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Chakraborty M, Mahesh G, Nakel OR, Chavda G, Anusha S, Sudhakar G. A Facile Approach to Access Multi‐Substituted Indenes via Nazarov Cyclisation of Aryl, Vinyl, and Alkyl/Aryl Carbinols. ChemistrySelect 2021. [DOI: 10.1002/slct.202103141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mithun Chakraborty
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 India
| | - Gaddam Mahesh
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 India
| | - Omkar R. Nakel
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 India
| | - Gautamee Chavda
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 India
| | - Susarla Anusha
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 India
| | - Gangarajula Sudhakar
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 India
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Satish N, Raju SK, Nanubolu JB, Sudhakar G. The synthesis of indeno[de]isochromene derivatives from arylvinyl epoxides and carbonyl compounds via tandem Nazarov and oxa-Pictet–Spengler cyclizations. NEW J CHEM 2021. [DOI: 10.1039/d1nj03654h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The conversion of aryl vinyl epoxides and carbonyl compounds in the presence of a catalytic amount of BF3·OEt2 to indeno[de]isochromenes via tandem Nazarov and oxa-Pictet–Spengler cyclizations is described.
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Affiliation(s)
- Nagam Satish
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, UP, India
| | - Siruvuri Krishnam Raju
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, UP, India
| | - Jagadeesh Babu Nanubolu
- Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
| | - Gangarajula Sudhakar
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, UP, India
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Mahesh SK, Nanubolu JB, Sudhakar G. Tandem Addition/Electrocyclization/Benzylation of Alkyl Aryl-1,3-dienes and Aromatic Aldehydes: Access to Highly Substituted Indenes. J Org Chem 2019; 84:7815-7828. [DOI: 10.1021/acs.joc.9b00679] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fan T, Wang A, Li JQ, Ye JL, Zheng X, Huang PQ. Versatile One-Pot Synthesis of Polysubstituted Cyclopent-2-enimines from α,β-Unsaturated Amides: Imino-Nazarov Reaction. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ting Fan
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Ao Wang
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Jia-Qi Li
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Jian-Liang Ye
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Xiao Zheng
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P. R. China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P. R. China
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Fan T, Wang A, Li JQ, Ye JL, Zheng X, Huang PQ. Versatile One-Pot Synthesis of Polysubstituted Cyclopent-2-enimines from α,β-Unsaturated Amides: Imino-Nazarov Reaction. Angew Chem Int Ed Engl 2018; 57:10352-10356. [PMID: 29924902 DOI: 10.1002/anie.201805641] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Indexed: 01/03/2023]
Abstract
The imino-Nazarov cyclization of the polysubstituted pentan-1,4-diene-3-imines was realized. To this aim, a one-pot procedure involving reductive alkenyliminylation of α,β-unsaturated secondary amides with potassium organotrifluoroborates, followed by acid-catalyzed imino-Nazarov cyclization of the polysubstituted pentan-1,4-diene-3-imine intermediates, was studied systematically. This mild, operationally simple, flexible, and high-yielding protocol efficiently affords polysubstituted pentan-1,4-diene-3-imines, cyclopentenimines, and α-amino cyclopentenones, which are useful scaffolds in organic synthesis. The substituent effect at the C2 position of the polysubstituted pentan-1,4-diene-3-imines was studied by means of density-functional theory calculations. Results suggested that the electron-donating group facilitates the imino-Nazarov cyclization process.
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Affiliation(s)
- Ting Fan
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Ao Wang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Jia-Qi Li
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Jian-Liang Ye
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Xiao Zheng
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
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Sudhakar G, Mahesh SK, Vemulapalli SPB, Nanubolu JB. Nazarov Cyclization and Tandem [4 + 2]-Cycloaddition Reactions of Donor–Acceptor Cyclopropanes. Org Lett 2017; 19:4500-4503. [DOI: 10.1021/acs.orglett.7b02061] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gangarajula Sudhakar
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - S. K. Mahesh
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - S. Phani Babu Vemulapalli
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - Jagadeesh Babu Nanubolu
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
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Sudhakar G, Raghavaiah J, Mahesh G, Singarapu KK. Nazarov cyclization of divinyl ketones bearing an ester group at the β-position: a remarkable effect of α-substitution and alkene geometry on regioselectivity. Org Biomol Chem 2016; 14:2866-72. [DOI: 10.1039/c6ob00081a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Nazarov cyclization of divinyl ketones with an ester at the β-position was examined with particular reference to where the cyclic double bond forms.
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Affiliation(s)
- Gangarajula Sudhakar
- CPC (Organic Chemistry-II) Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
- Academy of Scientific and Innovative Research
| | - Jakka Raghavaiah
- CPC (Organic Chemistry-II) Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
- Academy of Scientific and Innovative Research
| | - Gaddam Mahesh
- CPC (Organic Chemistry-II) Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
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