1
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Jamis-Oliva O, López R, Galdámez A, Gallardo-Fuentes S, Vilches-Herrera M. Non-covalent interactions in the diastereoselective synthesis of cis-2,3-dihydrobenzofurans: experimental and computational studies. Org Biomol Chem 2024; 22:1441-1446. [PMID: 38265299 DOI: 10.1039/d3ob02070c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
The diastereoselective synthesis of 2,3-DHBs has been previously reported via an intramolecular Michael addition reaction using alkali bases such as Cs2CO3 and K2CO3. However, no systematic study has been performed to understand the possible role of bases in the mechanism of the reaction and factors behind the stereoselective outcome of the reaction. Herein, from experimental and theoretical points of view, we disclose the role of the cesium salt in the rate-determining step along the catalytic cycle and the key role of stabilizing non-covalent interactions in the stereoselective outcome of the reaction.
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Affiliation(s)
- Omar Jamis-Oliva
- Faculty of Sciences, University of Chile, Department of Chemistry, Las Palmeras 3425, Ñuñoa, 7750000, Santiago, Chile.
| | - Roger López
- Faculty of Sciences, University of Chile, Department of Chemistry, Las Palmeras 3425, Ñuñoa, 7750000, Santiago, Chile.
| | - Antonio Galdámez
- Faculty of Sciences, University of Chile, Department of Chemistry, Las Palmeras 3425, Ñuñoa, 7750000, Santiago, Chile.
| | - Sebastián Gallardo-Fuentes
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Avenida Universidad 330, Curauma, 2373223, Valparaíso, Chile
| | - Marcelo Vilches-Herrera
- Faculty of Sciences, University of Chile, Department of Chemistry, Las Palmeras 3425, Ñuñoa, 7750000, Santiago, Chile.
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2
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Zhang J, He Z. Lewis Base-Catalyzed Intramolecular Vinylogous Aldol Reaction and Chemoselective Syntheses of 3-Hydroxy-2,3-Disubstituted Dihydrobenzofurans and Indolines. J Org Chem 2023; 88:13102-13114. [PMID: 37672638 DOI: 10.1021/acs.joc.3c01313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
A Lewis base-catalyzed intramolecular vinylogous aldol reaction of o-(allyloxy)phenyl ketoesters or o-(allylamino)phenyl ketoesters has been developed. This reaction provides ready access to 3-hydroxy-2,3-disubstituted dihydrobenzofurans and indolines in high yields with excellent chemoselectivity and diastereoselectivity. An acid-promoted dehydration of such products further extends the utility of the reaction to the synthesis of 2-alkenyl benzofurans and indoles.
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Affiliation(s)
- Jiayong Zhang
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Institute of Marine Biomedicine/Postdoctoral Innovation Practice Base, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Zhengjie He
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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3
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Subbi Reddy M, Nanubolu JB, Suresh S. Design and development of intramolecular doubly vinylogous Michael addition to access 3-aryl substituted 2-alkenyl-benzofurans and -indoles. Org Biomol Chem 2023. [PMID: 37326590 DOI: 10.1039/d3ob00861d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Herein, we have disclosed a rare example of an intramolecular doubly vinylogous Michael addition (DVMA). The reaction design exploits the innate reactivity of ortho-heteroatom substituted para-quinone methide (p-QM) derivatives. The sequential reaction of p-QMs and activated allyl halides proceeds through heteroatom-allylation, DVMA and oxidation to furnish a diverse range of 2-alkenyl benzofuran and 2-alkenyl indole derivatives in high yields.
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Affiliation(s)
- Manyam Subbi Reddy
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jagadeesh Babu Nanubolu
- Laboratory of X-Ray Crystallography, Department of Analytical Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - Surisetti Suresh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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4
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GaCl3 catalyzed the cascade Michael/ketalization of o-hydroxychalcones with indoline-2-thiones: For the construction of indole-annulated 2-oxa-8-thiabicyclo[3.3.1]nonane derivatives. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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5
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Gummidi L, Muddassar A, Sharma GVM, Murugesh V, Suresh S. Tandem aza-Michael addition-vinylogous aldol condensation: synthesis of N-bridged pyridine fused quinolones. Org Biomol Chem 2022; 20:773-777. [PMID: 34991153 DOI: 10.1039/d1ob02087k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Herein, we present a tandem aza-Michael addition-vinylogous aldol condensation strategy for the synthesis of N-bridged pyridine fused quinolone derivatives from quinolones and ynones. The presented tandem transformation features the construction of C-N and CC bonds in a single operation, under transition metal-free conditions. The wide substrate scope and gram scale synthesis of pyridine fused quinolone derivatives expand the synthetic value of the presented protocol.
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Affiliation(s)
- Lalitha Gummidi
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
| | - Altaf Muddassar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
| | - Gangavaram V M Sharma
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
| | - V Murugesh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Surisetti Suresh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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6
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Collett CJ, Young CM, Massey RS, O'Donoghue AC, Smith AD. Kinetic and Structure‐Activity Studies of the Triazolium Ion‐ Catalyzed Intramolecular Stetter Reaction. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100384] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Christopher J. Collett
- EaStCHEM School of Chemistry University of St. Andrews North Haugh, St. Andrews KY16 9ST UK
| | - Claire M. Young
- EaStCHEM School of Chemistry University of St. Andrews North Haugh, St. Andrews KY16 9ST UK
| | - Richard S. Massey
- Department of Chemistry Durham University South Road Durham DH1 3LE UK
| | | | - Andrew D. Smith
- EaStCHEM School of Chemistry University of St. Andrews North Haugh, St. Andrews KY16 9ST UK
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7
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Chang M, Chen K. Bi(OTf)
3
‐Mediated (4+1) Annulation of α‐Sulfonyl
o
‐Hydroxyacetophenones with α‐Hydroxy Arylketones to Access Sulfonyl 2‐Aroylbenzofurans. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Meng‐Yang Chang
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung 807 Taiwan
- Department of Medical Research Kaohsiung Medical University Hospital Kaohsiung 807 Taiwan
| | - Kuan‐Ting Chen
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung 807 Taiwan
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8
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Kaur N, Singh P, Banerjee P. Vinylogous Aza‐Michael Addition of Urea Derivatives with
p
‐Quinone Methides Followed by Oxidative Dearomative Cyclization: Approach to Spiroimidazolidinone Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Navpreet Kaur
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001 India
| | - Priyanka Singh
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001 India
| | - Prabal Banerjee
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001 India
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9
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Park E, Park J, Cheon C. Remarkable Differences in Reactivity between Cyanide and N‐Heterocyclic Carbene
s
in
Ring‐Closing
Reactions of 4‐(
2‐Formylphenoxy
)but‐2‐Enoate Derivatives. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Eunjoon Park
- Department of Chemistry Korea University Seoul 02841 Korea
| | - Jina Park
- Department of Chemistry Korea University Seoul 02841 Korea
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10
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Satyam K, Ramarao J, Suresh S. N-Heterocyclic carbene (NHC)-catalyzed intramolecular benzoin condensation-oxidation. Org Biomol Chem 2021; 19:1488-1492. [PMID: 33522549 DOI: 10.1039/d0ob02606a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
NHC-Catalyzed intramolecular benzoin condensation-oxidation is developed for the expedient synthesis of diverse cyclic 1,2-diketones incorporated in dibenzo-fused seven-membered heterocycles in good to excellent yields, under ambient conditions. The presented carbene-catalyzed transformation appears to proceed through the benzoin intermediate followed by aerobic oxidation.
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Affiliation(s)
- Killari Satyam
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jakkula Ramarao
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Surisetti Suresh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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11
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Harish B, Yadav S, Suresh S. Design and application of intramolecular vinylogous Michael reaction for the construction of 2-alkenyl indoles. Chem Commun (Camb) 2021; 57:231-234. [PMID: 33300907 DOI: 10.1039/d0cc06564a] [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 base-mediated transformation based on a designed intramolecular vinylogous Michael addition (intra-VMA) is presented to access 3-substituted 2-alkenyl indole derivatives. The reaction represents the first example of the intra-VMA for the construction of indoles. A one-pot N-allylation of ortho-tosylamidocinnamates/congeners with γ-bromocrotonates followed by intra-VMA has been described to provide access to a diverse range of 2-alkenyl indole derivatives in reasonable to high yields. The synthetic value of the developed intra-VMA has been demonstrated by gram-scale synthesis of a representative indole derivative and also by the formal synthesis of MK-7246: a Merck's clinical CRTH2 antagonist.
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Affiliation(s)
- Battu Harish
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
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12
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Honnanayakanavar JM, Harish B, Nanubolu JB, Suresh S. Tandem Copper-Catalyzed Regioselective N-Arylation-Aza-Michael Addition: Synthesis of Tetracyclic 5 H-Benzothiazolo[3,2- a]quinazoline Derivatives. J Org Chem 2020; 85:8780-8791. [PMID: 32603597 DOI: 10.1021/acs.joc.0c00275] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A copper-catalyzed tandem process integrating regioselective N-arylation, followed by aza-Michael addition, is disclosed using 2-aminobenzothiazoles and ortho-halo cinnamic acid congeners. This process generated diverse tetracyclic 5H-benzothiazolo[3,2-a]quinazoline derivatives in moderate to good yields. The present tandem reaction appears to proceed through concomitant ring opening of 2-aminobenzothiazole and S-arylation to give the ortho-cyanamide-substituted diaryl thioether intermediate. The thus generated intermediate likely undergoes an unprecedented Truce-Smiles-type rearrangement involving S- to N-aryl migration, followed by reformation of the thiazole ring and intramolecular aza-Michael addition to furnish the title products.
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Affiliation(s)
- Jyoti M Honnanayakanavar
- Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Battu Harish
- Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Jagadeesh Babu Nanubolu
- Laboratory of X-Ray Crystallography, Department of Analytical Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - Surisetti Suresh
- Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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13
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Duc DX. Recent Achievement in the Synthesis of Benzo[b]furans. Curr Org Synth 2020; 17:498-517. [PMID: 32586253 DOI: 10.2174/1570179417666200625212639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/21/2020] [Accepted: 05/28/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Benzo[b]furan derivatives are oxygen-containing heterocyclic compounds consisting of fused benzene and furan rings and are present in a large number of natural and non-natural compounds. This class of compounds has a wide spectrum of biological activities, such as antiarrhythmic, anticancer, inflammatory, antioxidant, antimicrobial, and antiviral. Furthermore, benzo[b]furan derivatives have also been applied in various areas, such as organic electroluminescence device materials and organic dyes, photosensitizing material, organic synthesis as building blocks or intermediates. Because of a broad range of applicability, the synthesis of benzo[b]furan derivative has drawn great attention of chemists and many studies on the synthesis of this class of compounds have been reported recently. This review will give an overview of benzo[b]furan preparation based on studies dating back to the year 2012. OBJECTIVE In this review, recent development in the synthesis of benzo[b]furans are discussed. There has been increasingly new methodologies for the construction of benzo[b]furans skeleton to improve efficiency or develop environmentally friendly procedures. In some studies, reaction mechanisms were also outlined. CONCLUSION Many methods for the synthesis of benzo[b]furans have been reported recently. Most of them involve cyclization or cycloisomerization processes. Unquestionably, more imaginative strategies for the construction of benzo[b]furan skeleton will be established in the near future. Application of known methods to natural products or drug synthesis, on industrial scale for the synthesis of economically or medicinally important benzo[ b]furans will probably be paid attention to.
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Affiliation(s)
- Dau Xuan Duc
- Department of Chemistry, Vinh University, Vinh City, Vietnam
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14
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Li D, Yang Y, Zhang M, Wang L, Xu Y, Yang D, Wang R. Activation of allylic esters in an intramolecular vinylogous kinetic resolution reaction with synergistic magnesium catalysts. Nat Commun 2020; 11:2559. [PMID: 32444612 PMCID: PMC7244749 DOI: 10.1038/s41467-020-16486-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 05/05/2020] [Indexed: 11/29/2022] Open
Abstract
Kinetic resolution (KR) of racemic starting materials is a powerful and practical alternative to prepare valuable enantiomerically enriched compounds. A magnesium-catalyzed kinetic resolution based on a designed intramolecular vinylogous Michael reaction is disclosed. Here we show a synergistic catalytic strategy based on the development of chiral ligands. Substrates containing linear allylic ester structures are designed and synthesized to construct key [6.6.5]-tricyclic chiral skeletons via this kinetic resolution process. Detailed mechanistic studies reveal a rational mechanism for the current intramolecular vinylogous KR reaction. The desired direct intramolecular asymmetric vinylogous Michael reaction of linear allylic esters is realized in high efficiency and enantioselectivity with the synergistic catalytic system. Kinetic resolution allows to obtain enantioenriched compounds from racemic mixtures. Here, the authors report a synergistic magnesium catalyst promoting kinetic resolution of an intramolecular vinylogous Michael reaction to access [6.6.5]-tricyclic chiral skeletons.
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Affiliation(s)
- Dan Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Yuling Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Minmin Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Yingfan Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China.
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China.
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15
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Song L, Su Q, Lin X, Du Z, Xu H, Ouyang MA, Yao H, Tong R. Cascade Claisen and Meinwald Rearrangement for One-Pot Divergent Synthesis of Benzofurans and 2H-Chromenes. Org Lett 2020; 22:3004-3009. [DOI: 10.1021/acs.orglett.0c00770] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Liyan Song
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Qian Su
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Xi Lin
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Zhihui Du
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Huiyou Xu
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Ming-An Ouyang
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Hongliang Yao
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Drug Synthesis and Evaluation Center, Guangdong Institute of Applied Biological Resources, Guangzhou, Guangdong 510260, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
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16
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Reddy RJ, Kumar JJ, Kumari AH, Krishna GR. Pd‐Catalyzed Annulation of β‐Iodovinyl Sulfones with 2‐Halophenols: A General Route for the Synthesis of 3‐Sulfonyl Benzofuran Derivatives. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901550] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of ScienceOsmania University Hyderabad 500 007 India
| | - Jangam Jagadesh Kumar
- Department of Chemistry, University College of ScienceOsmania University Hyderabad 500 007 India
| | - Arram Haritha Kumari
- Department of Chemistry, University College of ScienceOsmania University Hyderabad 500 007 India
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17
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Satyam K, Murugesh V, Suresh S. The base-free van Leusen reaction of cyclic imines on water: synthesis of N-fused imidazo 6,11-dihydro β-carboline derivatives. Org Biomol Chem 2019; 17:5234-5238. [PMID: 31074750 DOI: 10.1039/c9ob00660e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Construction of imidazoles has been demonstrated on water under base-free conditions. The reaction of dihydro β-carboline imines and p-toluenesulfonylmethyl isocyanides furnished the corresponding substituted N-fused imidazo 6,11-dihydro β-carboline derivatives in very good yields under ambient conditions. The use of deuterium oxide (D2O) as a solvent enabled the incorporation of deuterium isotopes in the imidazole ring.
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Affiliation(s)
- Killari Satyam
- Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
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