1
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Teng QH, Lu FL, Wang K, Zhou LY, Li DP. Chemodivergent Photocatalyzed Heterocyclization of Hydrazones and Isothiocyanates for the Selectivity Synthesis of 2-Amino-1,3,4-thiadiazoles and 1,2,4-Triazole-3-thiones. J Org Chem 2023. [PMID: 37141629 DOI: 10.1021/acs.joc.3c00320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A photocatalytic chemodivergent reaction for the selectivity formation of C-S and C-N bonds in a controlled manner was proposed. The reaction medium, either neutral or acidic, is critical to dictate the formation of 2-amino-1,3,4-thiadiazoles and 1,2,4-triazole-3-thiones from isothiocyanates and hydrazones. This is a practical protocol to achieve the chemoselectivity under mild and metal-free conditions.
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Affiliation(s)
- Qing-Hu Teng
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Feng-Lai Lu
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
| | - Kai Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Li-Ya Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Dian-Peng Li
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
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2
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Liu Y, Wu W, Sang X, Xia Y, Fang G, Hao W. I 2-mediated Csp 2–P bond formation via tandem cyclization of o-alkynylphenyl isothiocyanates with organophosphorus esters. RSC Adv 2022; 12:18072-18076. [PMID: 35800309 PMCID: PMC9207709 DOI: 10.1039/d2ra03072a] [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: 05/16/2022] [Accepted: 06/07/2022] [Indexed: 11/21/2022] Open
Abstract
A highly efficient molecular-iodine-catalyzed cascade cyclization reaction has been developed, creating a series of 4H-benzo[d][1,3]thiazin-2-yl phosphonates in moderate to excellent yields. This approach benefits from metal-free catalysts and available raw materials.
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Affiliation(s)
- Yang Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Wenjin Wu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Xiaoyan Sang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Yu Xia
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Guojian Fang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
| | - Wenyan Hao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People's Republic of China
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3
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Shen J, Li S, Yao Z, Lin S, Cui X. Base-promoted Cyclization Reaction of o-Isothiocyanato Arylacetylenes and Aroylacetonitriles: Easy Access to Benzo[d][1,3]thiazines. Org Biomol Chem 2022; 20:7236-7240. [DOI: 10.1039/d2ob01424f] [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 green and efficient synthesis of benzo[d][1,3]thiazines through base-promoted cyclization reaction of o-isothiocyanato arylacetylenes with aroylacetonitriles has been developed. This protocol displays high step economy and efficiency, and tolerates various...
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4
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Zhang W, Li Y, Zhou H, Su X, Zhang X, Zhang W. One-pot, two-step synthesis of 3,4-dihydroquinazoline-2(1H)-thiones from o-azidobenzenealdehydes, aryl amines and carbon disulfide. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153361] [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]
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5
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Zeng T, Kong J, Wang H, Liu L, Chang W, Li J. Substituent‐Controlled Divergent Cascade Cycloaddition Reactions of Chalcones and Arylalkynols: Access to Spiroketals and
Oxa
‐Bridged Fused Heterocycles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Tianlong Zeng
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Jingyang Kong
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Hongkai Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Lingyan Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Weixing Chang
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Jing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Weijin Road 94#, Nankai District Tianjin 300071 People's Republic of China
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6
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An Z, Wang T, Liu Y, Ren Y, Yan R. A catalyst-free method for the synthesis of 1,4,2-dithiazoles from isothiocyanates and hydroxylamine triflic acid salts. Org Biomol Chem 2021; 19:6206-6209. [PMID: 34195750 DOI: 10.1039/d1ob00938a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalyst-free method for the preparation of 1,4,2-dithiazoles is developed by reactions of isothiocyanates with hydroxylamine triflic acid salts. This reaction achieves C-S, C-N, and S-N bond formation, and a range of products are obtained in moderate to good yields. The obvious feature is using shelf-stable hydroxylamine triflic acid salts as a N source to synthesize heterocycles under mild conditions.
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Affiliation(s)
- Zhenyu An
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| | - Ting Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| | - Yafeng Liu
- Chemical Science and Engineering College, North Minzu University, Yinchuan 750000, China
| | - Yi Ren
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
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7
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Su G, Thomson CJ, Yamazaki K, Rozsar D, Christensen KE, Hamlin TA, Dixon DJ. A bifunctional iminophosphorane squaramide catalyzed enantioselective synthesis of hydroquinazolines via intramolecular aza-Michael reaction to α,β-unsaturated esters. Chem Sci 2021; 12:6064-6072. [PMID: 33996002 PMCID: PMC8098679 DOI: 10.1039/d1sc00856k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
An efficient synthesis of enantioenriched hydroquinazoline cores via a novel bifunctional iminophosphorane squaramide catalyzed intramolecular aza-Michael reaction of urea-linked α,β-unsaturated esters is described. The methodology exhibits a high degree of functional group tolerance around the forming hydroquinazoline aryl core and wide structural variance on the nucleophilic N atom of the urea moiety. Excellent yields (up to 99%) and high enantioselectivities (up to 97 : 3 er) using both aromatic and less acidic aliphatic ureas were realized. The potential industrial applicability of the transformation was demonstrated in a 20 mmol scale-up experiment using an adjusted catalyst loading of 2 mol%. The origin of enantioselectivity and reactivity enhancement provided by the squaramide motif has been uncovered computationally using density functional theory (DFT) calculations, combined with the activation strain model (ASM) and energy decomposition analysis (EDA). The activation of both aromatic and aliphatic ureas as N-centered nucleophiles in intramolecular Michael addition reactions to α,β-unsaturated esters was achieved under bifunctional iminophosphorane squaramide superbase catalysis.![]()
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Affiliation(s)
- Guanglong Su
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Connor J Thomson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Ken Yamazaki
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK .,Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam De Boelelaan 1083, 1081 HV Amsterdam The Netherlands
| | - Daniel Rozsar
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Kirsten E Christensen
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Trevor A Hamlin
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam De Boelelaan 1083, 1081 HV Amsterdam The Netherlands
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
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8
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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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9
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Abstract
An important strategy for the efficient generation of diversity in molecular structures is the utilization of common starting materials in chemodivergent transformations. The most studied solutions for switching the chemoselectivity rely on the catalyst, ligand, additive, solvent, temperature, time, pressure, pH and even small modifications in the substrate. In this review article several processes have been selected such as inter- and intramolecular cyclizations, including carba-, oxa-, thia- and oxazacyclizations promoted mainly by Brønsted or Lewis acids, transition metals and organocatalysts, as well as radical reactions. Catalyst-controlled intra- and intermolecular cyclizations are mainly described to give five- and six-membered rings. Cycloaddition reactions involving (2+2), (3+2), (3+3), (4+1), (4+2), (5+2), (6+2) and (7+2) processes are useful reactions for the synthesis of cyclic systems using organocatalysts, metal catalysts and Lewis acid-controlled processes. Addition reactions mainly of carba- and heteronucleophiles to unsaturated conjugated substrates can give different adducts via metal catalyst-, Lewis acid- and solvent-dependent processes. Carbonylation reactions of amines and phenols are carried out via ligand-controlled transition metal-catalyzed multicomponent processes. Ring-opening reactions starting mainly from cyclopropanols, cyclopropenols and epoxides or aziridines are applied to the synthesis of acyclic versus cyclic products under catalyst-control mainly by Lewis acids. Chemodivergent reduction reactions are performed using dissolving metals, sodium borohydride or hydrogen transfer conditions under solvent control. Oxidation reactions include molecular oxygen under solvent control or using different dioxiranes, as well as chemodivergent palladium catalyzed cross-coupling reactions using boronic acids are applied to aromatic and allenic compounds. Other chemodivergent reactions such as alkylations and allylations under transition metal catalysis, dimerization of acetylenes, bromination of benzylic substrates, and A3-couplings are performed via catalyst- or reaction condition-dependent processes.
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Affiliation(s)
- Irina P Beletskaya
- Chemistry Department, M. V. Lomonosov Moscow University, Leminskie Gory 1, 119992 Moscow, Russia
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10
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Chakraborty A, Chowdhury T, Menéndez MI, Chattopadhyay T. Iron Complexes Anchored onto Magnetically Separable Graphene Oxide Sheets: An Excellent Catalyst for the Synthesis of Dihydroquinazoline-Based Compounds. ACS APPLIED MATERIALS & INTERFACES 2020; 12:38530-38545. [PMID: 32805955 DOI: 10.1021/acsami.0c08616] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work, a green, sustainable, and efficient protocol for the syntheses of dihydroquinazoline derivatives is proposed. Initially, three Schiff base complexes of iron containing the ligand (2,2-dimethylpropane-1,3-diyl)bis(azanylylidene)bis(methanylylidene)bis(2,4-Xphenol), where X = Cl (complex 1)/Br (complex 2)/I (complex 3), were synthesized, fully characterized, and used in the desired syntheses. Complex 1 excelled as a catalyst, closely followed by complexes 2 and 3. DFT calculations helped in rationalizing the role of the halide substituent in the ligand backbone as a relevant factor in the catalytic superiority of complex 1 over complexes 2 and 3 for the synthesis of the dihydroquinazoline derivatives. Finally, to facilitate catalyst recoverability and reusability, complex 1 was immobilized on GO@Fe3O4@APTES (GO, graphene oxide; APTES, 3-aminopropyltriethoxysilane) to generate GO@Fe3O4@APTES@FeL1 (GOTESFe). GOTESFe was thoroughly characterized through scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy and efficiently used for the synthesis of dihydroquinazoline derivatives. GOTESFe could be magnetically recovered and reused up to five cycles without compromising its catalytic efficiency. Therefore, immobilization of the chosen iron complex onto magnetic GO sheets offers an extremely competent route in providing a blueprint of a readily recoverable, reusable, robust, and potent catalyst for the synthesis of dihydroquinazoline-based compounds.
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Affiliation(s)
- Aratrika Chakraborty
- Department of Chemistry, University College of Science, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Tania Chowdhury
- Department of Chemistry, University College of Science, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - María Isabel Menéndez
- Departamento de Química Físicay Analítica, C/Julián Clavería, 8, Oviedo 33006, Spain
| | - Tanmay Chattopadhyay
- Department of Chemistry, Diamond Harbour Women's University, Diamond Harbour Road, Sarisha, South 24 Pgs, West Bengal 743368, India
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11
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Putta VPRK, Vodnala N, Gujjarappa R, Tyagi U, Garg A, Gupta S, Pujar PP, Malakar CC. Reagent-Controlled Divergent Synthesis of 2-Amino-1,3-Benzoxazines and 2-Amino-1,3-Benzothiazines. J Org Chem 2019; 85:380-396. [DOI: 10.1021/acs.joc.9b02384] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- V. P. Rama Kishore Putta
- Department of Medicinal Chemistry, Jubilant Biosys, Bangalore 560022, Karnataka, India
- Department of Chemistry, CHRIST (Deemed to be University), Bangalore 560029, India
| | - Nagaraju Vodnala
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Raghuram Gujjarappa
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Ujjawal Tyagi
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Aakriti Garg
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, Chunilal Bhawan, 168, Maniktala Main Road, Kolkata 700054, India
| | - Sreya Gupta
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, Chunilal Bhawan, 168, Maniktala Main Road, Kolkata 700054, India
| | - Prasad Pralhad Pujar
- Department of Chemistry, CHRIST (Deemed to be University), Bangalore 560029, India
| | - Chandi C. Malakar
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
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12
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Chen Q, Wang Y, Hua R. Base-Promoted Chemodivergent Formation of 1,4-Benzoxazepin-5(4 H)-ones and 1,3-Benzoxazin-4(4 H)-ones Switched by Solvents. Molecules 2019; 24:molecules24203773. [PMID: 31635103 PMCID: PMC6832296 DOI: 10.3390/molecules24203773] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/13/2019] [Accepted: 10/18/2019] [Indexed: 02/06/2023] Open
Abstract
The KOH-promoted chemodivergent benzannulation of ortho-fluorobenzamides with 2-propyn-1-ol can afford either 1,4-benzoxazepin-5(4H)-ones or 1,3-benzoxazin-4(4H)-ones in good yields with high selectivity, depending greatly upon the use of solvents. In the case of using DMSO, the intermolecular benzannulation produced seven-membered benzo-fused heterocycles of 1,4-benzoxazepin-5(4H)-ones, whereas in MeCN, the six-membered benzo-fused heterocycles of 1,3-benzoxazin-4(4H)-ones were formed. The KOH-promoted benzannulation proceeded most probably through the C–F nucleophilic substitution of ortho-fluorobenzamides with 2-propyn-1-ol to give the intermediate of ortho-[(2-propynyl)oxy]benzamide, which underwent the intramolecular hydroamidation in a different manner to afford either seven- or six-membered benzo-fused heterocycles.
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Affiliation(s)
- Qian Chen
- Department of Chemistry, Tsinghua University, Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Beijing 100084, China.
| | - Yunpeng Wang
- Department of Chemistry, Tsinghua University, Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Beijing 100084, China.
| | - Ruimao Hua
- Department of Chemistry, Tsinghua University, Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Beijing 100084, China.
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13
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Yan H, Xiao XQ, Hider RC, Ma Y. A Simple Metal-Free Cyclization for the Synthesis of 4-Methylene-3-Substituted Quinazolinone and Quinazolinthione Derivatives: Experiment and Theory. Front Chem 2019; 7:584. [PMID: 31475141 PMCID: PMC6706782 DOI: 10.3389/fchem.2019.00584] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 08/02/2019] [Indexed: 11/28/2022] Open
Abstract
A new series of 3-substituted 4-methylene-quinazolinthiones and 4-methylene-quinazolinones were synthesized in moderate to excellent yield through a simple reaction of 2-aminoacetophenones with isocyanates or isothiocyanates. The reaction shows good tolerance of many important functional groups in the presence of air and water under metal-free conditions. Only water is produced as a coproduct, rendering this “green” methodology a highly versatile and eco-friendly alternative to the existing methods for the construction of the quinazolinone/quinazolinthione framework. We have interpreted the reaction mechanism by use of quantum chemical calculations on the basis of state-of-the-art computational methods SMD-B3LYP-D3(BJ)/BS1//B3LYP/BS1.
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Affiliation(s)
- Huihui Yan
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou, China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xu-Qiong Xiao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, China
| | - Robert C Hider
- Institute of Pharmaceutical Science, King's College London, London, United Kingdom
| | - Yongmin Ma
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou, China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
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14
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Duan C, Yao Y, Ye L, Shi Z, Zhao Z, Li X. Highly stereoselective construction of tetrahydroquinolines via cascade aza-Michael-Michael reaction: Formal [4+2] cycloaddition of β,γ-unsaturated α-ketoesters with 2-aminochalcones. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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15
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Xu Y, Chang F, Cao W, Liu X, Feng X. Catalytic Asymmetric Chemodivergent C2 Alkylation and [3 + 2]-Cycloaddition of 3-Methylindoles with Aziridines. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02880] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yali Xu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Fenzhen Chang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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16
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Wu J, Kong Y, Liu L, Chang W, Li J. Metal-free multicomponent cascade reactions of homopropargylic amines and acyl chlorides as well as potassium thiocyanate and diiodine: an access to thiazine imides. Org Biomol Chem 2018; 16:5955-5959. [PMID: 30087977 DOI: 10.1039/c8ob01557k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A novel metal-free multicomponent cascade reaction was developed for the construction of thiazine imides. This four-component cascade reaction had advantages of mild reaction conditions, wide substrate scope and good atom economy. Four new bonds were formed in one pot via a 6-exo-dig iodothiolation cyclization of homopropargylic amines. The corresponding E-configurational thiazine imide products possess an exocyclic vinyliodide functional group.
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Affiliation(s)
- Jing Wu
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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17
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Wadhwa P, Kharbanda A, Sharma A. Thia-Michael Addition: An Emerging Strategy in Organic Synthesis. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700609] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Preeti Wadhwa
- Department of Chemistry; Indian Institute of Technology; Roorkee India
| | | | - Anuj Sharma
- Department of Chemistry; Indian Institute of Technology; Roorkee India
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18
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Dong JL, Wei PS, Yu LSH, Xie JW. Chemoselective Synthesis of Structurally Diverse 3,4-Dihydroquinazoline-2(1H)-thiones and 4H-Benzo[d][1,3]thiazines. J Org Chem 2018; 83:2219-2226. [PMID: 29363980 DOI: 10.1021/acs.joc.7b03120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient, mild, and substrate/catalyst-controlled chemoselective reaction of o-isothiocyanato-(E)-cinnamaldehyde with amines has been established, producing three types of six-membered heterocycles: 2-(4H-benzo[d][1,3]thiazin-4-yl)acetaldehydes, 2-(2-thioxo-1,2,3,4-tetrahydroquinazolin-4-yl)acetaldehydes, and (E)-4-(2-methoxyvinyl)-4H-benzo[d][1,3]thiazines. The reaction scopes were quite broad and excellent yield was achieved. This method is extremely efficient and practical and can be conducted on a gram-scale with slightly inferior reactivity under catalyst-free conditions at low cost, making it an ideal alternative to existing methods.
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Affiliation(s)
- Jian-Lian Dong
- Department of Chemistry and Life Science, Zhejiang Normal University , Jinhua 321004, P. R. China
| | - Pei-Shun Wei
- Department of Chemistry and Life Science, Zhejiang Normal University , Jinhua 321004, P. R. China
| | - Li-Si-Han Yu
- Department of Chemistry and Life Science, Zhejiang Normal University , Jinhua 321004, P. R. China
| | - Jian-Wu Xie
- Department of Chemistry and Life Science, Zhejiang Normal University , Jinhua 321004, P. R. China
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19
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Guo W, Zhao M, Tan W, Zheng L, Tao K, Liu L, Wang X, Chen D, Fan X. Visible Light-Promoted Three-Component Tandem Annulation for the Synthesis of 2-Iminothiazolidin-4-ones. J Org Chem 2018; 83:1402-1413. [DOI: 10.1021/acs.joc.7b02940] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wei Guo
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Mingming Zhao
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wen Tan
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lvyin Zheng
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Kailiang Tao
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lingxiu Liu
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xinyu Wang
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Deliang Chen
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaolin Fan
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
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20
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Zhou ZW, Jia FC, Xu C, Jiang SF, Wu YD, Wu AX. Temperature-Controlled Base-Promoted Cyclization for the Synthesis of 2-Amino-4H
-benzo[d
][1,3]thiazin-4-ones and 2-Thioxo-4(3H
)-quinazolinones. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700443] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhi-Wen Zhou
- Key Laboratory of Pesticide & Chemical Biology; Ministry of Education; College of Chemistry, Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 P. R. China
| | - Feng-Cheng Jia
- Key Laboratory of Pesticide & Chemical Biology; Ministry of Education; College of Chemistry, Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 P. R. China
| | - Cheng Xu
- Key Laboratory of Pesticide & Chemical Biology; Ministry of Education; College of Chemistry, Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 P. R. China
| | - Shi-Fen Jiang
- Key Laboratory of Pesticide & Chemical Biology; Ministry of Education; College of Chemistry, Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology; Ministry of Education; College of Chemistry, Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology; Ministry of Education; College of Chemistry, Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 P. R. China
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21
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Kumar Y, Jaiswal Y, Shaw M, Kumar A. Metal-Free Catalyst-Controlled Chemoselective Synthesis of Aryl α
-Ketoesters and Primary α
-Ketoamides from Aryl Acetimidates. ChemistrySelect 2017. [DOI: 10.1002/slct.201701322] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yogesh Kumar
- Department of Chemistry; Indian Institute of Technology Patna, Bihta; 801103 Bihar India
| | - Yogesh Jaiswal
- Department of Chemistry; Indian Institute of Technology Patna, Bihta; 801103 Bihar India
| | - Mukta Shaw
- Department of Chemistry; Indian Institute of Technology Patna, Bihta; 801103 Bihar India
| | - Amit Kumar
- Department of Chemistry; Indian Institute of Technology Patna, Bihta; 801103 Bihar India
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22
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Guo WS, Dou Q, Hou J, Wen LR, Li M. Synthesis of 6-Phosphorylated Phenanthridines by Mn(II)-Promoted Tandem Reactions of 2-Biaryl Isothiocyanates with Phosphine Oxides. J Org Chem 2017; 82:7015-7022. [DOI: 10.1021/acs.joc.7b00907] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei-Si Guo
- State
Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry
and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- State
Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266101, P. R. China
| | - Qian Dou
- State
Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry
and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jian Hou
- State
Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266101, P. R. China
| | - Li-Rong Wen
- State
Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry
and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Ming Li
- State
Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry
and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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23
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Liu JJ, Cheng L, Huang HY, Wei F, Wang D, Liu L. Unprecedented formation of 3-(tetrahydrofuran-2-yl)-4H-chromen-4-one in a reaction between 3,3a-dihydro-9H-furo[3,4-b]chromen-9-one and malononitrile. Org Biomol Chem 2017; 15:5078-5088. [PMID: 28580978 DOI: 10.1039/c7ob00904f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Chromone skeletons are widespread among natural products as well as bioactive molecules. Here, we describe an unprecedented reaction of furo[3,4-b]chromen-9-one with malononitrile to afford 3-(tetrahydrofuran-2-yl)-4H-chromen-4-ones. Experimental data suggest that a sequence of Michael/retro-Michael/nucleophilic addition is involved in this unprecedented transformation.
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Affiliation(s)
- Jie-Jie Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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