1
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Chennamsetti H, Rathore KS, Chatterjee S, Mandal PK, Katukojvala S. Triple Nucleophilic Head-to-Tail Cascade Polycyclization of Diazodienals via Combination Catalysis: Direct Access to Cyclopentane Fused Aza-Polycycles with Six-Contiguous Stereocenters. JACS AU 2024; 4:2099-2107. [PMID: 38938806 PMCID: PMC11200238 DOI: 10.1021/jacsau.4c00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/15/2024] [Accepted: 04/15/2024] [Indexed: 06/29/2024]
Abstract
Reported herein are the bench stable (2E,4E)-diazohexa-2,4-dienals (diazodienals) and their unprecedented polycyclization with aldimine and arylamines enabled by Rh(II)/Brønsted acid relay catalysis. This scalable and atom-economical reaction provides direct access to the biologically important azatricyclo[6.2.1.04,11]undecane fused polycycles having six-contiguous stereocenters. Mechanistic studies revealed that polycyclization proceeds through an unusual triple-nucleophilic cascade initiated by aldimine attack on remote Rh-carbenoid, 6π-electrocyclization of aza-trienyl azomethine ylide, stereoselective aza-Michael addition via iminium activation, and inverse electron-demand intramolecular aza Diels-Alder reaction. The π-π secondary interactions play a crucial role in the preorganization of reactive intermediates for the pericyclic reactions and, hence, the overall efficiency of the polycyclization.
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Affiliation(s)
| | | | | | | | - Sreenivas Katukojvala
- Department of Chemistry, Indian
Institute of Science Education & Research
Bhopal, Bhopal, Madhya Pradesh 462066, India
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2
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Yang H, Li Y, Zhang W, Song J, Hu J, Wang M, Yao H, Xu X, Li N, Yang Y, Yu R, Xie S, Ye C, Wei G. Regioselective Hydrodeoxygenation of α-Diketones with Phosphites under Visible-Light Catalysis. Org Lett 2023; 25:7422-7427. [PMID: 37781988 DOI: 10.1021/acs.orglett.3c02936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Novel regioselective hydrodeoxygenation of α-diketones with phosphites as the deoxygenation reagent was realized via visible-light photoredox catalysis. Broad substrate scope and high functional group compatibility were obtained. Unsymmetric α-diketones were selectively reduced at the carbonyls of higher electrophilicity. This unique regioselectivity compared with available methods makes it a practical complementary approach for the monohydrodeoxygenation of α-diketones.
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Affiliation(s)
- Hui Yang
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Yan Li
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Wenhui Zhang
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Jiayan Song
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Jingyu Hu
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Mengya Wang
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Han Yao
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Xia Xu
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Na Li
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Yanbo Yang
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Rongrong Yu
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Shuxia Xie
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Cuiying Ye
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
| | - Guo Wei
- Key Laboratory of Natural Medicine and Immune Engineering, School of Pharmacy, Henan University, Kaifeng 475004, People's Republic of China
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3
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Gong J, Liu L, Li C, He Y, Yu J, Zhang Y, Feng L, Jiang G, Wang J, Tang BZ. Oxidization enhances type I ROS generation of AIE-active zwitterionic photosensitizers for photodynamic killing of drug-resistant bacteria. Chem Sci 2023; 14:4863-4871. [PMID: 37181775 PMCID: PMC10171080 DOI: 10.1039/d3sc00980g] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 04/05/2023] [Indexed: 05/16/2023] Open
Abstract
Type I photosensitizers (PSs) with an aggregation-induced emission (AIE) feature have received sustained attention for their excellent theranostic performance in the treatment of clinical diseases. However, the development of AIE-active type I PSs with strong reactive oxygen species (ROS) production capacity remains a challenge due to the lack of in-depth theoretical studies on the aggregate behavior of PSs and rational design strategies. Herein, we proposed a facile oxidization strategy to enhance the ROS generation efficiency of AIE-active type I PSs. Two AIE luminogens, MPD and its oxidized product MPD-O were synthesized. Compared with MPD, the zwitterionic MPD-O showed higher ROS generation efficiency. The introduction of electron-withdrawing oxygen atoms results in the formation of intermolecular hydrogen bonds in the molecular stacking of MPD-O, which endowed MPD-O with more tightly packed arrangement in the aggregate state. Theoretical calculations demonstrated that more accessible intersystem crossing (ISC) channels and larger spin-orbit coupling (SOC) constants provide further explanation for the superior ROS generation efficiency of MPD-O, which evidenced the effectiveness of enhancing the ROS production ability by the oxidization strategy. Moreover, DAPD-O, a cationic derivative of MPD-O, was further synthesized to improve the antibacterial activity of MPD-O, showing excellent photodynamic antibacterial performance against methicillin-resistant S. aureus both in vitro and in vivo. This work elucidates the mechanism of the oxidization strategy for enhancing the ROS production ability of PSs and offers a new guideline for the exploitation of AIE-active type I PSs.
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Affiliation(s)
- Jianye Gong
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Lingxiu Liu
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Chunbin Li
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Yumao He
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Jia Yu
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Ying Zhang
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Lina Feng
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Guoyu Jiang
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Jianguo Wang
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University Hohhot 010021 P. R. China
| | - Ben Zhong Tang
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong Shenzhen Guangdong 518172 China
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4
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Kumar S, Borkar V, Mujahid M, Nunewar S, Kanchupalli V. Iodonium ylides: an emerging and alternative carbene precursor for C-H functionalizations. Org Biomol Chem 2022; 21:24-38. [PMID: 36416081 DOI: 10.1039/d2ob01644c] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The metal-catalyzed successive activation and functionalization of arene/heteroarene is one of the most fundamental transformations in organic synthesis and leads to privileged scaffolds in natural products, pharmaceuticals, agrochemicals, and fine chemicals. Particularly, transition-metal-catalyzed C-H functionalization of arenes with carbene precursors via metal carbene migratory insertion has been well studied. As a result, diverse carbene precursors have been evaluated, such as diazo compounds, sulfoxonium ylides, triazoles, etc. In addition, there have been significant developments with the use of iodonium ylides as carbene precursors in recent years, and these reactions proceed with high efficiencies and selectivities. This review provides a comprehensive overview of iodonium ylides in C-H functionalizations, including the scope, limitations, and their potential synthetic applications.
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Affiliation(s)
- Sanjeev Kumar
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Vaishnavi Borkar
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Mohd Mujahid
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Saiprasad Nunewar
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Vinaykumar Kanchupalli
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
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5
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Constantin T, Górski B, Tilby MJ, Chelli S, Juliá F, Llaveria J, Gillen KJ, Zipse H, Lakhdar S, Leonori D. Halogen-atom and group transfer reactivity enabled by hydrogen tunneling. Science 2022; 377:1323-1328. [DOI: 10.1126/science.abq8663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The generation of carbon radicals by halogen-atom and group transfer reactions is generally achieved using tin and silicon reagents that maximize the interplay of enthalpic (thermodynamic) and polar (kinetic) effects. In this work, we demonstrate a distinct reactivity mode enabled by quantum mechanical tunneling that uses the cyclohexadiene derivative γ-terpinene as the abstractor under mild photochemical conditions. This protocol activates alkyl and aryl halides as well as several alcohol and thiol derivatives. Experimental and computational studies unveiled a noncanonical pathway whereby a cyclohexadienyl radical undergoes concerted aromatization and halogen-atom or group abstraction through the reactivity of an effective H atom. This activation mechanism is seemingly thermodynamically and kinetically unfavorable but is rendered feasible through quantum tunneling.
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Affiliation(s)
| | - Bartosz Górski
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
| | - Michael J. Tilby
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
| | - Saloua Chelli
- CNRS/Université Toulouse III—Paul Sabatier, Laboratoire Hétérochimie Fondamentale et Appliquée, LHFA UMR 5069, 31062 Toulouse Cedex 09, France
| | - Fabio Juliá
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
| | - Josep Llaveria
- Global Discovery Chemistry, Therapeutics Discovery, Janssen Research & Development, Janssen-Cilag S.A., 45007 Toledo, Spain
| | - Kevin J. Gillen
- LifeArc, Accelerator Building, Open Innovation Campus, Stevenage SG1 2FX, UK
| | - Hendrik Zipse
- Department Chemie, LMU München, D-81377 München, Germany
| | - Sami Lakhdar
- CNRS/Université Toulouse III—Paul Sabatier, Laboratoire Hétérochimie Fondamentale et Appliquée, LHFA UMR 5069, 31062 Toulouse Cedex 09, France
| | - Daniele Leonori
- Institute of Organic Chemistry, RWTH Aachen University, 52056 Aachen, Germany
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6
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Kanchupalli V, Thorbole LA, Kalepu J, Joseph D, Arshad M, Katukojvala S. Rhodium-Catalyzed Enal Transfer with N-Methoxypyridazinium Salts. Org Lett 2022; 24:3850-3854. [PMID: 35587254 DOI: 10.1021/acs.orglett.2c01424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Herein, we report a simple method for functionalized enals involving enal-transfer reaction of water-soluble N-methoxypyridazinium salts. This open-flask reaction proceeds under mild aqueous basic conditions through [2,3]-sigmatropic rearrangement of propargyl/allyl sulfur-ylides derived from in situ-generated Rh-(E)-enalcarbene. Various synthetically challenging allene- and allyl-functionalized (E)-enals with a γ-C(sp3) quaternary center were obtained in good to high yields. InCl3-catalyzed cascade cyclization of allenyl-enal and aniline gave a valuable pyrrolo[1,2-a]quinoline motif.
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Affiliation(s)
- Vinaykumar Kanchupalli
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Laxman Anandrao Thorbole
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Jagadeesh Kalepu
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Desna Joseph
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Mohammad Arshad
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Sreenivas Katukojvala
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
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7
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Sahu S, Banerjee A, Kundu S, Bhattacharyya A, Maji MS. Synthesis of functionalized indoles via cascade benzannulation strategies: a decade's overview. Org Biomol Chem 2022; 20:3029-3042. [PMID: 35332905 DOI: 10.1039/d2ob00187j] [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
Indoles are one of the most prominent aromatic heterocycles in the organic chemistry field. Due to their widespread presence in various natural products, alkaloids, drugs, approved medicines, etc. the synthesis and functionalization of indoles are of great interest. This review emphasizes recent developments and techniques in the domino cascade cyclization process in the last decade starting from the various building blocks. In particular, this review depicts several intriguing benzannulation methods of creating a benzene ring on a pre-existing pyrrole nucleus in an inter/intramolecular fashion under metal-catalyzed/metal-free approaches. Different subsections focus on gradual timely developments in this complementary area and a detailed analysis of the mechanisms and reactivity patterns. As a complementary method, this review gives a significant incentive to various annulation strategies and also gives an overview of the remaining challenges and upcoming possibilities.
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Affiliation(s)
- Samrat Sahu
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, India.
| | - Ankush Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, India.
| | - Samrat Kundu
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, India.
| | - Arya Bhattacharyya
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, India.
| | - Modhu Sudan Maji
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, India.
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8
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A concise and focused overview upon arylglyoxal monohydrates-based one-pot multi-component synthesis of fascinating potentially biologically active pyridazines. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131742] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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9
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Fu Y, Sun P, Li G, He R, Shi L, Xing N. Recent advances in the synthetic method and mechanism for the important N‐heterocyclic compound of 3‐methylindole. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yi Fu
- College of Chemistry and Chemical Engineering Liaoning Normal University Dalian China
| | - Pinghui Sun
- College of Chemistry and Chemical Engineering Liaoning Normal University Dalian China
| | - Gong Li
- College of Chemistry and Chemical Engineering Liaoning Normal University Dalian China
| | - Riyang He
- College of Chemistry and Chemical Engineering Liaoning Normal University Dalian China
| | - Lei Shi
- College of Chemistry and Chemical Engineering Liaoning Normal University Dalian China
| | - Na Xing
- College of Chemistry and Chemical Engineering Liaoning Normal University Dalian China
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10
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Karan G, Sahu S, Maji MS. A one-pot "back-to-front" approach for the synthesis of benzene ring substituted indoles using allylboronic acids. Chem Commun (Camb) 2021; 57:5274-5277. [PMID: 33908966 DOI: 10.1039/d1cc01512e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Synthesis of only benzene ring functionalized indoles and poly-substituted carbazoles is reported via a one-pot triple cascade benzannulation protocol. Usage of differently substituted and readily accessible allylboronic acids as a 3-carbon annulating partner enables diverse aliphatic and aromatic substitution patterns, which is still a daunting task. This scalable synthetic protocol tolerates broad scope, thus enabling further downstream modifications. As an application, carbazole based natural products glycozoline and glycozolinol were synthesized.
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Affiliation(s)
- Ganesh Karan
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India.
| | - Samrat Sahu
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India.
| | - Modhu Sudan Maji
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India.
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11
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Sun P, Lin S, Guo H, Su J, Shi L. A Highly Dispersed Copper Nanoparticles Catalyst with a Large Number of Weak Acid Centers for Efficiently Synthesizing the High Value-Added 3-Methylindole by Aniline and Biomass-Derived Glycerin. Catal Letters 2021. [DOI: 10.1007/s10562-020-03308-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Qu Y, Gao Y, Lin S, Shi L. Efficient synthesis of 3-methylindole using biomass-derived glycerol and aniline over ZnO and CeO2 modified Ag/SBA-15 catalysts. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Sergeev PG, Nenajdenko VG. Recent advances in the chemistry of pyridazine — an important representative of six-membered nitrogen heterocycles. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4922] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Wang J, Li YH, Pan SC, Li MF, Du W, Yin H, Li JH. Efficient Phosphorus-Free Chlorination of Hydroxy Aza-Arenes and Their Application in One-Pot Pharmaceutical Synthesis. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.9b00407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
- School of Pharmacy, Hangzhou Medical College, Hangzhou 310053, P. R. China
| | - Yan-Hui Li
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Song-Cheng Pan
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Ming-Fang Li
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Wenting Du
- School of Pharmacy, Hangzhou Medical College, Hangzhou 310053, P. R. China
| | - Hong Yin
- School of Pharmacy, Hangzhou Medical College, Hangzhou 310053, P. R. China
| | - Jing-Hua Li
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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15
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Yuan Y, Pan G, Zhang X, Li B, Xiang S, Huang Q. Synthesis of Seven-Membered Azepino[3,2,1-hi]indoles via Rhodium-Catalyzed Regioselective C–H Activation/1,8-Diazabicyclo[5.4.0]undec-7-ene-Catalyzed Intramolecular Amidation of 7-Phenylindoles in One Pot. J Org Chem 2019; 84:14701-14711. [DOI: 10.1021/acs.joc.9b02289] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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16
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Sahu S, Roy A, Gorai M, Guria S, Sudan Maji M. C3-Alkenylation between Pyrroles and Aldehydes Mediated by a Brønsted Acid and a Brønsted Base. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901228] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Samrat Sahu
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur West Bengal India
| | - Avijit Roy
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur West Bengal India
| | - Mahadeb Gorai
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur West Bengal India
| | - Sudip Guria
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur West Bengal India
| | - Modhu Sudan Maji
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur West Bengal India
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17
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Lad BS, Katukojvala S. Piano-Stool Rhodium Enalcarbenoids: Application to Catalyst-Controlled Metal-Templated Annulations of Diazoenals and 1,3-Dicarbonyls. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03865] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bapurao Sudam Lad
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Sreenivas Katukojvala
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
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18
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Clarke AK, Lynam JM, Taylor RJK, Unsworth WP. “Back-to-Front” Indole Synthesis Using Silver(I) Catalysis: Unexpected C-3 Pyrrole Activation Mode Supported by DFT. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00745] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Aimee K. Clarke
- University of York, Heslington, York, YO10 5DD, United Kingdom
| | - Jason M. Lynam
- University of York, Heslington, York, YO10 5DD, United Kingdom
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19
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Manna MK, Bairy G, Jana R. Sterically Controlled Ru(II)-Catalyzed Divergent Synthesis of 2-Methylindoles and Indolines through a C–H Allylation/Cyclization Cascade. J Org Chem 2018; 83:8390-8400. [PMID: 29873230 DOI: 10.1021/acs.joc.8b01034] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manash Kumar Manna
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032 West Bengal, India
- Academy of Scientific and Innovative Research (AcSIR), Kolkata, 700032 West Bengal, India
| | - Gurupada Bairy
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032 West Bengal, India
- Academy of Scientific and Innovative Research (AcSIR), Kolkata, 700032 West Bengal, India
| | - Ranjan Jana
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032 West Bengal, India
- Academy of Scientific and Innovative Research (AcSIR), Kolkata, 700032 West Bengal, India
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20
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Kanchupalli V, Katukojvala S. [1+1+3] Annulation of Diazoenals and Vinyl Azides: Direct Synthesis of Functionalized 1-Pyrrolines through Olefination. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201801976] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Vinaykumar Kanchupalli
- Department of Chemistry; Indian Institute of Science Education & Research BhopaI; Madhya Pradesh 462066 India
| | - Sreenivas Katukojvala
- Department of Chemistry; Indian Institute of Science Education & Research BhopaI; Madhya Pradesh 462066 India
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21
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Kanchupalli V, Katukojvala S. [1+1+3] Annulation of Diazoenals and Vinyl Azides: Direct Synthesis of Functionalized 1-Pyrrolines through Olefination. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801976] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Vinaykumar Kanchupalli
- Department of Chemistry; Indian Institute of Science Education & Research BhopaI; Madhya Pradesh 462066 India
| | - Sreenivas Katukojvala
- Department of Chemistry; Indian Institute of Science Education & Research BhopaI; Madhya Pradesh 462066 India
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22
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Abstract
Despite many efforts, one of the smallest heterocycles containing two nitrogen atoms, pyridazine, could not be converted to its N,N-dioxide (see, however, Nakadate et al. Chem. Pharm. Bull. 1970 , 18 , 1211 - 1218 ). HOF·CH3CN, made easily from diluted fluorine, was able to accomplish this task in a fast reaction with good yields.
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Affiliation(s)
- Shlomo Rozen
- School of Chemistry, Tel Aviv University , Tel Aviv 69978, Israel
| | - Avshalom Shaffer
- School of Chemistry, Tel Aviv University , Tel Aviv 69978, Israel
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23
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Lu S, Xu R, Li Z. Benzannulation of Pyrroles to 4,5-Disubstituted Indoles through Brønsted-Acid-Promoted Rearrangement of tert
-Butyl Peroxides. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700353] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shenglin Lu
- Department of Chemistry; Renmin University of China; Beijing 100872 China
| | - Ran Xu
- Department of Chemistry; Renmin University of China; Beijing 100872 China
| | - Zhiping Li
- Department of Chemistry; Renmin University of China; Beijing 100872 China
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24
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Thangaraj M, Gaykar RN, Roy T, Biju AT. Synthesis of Functionalized β-Keto Arylthioethers by the Aryne Induced [2,3] Stevens Rearrangement of Allylthioethers. J Org Chem 2017; 82:4470-4476. [PMID: 28349686 DOI: 10.1021/acs.joc.7b00479] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A mild and transition-metal-free synthesis of β-keto arylthioethers has been developed by the aryne triggered [2,3] Stevens rearrangement of allylthioethers. The key sulfur ylide intermediate for the rearrangement was formed by the S-arylation of allylthioethers with arynes generated from 2-(trimethylsilyl)aryl triflates using CsF. Later, the reaction products are converted into valuable heterocycles in two steps.
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Affiliation(s)
- Manikandan Thangaraj
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110020, India
| | - Rahul N Gaykar
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110020, India
| | - Tony Roy
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110020, India
| | - Akkattu T Biju
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110020, India
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25
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Synthesis of functionalized 3-arylpyridazines via Pd-catalyzed decarboxylative cross-coupling of pyridazine-3-carboxylic acids. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.083] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Dong C, Ji M, Yang X, Yao J, Chen H. Mechanisms of the transfer hydroformylation catalyzed by rhodium, cobalt, and iridium complexes: Insights from density functional theory study. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.01.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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27
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Raji Reddy C, Rani Valleti R, Sathish P. [4 + 2] Benzannulation of 3-Alkenylpyrroles/Thiophenes with Propargylic Alcohols: Access to Substituted Indoles, Benzothiophenes, and Aza[5]helicenes. J Org Chem 2017; 82:2345-2354. [DOI: 10.1021/acs.joc.6b02637] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chada Raji Reddy
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500607, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Reddi Rani Valleti
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500607, India
| | - Puppala Sathish
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500607, India
- Academy of Scientific and Innovative Research, New Delhi, India
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28
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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29
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Portillo M, Maxwell MA, Frederich JH. Synthesis of Nitrogen Heterocycles via Photochemical Ring Opening of Pyridazine N-Oxides. Org Lett 2016; 18:5142-5145. [DOI: 10.1021/acs.orglett.6b02562] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maribel Portillo
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Michael A. Maxwell
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - James H. Frederich
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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30
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Ohtaka A, Kozono M, Takahashi K, Hamasaka G, Uozumi Y, Shinagawa T, Shimomura O, Nomura R. Linear Polystyrene-stabilized Pt Nanoparticles Catalyzed Indole Synthesis in Water via Aerobic Alcohol Oxidation. CHEM LETT 2016. [DOI: 10.1246/cl.160331] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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31
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Kalepu J, Katukojvala S. Dienamine Activation of Diazoenals: Application to the Direct Synthesis of Functionalized 1,4-Oxazines. Angew Chem Int Ed Engl 2016; 55:7831-5. [DOI: 10.1002/anie.201600878] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Jagadeesh Kalepu
- Department of Chemistry; Indian Institute of Science Education & Research; Bhopal Madhya Pradesh 462066 India
| | - Sreenivas Katukojvala
- Department of Chemistry; Indian Institute of Science Education & Research; Bhopal Madhya Pradesh 462066 India
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32
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Kalepu J, Katukojvala S. Dienamine Activation of Diazoenals: Application to the Direct Synthesis of Functionalized 1,4-Oxazines. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600878] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jagadeesh Kalepu
- Department of Chemistry; Indian Institute of Science Education & Research; Bhopal Madhya Pradesh 462066 India
| | - Sreenivas Katukojvala
- Department of Chemistry; Indian Institute of Science Education & Research; Bhopal Madhya Pradesh 462066 India
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33
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Dawande SG, Lad BS, Prajapati S, Katukojvala S. Rhodium-catalyzed pyridannulation of indoles with diazoenals: a direct approach to pyrido[1,2-a]indoles. Org Biomol Chem 2016; 14:5569-73. [DOI: 10.1039/c6ob00360e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A new rhodium-catalyzed [4 + 2]-pyridannulation of 3-substituted indoles with diazoenals resulted in the biologically important pyrido[1,2-a]indoles.
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Affiliation(s)
- Sudam Ganpat Dawande
- Department of Chemistry
- Indian Institute of Science Education & Research
- Bhopal
- India
| | - Bapurao Sudam Lad
- Department of Chemistry
- Indian Institute of Science Education & Research
- Bhopal
- India
| | - Sunitkumar Prajapati
- Department of Chemistry
- Indian Institute of Science Education & Research
- Bhopal
- India
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34
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35
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Rathore KS, Lad BS, Chennamsetti H, Katukojvala S. An unprecedented benzannulation of oxindoles with enalcarbenoids: a regioselective approach to functionalized carbazoles. Chem Commun (Camb) 2016; 52:5812-5. [DOI: 10.1039/c5cc10637k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An unusual rhodium-catalyzed tandem reaction of oxindoles with diazoenals involving the cleavage of sp2 C–O and sp2 C–C bonds resulted in the formation of 1-hydroxy-2-acylcarbazoles.
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Affiliation(s)
| | - Bapurao Sudam Lad
- Department of Chemistry
- Indian Institute of Science Education & Research
- Bhopal
- India
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