy, Northwest A & F University, Yangling 712100, China
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Northwest A & F University, Yangling 712100, China
| | - Jinshuo Zheng
- College of Chemistry & Pharmacy, Northwest A & F University, Yangling 712100, China
| | - Jin Yan
- College of Chemistry & Pharmacy, Northwest A & F University, Yangling 712100, China
| | - Zhaoxia Li
- College of Chemistry & Pharmacy, Northwest A & F University, Yangling 712100, China
| | - Xinyi Li
- College of Chemistry & Pharmacy, Northwest A & F University, Yangling 712100, China
| | - Huiling Geng
- College of Chemistry & Pharmacy, Northwest A & F University, Yangling 712100, China
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Northwest A & F University, Yangling 712100, China
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5
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Santhosh C, Singh KR, Sheela K, Swaroop TR, Sadashiva MP. Regioselective Synthesis of 2,5-Disubstituted-1,3,4-thiadiazoles and 1,3,4-Oxadiazoles via Alkyl 2-(Methylthio)-2-thioxoacetates and Alkyl 2-Amino-2-thioxoacetates. J Org Chem 2023; 88:11486-11496. [PMID: 37523659 DOI: 10.1021/acs.joc.3c00589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
An acid-catalyzed regioselective cyclization reaction of 2,5-disubstituted-1,3,4-thiadiazoles and 1,3,4-oxadiazoles has been developed. The synthetic precursors alkyl 2-(methylthio)-2-thioxoacetates/alkyl 2-amino-2-thioxoacetates react efficiently with acyl hydrazides, which transformed into a series of dehydrative and desulfurative products with employment of p-TSA and AcOH through a regioselective cyclization process. The alkyl 2-amino-2-thioxoacetate pathway generates excellent yield among the mentioned procedures. The reported methods are operationally simplistic and highly efficient with metal-free conditions and demonstrate significant functional group compatibility. Regioselective cyclized products were confirmed by single-crystal X-ray diffraction studies.
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Affiliation(s)
| | - Krishna Ravi Singh
- Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru 570 006, India
| | - Kalleshappa Sheela
- Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru 570 006, India
| | - Toreshettahally R Swaroop
- Department of Studies in Organic Chemistry, University of Mysore, Manasagangotri, Mysuru 570 006, India
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6
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Kim SB, Maiti S, Park ES, Kim GY, Choun Y, Ahn SK, Kim JK, Kim J. One-Pot Synthesis of 1,3,4-Oxadiazines from Acylhydrazides and Allenoates. Molecules 2023; 28:molecules28093815. [PMID: 37175225 PMCID: PMC10180079 DOI: 10.3390/molecules28093815] [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: 03/30/2023] [Revised: 04/19/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
The framework of 1,3,4-oxadiazine is crucial for numerous bioactive molecules, but only a limited number of synthetic methods have been reported for its production. In 2015, Wang's group developed a 4-(dimethylamino)pyridine (DMAP)-catalyzed [2 + 4] cycloaddition of allenoates with N-acyldiazenes, which provided an atom-efficient route for 1,3,4-oxadiazines. However, the practicality of this method was limited by the instability of N-acyldiazenes as starting materials. Building upon our ongoing research about the aerobic oxidation of hydrazides and their synthetic applications, we hypothesized that aerobic oxidative cycloadditions using acylhydrazides instead of N-acyldiazenes may provide a more practical synthetic route for 1,3,4-oxadiazines. In this manuscript, we describe a one-pot synthetic protocol for 1,3,4-oxadiazines from acylhydrazides and allenoates. The developed one-pot protocol consists of aerobic oxidations of acylhydrazides into N-acyldiazenes using NaNO2 and HNO3, followed by the DMAP-catalyzed cycloaddition of allenoate with the generated N-acyldiazenes. A variety of 1,3,4-oxadiazines were produced in good to high yields. In addition, the practicality of the developed method was demonstrated by a gram-scale synthesis of 1,3,4-oxadiazine.
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Affiliation(s)
- Su Been Kim
- Department of Chemistry and Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Santanu Maiti
- Department of Chemistry and Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Eun Sun Park
- Department of Chemistry and Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Ga Young Kim
- Department of Chemistry and Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Yunji Choun
- Department of Chemistry and Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Soon Kil Ahn
- Institute for New Drug Development, Division of Life Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Jae Kwang Kim
- Division of Life Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Jinho Kim
- Department of Chemistry and Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea
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7
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Lim JH, Baek SE, Lad BS, Kim J. Synthesis of 2-Imino-1,3,4-oxadiazolines from Acylhydrazides and Isothiocyanates via Aerobic Oxidation and a DMAP-Mediated Annulation Sequence. ACS OMEGA 2022; 7:28148-28159. [PMID: 35990423 PMCID: PMC9386851 DOI: 10.1021/acsomega.2c02323] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 07/18/2022] [Indexed: 05/27/2023]
Abstract
In this work, an efficient synthesis of 2-imino-1,3,4-oxadiazolines from acylhydrazides and isothiocyanates is described. In the presence of 4-dimethylaminopyridine (DMAP) and molecular oxygen, various 2-imino-1,3,4-oxadiazolines were produced in good to high yields. The developed method showed a broad substrate scope and was effective on the gram scale. On the basis of the mechanistic studies and previous literature, it was proposed that the mechanism consists of an aerobic oxidation of acylhydrazides facilitated by DMAP and isothiocyanates, followed by a DMAP-mediated annulation of the in situ generated acyldiazenes with isothiocyanates.
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8
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Fang Y, Wang M, Hao W, Meng Y, Yu W, Chang J. Transition‐Metal‐Free N‐Functionalization of Benzimidazoles and Related Azaheterocycles with α‐Acyloxy Sulfides. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200502] [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]
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9
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One‐pot synthesis of 2‐imino‐1,3,4‐thiadiazolines from acylhydrazides and isothiocyanates. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Hao W, Li K, Ye C, Yu W, Chang J. Iodine-Mediated C═C Double Bond Cleavage toward Pyrido[2,1- b]quinazolinones. Org Lett 2022; 24:3286-3290. [PMID: 35446041 DOI: 10.1021/acs.orglett.2c01183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A transition-metal-free C═C double bond cleavage reaction employing molecular iodine is described. In the presence of K2CO3 as the base, I2-mediated C═C bond cleavage followed by intramolecular annulation of N-(2-vinylaryl)pyridin-2-amine substrates produces pyrido[2,1-b]quinazolinones and related heterocyclic compounds. This reaction can be completed on a gram scale and has been successfully applied to the synthesis of compounds with important biological properties, including efflux pump inhibitory and antiallergic activities.
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Affiliation(s)
- Wei Hao
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Kailu Li
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Chenyang Ye
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Wenquan Yu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Junbiao Chang
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
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11
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Guo W, Mei W, Liu G, Deng L, Zou X, Zhong Y, Zhuo X, Fan X, Zheng L. Base‐Promoted Three‐Component Cyclization and Coupling Strategy for the Synthesis of Substituted 3‐Aryl‐5‐thio‐1,3,4‐thiadiazole‐2‐thiones. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100745] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wei Guo
- Gannan Normal University Key Laboratory of Organo-pharmaceutical Chemistry of Jiangxi Province Economic & Technological Development Zone 341000 Ganzhou CHINA
| | - Weijie Mei
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
| | - Gongping Liu
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
| | - Ling Deng
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
| | - Xiaoying Zou
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
| | - Yumei Zhong
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
| | - Xiaoya Zhuo
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
| | - Xiaolin Fan
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
| | - Lvyin Zheng
- Gannan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province CHINA
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12
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Huang Z, Zhang Q, Yi X, Zhao Z, Yu W, Chang J. Synthesis of 2‐Imino‐1,3,4‐Selenadiazoles
via
Tributylphosphine‐Mediated Annulation of
N
‐Aroyldiazenes with Isoselenocyanates. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhengyan Huang
- Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou Henan Province 450001 People's Republic of China
| | - Qianqian Zhang
- Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou Henan Province 450001 People's Republic of China
| | - Xiaofei Yi
- Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou Henan Province 450001 People's Republic of China
| | - Zongxiang Zhao
- Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou Henan Province 450001 People's Republic of China
| | - Wenquan Yu
- Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou Henan Province 450001 People's Republic of China
| | - Junbiao Chang
- Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou Henan Province 450001 People's Republic of China
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13
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Wei Z, Zhang Q, Tang M, Zhang S, Zhang Q. Diversity-Oriented Synthesis of 1,2,4-Triazols, 1,3,4-Thiadiazols, and 1,3,4-Selenadiazoles from N-Tosylhydrazones. Org Lett 2021; 23:4436-4440. [PMID: 33988376 DOI: 10.1021/acs.orglett.1c01379] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The diversity-oriented synthesis of 1,2,4-triazols, 1,3,4-thiadiazols, and 1,3,4-selenadiazoles from N-tosylhydrazones was developed, and the reactions were general for a wide range of substrates, in which NH2CN, KOCN, KSCN, and KSeCN were used as odorless sources. Two different pathways were proposed, and N-tosylhydrazonoyl chlorides were formed in situ in the presence of NCS.
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Affiliation(s)
- Zeyang Wei
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qi Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Meng Tang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Siyu Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qian Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
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14
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Guo X, Chen X, Cheng Y, Chang X, Li X, Li P. Organocatalytic enantioselective [2 + 4]-annulation of γ-substituted allenoates with N-acyldiazenes for the synthesis of optically active 1,3,4-oxadiazines. Org Biomol Chem 2021; 19:1727-1731. [PMID: 33538742 DOI: 10.1039/d0ob02508a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective [2 + 4]-annulation of γ-substituted allenoates with N-acyldiazenes has been developed for the first time. In the presence of an l-proline-derived DMAP analogue, the annulation proceeded smoothly to afford a broad range of 1,3,4-oxadiazine derivatives in good to excellent yields with high stereoselectivities.
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Affiliation(s)
- Xing Guo
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China. and Department of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Hong Kong, China.
| | - Xuling Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Yuyu Cheng
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Xiaoyong Chang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Xuechen Li
- Department of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Hong Kong, China.
| | - Pengfei Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology, Shenzhen 518055, China.
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15
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Polina S, Putta VPRK, Gujjarappa R, Singh V, Pujar PP, Malakar CC. P(III)‐Mediated Cascade C‐N/C‐S Bond Formation: A Protocol towards the Synthesis of
N
,
S
‐Heterocycles and Spiro Compounds. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Saibabu Polina
- Department of Chemistry CHRIST (Deemed to be University) Bangalore 560029 India
| | | | - Raghuram Gujjarappa
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Virender Singh
- Department of Chemistry Central University of Punjab Bathinda 151001 Punjab India
| | | | - Chandi C. Malakar
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
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16
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Costa DP, Castro AC, Silva GA, Lima‐Junior CG, Andrade Júnior FP, Oliveira Lima E, Vaz BG, Silva LC. Microwave‐assisted synthesis and antimicrobial activity of novel spiro 1,3,4‐thiadiazolines from isatin derivatives. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Aleff Cruz Castro
- Department of Chemistry Federal University of Paraíba João Pessoa Brazil
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17
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Preparation of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles via chemoselective сyclocondensation of electrophilically activated nitroalkanes to (thio)semicarbazides or thiohydrazides. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02775-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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