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Pal P, Goud GK, Sridhar B, Mainkar PS, Nayani K, Chandrasekhar S. Metal-free dearomative 2,3-difunctionalization of indoles via radical cascade. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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Jyoti Boruah D, Kathirvelan D, Bora K, Awatar Maurya R, Yuvaraj P. Efficient and Environmentally Friendly Synthesis of 1,2,3-Triazole Derivatives via [3+2] Cycloaddition and Their Potential as Lung Cancer Inhibitors: An In Silico Study. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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3
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Jha BK, Karmakar S, Rahul Dhanaji J, Mainkar PS, Nayani K, Chandrasekhar S. Functionalization of Tyrosine Containing Short Peptides via Oxidative Dearomatization Strategy. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Anugu RR, Falck JR. Site-selective amination and/or nitrilation via metal-free C(sp 2)-C(sp 3) cleavage of benzylic and allylic alcohols. Chem Sci 2022; 13:4821-4827. [PMID: 35655896 PMCID: PMC9067586 DOI: 10.1039/d2sc00758d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 04/04/2022] [Indexed: 11/21/2022] Open
Abstract
Benzylic/allylic alcohols are converted via site-selective C(sp2)-C(sp3) cleavage to value-added nitrogenous motifs, viz., anilines and/or nitriles as well as N-heterocycles, utilizing commercial hydroxylamine-O-sulfonic acid (HOSA) and Et3N in an operationally simple, one-pot process. Notably, cyclic benzylic/allylic alcohols undergo bis-functionalization with attendant increases in architectural complexity and step-economy.
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Affiliation(s)
- Raghunath Reddy Anugu
- Chemistry Division, Biochemistry Dept., Pharmacology Dept., University of Texas Southwestern Medical Center Dallas TX 75390 USA
| | - John R Falck
- Chemistry Division, Biochemistry Dept., Pharmacology Dept., University of Texas Southwestern Medical Center Dallas TX 75390 USA
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Abstract
In this Review, we consider all the publications since the beginning of the century that describe tandem reactions resulting in the formation of five-membered aromatic nitrogen heterocycles (thiazole, imidazole, indole, tetrazole, triazole, and isoxazole). The contents of this review are organized by taxonomy and type of tandem catalysis. It covers orthogonal, auto-, and assisted tandem catalysis, providing an overview of tandem reactions applied tonitrogen heterocycles reported in the literature up to March 2020. We believe that this compilation of data will provide a necessary starting reference to developthe applications of tandem catalysis in medicinal chemistry.
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Pal P, Mainkar PS, Nayani K, Chandrasekhar S. Mn-catalyzed radical initiated domino transformation of alkynylated cyclohexadienones with TMSN 3 and O 2 to bicyclic azido alcohols. Chem Commun (Camb) 2020; 56:3453-3456. [PMID: 32101226 DOI: 10.1039/d0cc00102c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An efficient Mn-catalyzed cascade azide radical addition/cyclization/oxygen insertion reaction of alkyne-tethered cyclohexadienones with TMSN3 under mild conditions is reported. This domino reaction presents good diastereoselectivity generating bicyclic azido alcohol scaffolds which can be transformed into useful building blocks in organic synthesis for medicinal chemistry.
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Affiliation(s)
- Pranesh Pal
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Prathama S Mainkar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Kiranmai Nayani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
| | - Srivari Chandrasekhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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Al-Tel TH, Srinivasulu V, Ramanathan M, Soares NC, Sebastian A, Bolognesi ML, Abu-Yousef IA, Majdalawieh A. Stereocontrolled transformations of cyclohexadienone derivatives to access stereochemically rich and natural product-inspired architectures. Org Biomol Chem 2020; 18:8526-8571. [PMID: 33043327 DOI: 10.1039/d0ob01550d] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The last two decades or so have witnessed an upsurge in defining the art of designing complex natural products and nature-inspired molecules. Throughout these decades, fundamental insights into stereocontrolled, step-economic and atom-economical synthesis principles were achieved by the numerous synthetic accomplishments particularly in diversity-oriented synthesis (DOS). This has empowered the visualization of the third dimension in synthetic design and thus has resulted in a dramatic increase with today's diversity-oriented synthesis (DOS) at the forefront enabling access to diverse scaffolds with a high degree of stereochemical and skeletal complexity. To this end, a starting material-based approach is one of the powerful tools utilized in DOS that allows rapid access to molecular architectures with a high sp3 content. Skeletal and stereochemical diversity is often paramount for the selective modulation of the biological function of a complementary protein in the biological space. In this context, stereocontrolled transformation of cyclohexadienone scaffolds has positioned itself as a powerful platform for the rapid generation of stereochemically enriched and natural product-inspired compound collections. In this review, we cover multidirectional synthetic strategies that utilized cyclohexadienone derivatives as pluripotent building blocks en route for the construction of novel chemical space.
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Affiliation(s)
- Taleb H Al-Tel
- Sharjah Institute for Medical Research, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates.
| | - Vunnam Srinivasulu
- Sharjah Institute for Medical Research, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates.
| | - Mani Ramanathan
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates
| | - Nelson C Soares
- Sharjah Institute for Medical Research, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates.
| | - Anusha Sebastian
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates
| | - Maria L Bolognesi
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum - Università di Bologna, Via Belmeloro, 6, 40126 Bologna, Italy
| | - Imad A Abu-Yousef
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates
| | - Amin Majdalawieh
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates
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Ge J, Ding Q, Yang M, He T, Peng Y. Copper and manganese co-mediated cascade aza-Michael addition/cyclization and azidation of 1,3-enynes: regioselective synthesis of fully substituted azido pyrroles. Org Biomol Chem 2020; 18:8908-8915. [DOI: 10.1039/d0ob01927e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A Cu and Mn co-mediated aerobic oxidative cyclization and azidation reaction of 1,3-enynes with amines and trimethylsilyl azide has been developed to synthesize fully substituted azido pyrroles.
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Affiliation(s)
- Junying Ge
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Qiuping Ding
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Man Yang
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Tian He
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Yiyuan Peng
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- Jiangxi Normal University
- Nanchang 330022
- China
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