1
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Behera BK, Arandhara PJ, Porashar B, Bora SK, Saikia AK. Base-Promoted [4 + 2] Annulation Reaction of In Situ-Generated Azadienes from N-Propargylamines with Active Methylene Compounds: Access to Highly Functionalized 2-Pyridones. J Org Chem 2023; 88:15041-15059. [PMID: 37856150 DOI: 10.1021/acs.joc.3c01478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
A facile and efficient synthesis of structurally diversified 2-pyridones is demonstrated using the [4 + 2] annulation of in situ generated azadienes from N-propargylamines and active methylene compounds. The reaction is promoted by an inorganic base giving moderate to good yields. The developed methodology is applicable for the direct and formal synthesis of various bioactive molecules. The synthetic utility of the protocol was also illustrated by late-stage functionalization of the products.
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Affiliation(s)
- Bipin Kumar Behera
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Pallav Jyoti Arandhara
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Bikoshita Porashar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Surjya Kumar Bora
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Anil K Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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2
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Okumi T, Mori A, Okano K. Regiocontrolled halogen dance of 2,5-dibromopyrroles using equilibrium between dibromopyrrolyllithiums. Chem Commun (Camb) 2023; 59:1046-1049. [PMID: 36602204 DOI: 10.1039/d2cc06373e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A regiocontrolled halogen dance reaction of 2,5-dibromopyrroles is described. An N,N-dimethylsulfamoyl group on the pyrrole nitrogen was especially effective for facilitating interconversion of the resulting 2,3- and 2,4-dibromopyrrolyllithiums, rendering the smooth halogen dance reaction. This method was applicable to the formal synthesis of atorvastatin.
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Affiliation(s)
- Tatsuki Okumi
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
| | - Atsunori Mori
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan. .,Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Kentaro Okano
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
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3
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Nie Z, Yang T, Su M, Luo WP, Liu Q, Guo CC. One‐Step Synthesis of Arylacetaldehydes from Aryl aldehydes or Diaryl ketones via One‐Carbon Extension by Using the System of DMSO/KOH/Zinc. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200437] [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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4
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Yavari I, Ghorbanzadeh M, Akbarzadeh S. A synthesis of fuctionalized 2-amino-3-cyano pyrroles from terminal alkynes, sulfonyl azides and phenacylmalononitriles. Org Biomol Chem 2022; 20:4352-4360. [PMID: 35575246 DOI: 10.1039/d2ob00277a] [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 new strategy for the construction of functionalized 2-amino-3-cyano pyrroles has been developed. The reactions involved a copper-catalyzed azide-alkyne cycloaddtion reaction between terminal alkynes and sulfonyl azides followed by generation of N-sulfonoketenimine intermediates. Interception of these reactive ketenimines by phenacylmalononitriles in the presence of copper(I) iodide and Et3N afforded the expected products. The reaction proceeded smoothly in THF at ambient temperature to afford the target compounds in 70-92% yields and excellent regioselectivity. Evidence for the structure of a typical product is obtained from single-crystal X-ray analyses.
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Affiliation(s)
- Issa Yavari
- Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
| | - Meysam Ghorbanzadeh
- Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
| | - Somayeh Akbarzadeh
- Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
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5
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Synthesis of pyrroles from propargylamines and their derivatives: an update (microreview). Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03071-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Wu CC, Ambre R, Lee MH, Shie JJ. Flexible Construction Approach to the Synthesis of 1,5-Substituted Pyrrole-3-carbaldehydes from 5-Bromo-1,2,3-triazine. Org Lett 2022; 24:2889-2893. [PMID: 35385278 DOI: 10.1021/acs.orglett.2c00891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report an efficient and mild tandem catalytic process for the synthesis of functionalized pyrrole-3-carbaldehydes. These compounds were obtained by a one-pot three-component reaction of 5-bromo-1,2,3-triazine, terminal alkynes, and primary amines via a palladium-catalyzed Sonogashira coupling reaction, and then annulation through a silver-mediated reaction of the resulting alkynyl 1,2,3-triazines allowed for access to the multifunctionalized pyrrole-3-carbaldehydes.
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Affiliation(s)
- Chien-Chi Wu
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Ram Ambre
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Meng-Hsuan Lee
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Jiun-Jie Shie
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
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7
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Nie Z, Lv H, Yang T, Su M, Luo W, Liu Q, Guo C. Synthesis of Non‐Terminal Alkenyl Ethers, Alkenyl Sulfides, and N‐Vinylazoles from Arylaldehydes or Diarylketones, DMSO and O, S, N‐Nucleophiles. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zhiwen Nie
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Huifang Lv
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Tonglin Yang
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Miaodong Su
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Weiping Luo
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Qiang Liu
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Cancheng Guo
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
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8
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Behera BK, Sahu AK, Devi NR, Saikia AK. K 2S 2O 8-Mediated Synthesis of Highly Functionalized Pyrroles via Oxidative Self-Dimerization of N-Propargylamines. J Org Chem 2021; 86:12481-12493. [PMID: 34463507 DOI: 10.1021/acs.joc.1c00471] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient methodology has been developed for the synthesis of tetra- and pentasubstituted pyrroles via oxidative self-dimerization of N-propargylamines catalyzed by silver benzoate in the presence of K2S2O8 in good yields. The protocol provides a simple route for the synthesis of both tetra- and pentasubstituted pyrroles with two carbonyl groups in the side chain. The methodology can be extended toward the synthesis of pyrrolo[3,4-d]pyridazine.
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Affiliation(s)
- Bipin Kumar Behera
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Archana Kumari Sahu
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Ngangbam Renubala Devi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Anil K Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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9
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Liu H, Qi C, Wang L, Guo Y, Li D, Jiang H. Base-Promoted Three-Component Cascade Reaction of α-Hydroxy Ketones, Malonodinitrile, and Alcohols: Direct Access to Tetrasubstituted N H-Pyrroles. J Org Chem 2021; 86:9610-9620. [PMID: 34227382 DOI: 10.1021/acs.joc.1c00882] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A base-promoted three-component cascade reaction of α-hydroxy ketones, malonodinitrile, and alcohols has been developed, providing a direct and efficient route to a range of structurally diverse and synthetically useful 2-alkyloxy-1H-pyrrole-3-carbonitrile derivatives. The reaction involved three different bond (C-C, C-O, and C-N) formations in a single step, and its regioselectivity was depended on the structure of the α-hydroxy ketones employed. The use of easily available starting materials, wide substrate scope, good functional group tolerance, operational simplicity, and high atom economy are attractive features of the new method.
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Affiliation(s)
- Hongjian Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Chaorong Qi
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Lu Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Yanhui Guo
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Dan Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
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10
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Chen L, Huo JQ, Si HL, Xu XY, Kou S, Mao J, Zhang JL. One-Pot Synthesis of N-H-Free Pyrroles from Aldehydes and Alkynes. Org Lett 2021; 23:4348-4352. [PMID: 34014098 DOI: 10.1021/acs.orglett.1c01287] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first base-mediated intermolecular cyclization of arylaldehydes and terminal arylacetylenes for the synthesis of a wide range of pyrroles in a single step has been described. The developed methodology used commercially available starting materials and tolerated a broad range of functional groups affording 2,3,5-triaryl-substituted-1H-pyrroles with good yields (up to 92% yield) under mild conditions. The possible mechanism was also discussed.
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Affiliation(s)
- Lai Chen
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Jing-Qian Huo
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - He-Long Si
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Xin-Yu Xu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Song Kou
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Jianyou Mao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Jin-Lin Zhang
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
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11
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Claus AR, Goulart TAC, Back DF, Zeni G. Potassium
tert
‐Butoxide‐Catalyzed Synthesis of
α
‐Methylene‐
β
‐Lactams from Propiolamides. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Angelica R. Claus
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
| | - Tales A. C. Goulart
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
| | - Davi F. Back
- Laboratório de Materiais Inorgânicos CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
| | - Gilson Zeni
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
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12
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Kumar A, Mishra PK, Saini KM, Verma AK. Base‐Promoted Synthesis of Polysubstituted 4‐Aminoquinolines from Ynones and 2‐Aminobenzonitriles under Transition‐Metal‐Free Conditions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ankit Kumar
- Department of Chemistry University of Delhi Delhi 110007 India
| | - Pawan K. Mishra
- Department of Chemistry University of Delhi Delhi 110007 India
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13
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Hu S, Feng H, Xi H, Meng Y, Li M, Huang L, Huang J. Copper-catalyzed deaminative alkynylation of secondary amines with alkynes: selectivity switch in the synthesis of diverse propargylamines. Org Chem Front 2021. [DOI: 10.1039/d1qo01240a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The copper-catalyzed selective deamination and alkynylation of the unsymmetrical secondary amines with terminal alkynes was reported with a broad substrate scope and excellent functional compatibility.
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Affiliation(s)
- Shengyun Hu
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
- State Key Laboratory of New Drug and Pharmaceutical Process, Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai 201203, China
| | - Huangdi Feng
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
- Shanghai Key Laboratory of Chemical Biology, East China University of Science and Technology, Shanghai 200237, China
| | - Hui Xi
- Key Laboratory of Tobacco Flavor Basic Research of CNTC, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Yuchen Meng
- State Key Laboratory of New Drug and Pharmaceutical Process, Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai 201203, China
| | - Ming Li
- State Key Laboratory of New Drug and Pharmaceutical Process, Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai 201203, China
| | - Liliang Huang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Junhai Huang
- State Key Laboratory of New Drug and Pharmaceutical Process, Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai 201203, China
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14
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Abstract
:
Pyrrole derivatives are nitrogen-containing heterocyclic compounds and widely
distributed in a large number of natural and non-natural compounds. These compounds
possess a broad spectrum of biological activities such as anti-infammatory, antiviral, antitumor,
antifungal, and antibacterial activities. Besides their biological activity, pyrrole derivatives
have also been applied in various areas such as dyes, conducting polymers, organic
semiconductors.
:
Due to such a wide range of applicability, access to this class of compounds has attracted
intensive research interest. Various established synthetic methods such as Paal-Knorr,
Huisgen, and Hantzsch have been modified and improved. In addition, numerous novel
methods for pyrrole synthesis have been discovered. This review will focus on considerable
studies on the synthesis of pyrroles, which date back from 2014.
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Affiliation(s)
- Duc Dau Xuan
- Department of Chemistry, Natural Science Education Institute, Vinh University, Vinh City, Vietnam
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15
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Xu L, Wu L, Chen T, Xu S, Huang C, Wang Y, You Q, Shen J. Superbase‐Promoted
N
‐α‐sp
3
C‐H Functionalization of Tertiary Enaminones: Synthesis of Polysubstituted Pyrroles. ChemistrySelect 2020. [DOI: 10.1002/slct.201903792] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Limei Xu
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
| | - Longqiao Wu
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
| | - Ting Chen
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
| | - Shuang Xu
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
| | - Chuiting Huang
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
| | - Yanyun Wang
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
| | - Qihua You
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
| | - Jinhai Shen
- School of Environment and Public Health Xiamen Huaxia University Xiamen 361024 P. R. China
- Fujian Key Laboratory of Molecular Medicine Huaqiao University Xiamen 361021 P. R. China
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16
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Verma S, Kumar M, Verma AK. Aza-Henry Reaction: Synthesis of Nitronaphthylamines from 2-(Alkynyl)benzonitriles. Org Lett 2020; 22:130-134. [PMID: 31825635 DOI: 10.1021/acs.orglett.9b04045] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A transition-metal-free approach for construction of nitronaphthylamines has been developed for the first time through aza-henry, chemoselective, and regioselective annulation of 2-alkynylbenzonitriles with nitromethane. In addition, the strategy provides an elegant, operationally simple and atom-economical route for the synthesis of nitroamino substituted heterocyclic scaffolds, featuring a range of sensitive functional groups. The reaction could also devise acetonitrile and acetophenone as nucleophile. The protocol has been successfully implemented for late-stage modification of bioactive molecules.
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Affiliation(s)
- Shalini Verma
- Department of Chemistry , University of Delhi , Delhi 110007 , India
| | - Manoj Kumar
- Department of Chemistry , University of Delhi , Delhi 110007 , India
| | - Akhilesh K Verma
- Department of Chemistry , University of Delhi , Delhi 110007 , India
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17
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Mishra PK, Kumar A, Verma AK. BF3-Etherate-catalyzed tandem reaction of 2-formylarylketones with electron-rich arenes/heteroarenes: an assembly of isobenzofurans. Chem Commun (Camb) 2020; 56:6122-6125. [DOI: 10.1039/d0cc02760j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and BF3·Et2O-catalyzed chemoselective synthesis of diversified 1,3-diarylisobenzofuran in a high yield has been described.
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Affiliation(s)
| | - Ankit Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
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18
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Zhang J, Liu M, Li C, Xu YJ, Dong L. Synthesis of 2,3,4-trisubstituted pyrrole derivatives via [3 + 2] cyclization of activated methylene isocyanides with 4-(arylidene)-2-substituted oxazol-5(4 H)-ones. Org Chem Front 2020. [DOI: 10.1039/c9qo01044k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An efficient base-catalyzed [3 + 2] cyclization between isocyanides and 4-(arylidene)-2-substituted oxazol-5(4H)-ones has been successfully developed to form 2,3,4-trisubstituted and 2,2,3,4-tetrasubstituted pyrrole derivatives.
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Affiliation(s)
- Jing Zhang
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
| | - Man Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Chao Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Yan-Jun Xu
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
| | - Lin Dong
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
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19
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Sushmita, Aggarwal T, Shibata N, Verma AK. Triple‐Bond Directed Csp
2
−N Bond Formation with
N
‐Fluorobenzenesulfonimide as Aminating Source: One‐Step Transformation of Aldehydes into Amines. Chemistry 2019. [DOI: 10.1002/chem.201903495] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sushmita
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Trapti Aggarwal
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences and Department of, Life Science and Applied ChemistryNagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
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20
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Kumar V, Awasthi A, Metya A, Khan T. A Metal-Free Domino Process for Regioselective Synthesis of 1,2,4-Trisubstituted Pyrroles: Application toward the Formal Synthesis of Ningalin B. J Org Chem 2019; 84:11581-11595. [DOI: 10.1021/acs.joc.9b01520] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Virendra Kumar
- Organic Synthesis Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Argul, Khurdha 752050, Odisha, India
| | - Annapurna Awasthi
- Organic Synthesis Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Argul, Khurdha 752050, Odisha, India
| | - Abhisek Metya
- Organic Synthesis Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Argul, Khurdha 752050, Odisha, India
| | - Tabrez Khan
- Organic Synthesis Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Argul, Khurdha 752050, Odisha, India
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21
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Yamaguchi M, Fujiwara S, Manabe K. Synthesis of 2,2,5-Trisubstituted 2H-Pyrroles and 2,3,5-Trisubstituted 1H-Pyrroles by Ligand-Controlled Site-Selective Dearomative C2-Arylation and Direct C3-Arylation. Org Lett 2019; 21:6972-6977. [DOI: 10.1021/acs.orglett.9b02559] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Miyuki Yamaguchi
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Sakiko Fujiwara
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Kei Manabe
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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22
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Verma S, Kumar M, Mishra PK, Verma AK. Metal-Free Carbonyl-Assisted Regioselective Hydration of Alkynes: An Access to Dicarbonyls. Org Lett 2019; 21:5059-5063. [PMID: 31199155 DOI: 10.1021/acs.orglett.9b01649] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Metal-free regioselective hydration of o-alkynylaldehydes with the assistance of neighboring carbonyl oxygen is disclosed. The developed protocol provides a facile route to synthesize a series of multisubstituted carbonyl containing scaffolds that enable the potential application toward the synthesis of highly diversified 5-azaindoles. γ-Carbolines and 2,8-diazacarbazoles can also be accessed directly without isolating the dicarbonyl compounds. The developed methodology is operationally simple and environment-friendly, tolerates a wide variety of functional groups, and is applicable toward large scale synthesis.
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Affiliation(s)
- Shalini Verma
- Department of Chemistry , University of Delhi , Delhi 110007 , India
| | - Manoj Kumar
- Department of Chemistry , University of Delhi , Delhi 110007 , India
| | - Pawan K Mishra
- Department of Chemistry , University of Delhi , Delhi 110007 , India
| | - Akhilesh K Verma
- Department of Chemistry , University of Delhi , Delhi 110007 , India
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Casnati A, Perrone A, Mazzeo PP, Bacchi A, Mancuso R, Gabriele B, Maggi R, Maestri G, Motti E, Stirling A, Ca' ND. Synthesis of Imidazolidin-2-ones and Imidazol-2-ones via Base-Catalyzed Intramolecular Hydroamidation of Propargylic Ureas under Ambient Conditions. J Org Chem 2019; 84:3477-3490. [PMID: 30788963 DOI: 10.1021/acs.joc.9b00064] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The first organo-catalyzed synthesis of imidazolidin-2-ones and imidazol-2-ones via intramolecular hydroamidation of propargylic ureas is reported. The phosphazene base BEMP turned out to be the most active organo-catalyst compared with guanidine and amidine bases. Excellent chemo- and regioselectivities to five-membered cyclic ureas have been achieved under ambient conditions, with a wide substrate scope and exceptionally short reaction times (down to 1 min). A base-mediated isomerization step to an allenamide intermediate is the most feasible reaction pathway to give imidazol-2-ones, as suggested by DFT studies.
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Affiliation(s)
- Alessandra Casnati
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy
| | - Antonio Perrone
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy
| | - Paolo P Mazzeo
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy.,Biopharmanet-tec , Parco delle Scienze, 27/A , 43124 Parma , Italy
| | - Alessia Bacchi
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy.,Biopharmanet-tec , Parco delle Scienze, 27/A , 43124 Parma , Italy
| | - Raffaella Mancuso
- Dipartimento di Chimica e Tecnologie Chimiche , Università della Calabria , 87036 Arcavacata di Rende, Cosenza , Italy
| | - Bartolo Gabriele
- Dipartimento di Chimica e Tecnologie Chimiche , Università della Calabria , 87036 Arcavacata di Rende, Cosenza , Italy
| | - Raimondo Maggi
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy
| | - Giovanni Maestri
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy
| | - Elena Motti
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy
| | - András Stirling
- Theoretical Chemistry Research Group, Institute of Organic Chemistry , Research Centre for Natural Sciences , Budapest , Hungary
| | - Nicola Della Ca'
- Department of Chemistry, Life Sciences and Environmental Sustainability , University of Parma , 43124 Parma , Italy
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Mishra PK, Verma S, Kumar M, Kumar A, Verma AK. Harnessing the reactivity of ortho-formyl-arylketones: base-promoted regiospecific synthesis of functionalized isoquinolines. Chem Commun (Camb) 2019; 55:8278-8281. [DOI: 10.1039/c9cc03689j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and base-mediated one-pot regiospecific synthesis of structurally diversified isoquinolines and benzo[h] isoquinolines from easily accessible ortho-formyl-arylketones and aryl/(het)arylmethanamines has been described.
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Affiliation(s)
| | - Shalini Verma
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Manoj Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Ankit Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
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