1
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Liu XQ, Chen YJ, Zou PS, Su JC, Pan CX, Mo DL, Su GF. Synthesis of Indole-Fused Pyrazino[1,2-a]quinazolinones by Copper(I)-Catalyzed Selective Hydroamination-Cyclization of Alkynyl-tethered Quinazolinones. Chemistry 2024; 30:e202402085. [PMID: 38926940 DOI: 10.1002/chem.202402085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/24/2024] [Accepted: 06/25/2024] [Indexed: 06/28/2024]
Abstract
We described a copper(I)-catalyzed atom economic and selective hydroamination-cyclization of alkynyl-tethered quinazolinones to prepare a variety of indole-fused pyrazino[1,2-a]quinazolinones in good to excellent yields ranging from 39 %-99 % under mild reaction conditions. Control experiments revealed that coordination-directed method of quinazolinone moiety with copper(I) was important for the selective hydroamination-cyclization of alkynes at the N1-atom instead of N3-atom of quinazolinone. The reaction could be easily performed at gram scales and some prepared indole-fused pyrazino[1,2-a]quinazolinones with donating groups on the indole moiety showed a distinct fluorescence emission wavelength with blue shift under the acid conditions.
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Affiliation(s)
- Xiao-Qing Liu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, 541004, Guilin, China
| | - Yan-Jie Chen
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, 541004, Guilin, China
| | - Pei-Sen Zou
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, 541004, Guilin, China
| | - Jun-Cheng Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, 541004, Guilin, China
| | - Cheng-Xue Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, 541004, Guilin, China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, 541004, Guilin, China
| | - Gui-Fa Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, 541004, Guilin, China
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2
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Singh G, Marupalli SS, Arockiaraj M, Rajeshkumar V. I 2-Cs 2CO 3 Mediated Intramolecular C2-Amination and Oxidative Rearrangement Cascade of C-3 Phenylthio Indoles: A Route to Synthesize Thiosulfonate-Embedded 2-Iminoindolin-3-ones. J Org Chem 2024; 89:5861-5870. [PMID: 38552213 DOI: 10.1021/acs.joc.4c00056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
An efficient, transition-metal-free protocol employing I2/Cs2CO3 for the synthesis of thiosulfonate containing 2-iminoindolin-3-ones motifs has been developed from C-3 phenylthio indoles. The reaction proceeded through intramolecular cyclization involving C-N bond formation, leading to the formation of indole-fused benzothiazines as a key intermediate. Remarkably, Cs2CO3 played a crucial role in the reaction as an oxygen source, enabling oxidative rearrangement with [1,4]-sulfonyl migration to furnish the final products with the formation of multiple functional groups such as C═O, C═N, and S-SO2.
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Affiliation(s)
- Gargi Singh
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
| | - Sasi Sree Marupalli
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
| | - Mariyaraj Arockiaraj
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
| | - Venkatachalam Rajeshkumar
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
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3
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Ravindar L, Hasbullah SA, Hassan NI, Qin HL. Cross‐Coupling of C‐H and N‐H Bonds: a Hydrogen Evolution Strategy for the Construction of C‐N Bonds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200596] [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]
Affiliation(s)
- Lekkala Ravindar
- Universiti Kebangsaan Malaysia Fakulti Teknologi dan Sains Maklumat Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Siti Aishah Hasbullah
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Nurul Izzaty Hassan
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Hua-Li Qin
- Wuhan University of Technology School of Chemistry 430070 Hubei CHINA
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4
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Dao PDQ, Cho CS. Copper‐Catalyzed Synthesis of 5‐Arylindolo[1.2‐c]quinazoline‐6(5H)‐ones from 2‐2(Bromoaryl)indoles and Aryl Isocyanates under Microwave Irradiation. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pham Duy Quang Dao
- Kyungpook National University Applied Chemistry 80 Daehakro, Bukgu 41566 Daegu KOREA, REPUBLIC OF
| | - Chan Sik Cho
- Kyungpook National University Department of Applied Chemistry 80 Daehakro, Bukgu 41566 Daegu KOREA, REPUBLIC OF
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5
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Gogoi K, Bora BR, Borah G, Sarma B, Gogoi S. Synthesis of quaternary carbon-centered indolo[1,2- a]quinazolinones and indazolo[1,2- a]indazolones via C-H functionalization. Chem Commun (Camb) 2021; 57:1388-1391. [PMID: 33438711 DOI: 10.1039/d0cc07419e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented Ru(ii)-catalyzed Csp2-H bond activation and annulation reaction of phenylindazolones with diaryl-substituted alkynes and dialkyl-substituted alkynes provided efficient routes for the construction of all-carbon quaternary-centered indolo[1,2-a]quinazolinones and quaternary carbon-centered indazolo[1,2-a]indazolones, respectively. The indolo[1,2-a]quinazolinones were fomed via Csp2-H activation, alkyne insertion and a 1,2-phenyl shift. Indazolo[1,2-a]indazolones were formed through a cascade reaction via the formation of exocyclic double bonds containing indolo[1,2-a]quinazolinones.
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Affiliation(s)
- Kongkona Gogoi
- Applied Organic Chemistry, Chemical Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, AcSIR, Ghaziabad-201002, India
| | - Bidisha R Bora
- Applied Organic Chemistry, Chemical Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, AcSIR, Ghaziabad-201002, India
| | - Geetika Borah
- Department of Chemistry, Dibrugarh University, Dibrugarh-786004, India
| | - Bipul Sarma
- Department of Chemical Sciences, Tezpur University, Tezpur-784028, India.
| | - Sanjib Gogoi
- Applied Organic Chemistry, Chemical Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, AcSIR, Ghaziabad-201002, India
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6
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Zhou XY, Chen X. K2CO3-Promoted Highly Selective N-Hydroxymethylation of Indoles Under Metal- and Lewis Acid-Free Conditions. LETT ORG CHEM 2021. [DOI: 10.2174/1570178617999200728214752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Inorganic base promoted highly selective N-hydroxymethylation of indole and its derivatives
have been developed. It provided a simple method for the preparation of N-hydroxymethyl
indoles with polyformaldehyde as reagents under the metal- and Lewis acid-free reaction conditions.
The reaction proceeded smoothly using K<sub>2</sub>CO<sub>3</sub> as base in 1,4-dioxane to produce the corresponding
N-hydroxymethyl indoles with 62%->99% yields.
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Affiliation(s)
- Xiao-Yu Zhou
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, 553004,China
| | - Xia Chen
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, 553004,China
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7
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Ding Y, Yan H, Chen R, Xiao X, Wang Z, Wang L, Ma Y. Expeditious Approach to Indoloquinazolinones via Double Annulations of o-Aminoacetophenones and Isocyanates. J Org Chem 2021; 86:1448-1455. [PMID: 33373228 DOI: 10.1021/acs.joc.0c02155] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel procedure for a one-pot cascade reaction of o-aminoacetophenones and aryl/aliphatic isocyanates catalyzed/oxidized by the [Pd]/[Ag] system was developed. The reaction involves two C-N bond and one C-C bond formations during the double annulation process and the desired indoloquinazolinones and derivatives were afforded up to 81% yields from readily available substrates with a tolerance of a broad variety.
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Affiliation(s)
- Yuxin Ding
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
| | - Huihui Yan
- School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
| | - Rener Chen
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Xuqiong Xiao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318 Yuhangtang Road Hangzhou 311121, P R China
| | - Zhiming Wang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Lei Wang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
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8
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Xu X, Amuti A, Wusiman A. Catalyst and Additive‐Free Direct Amidation/Halogenation of Tertiary Arylamines with
N
‐haloimide/amides. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Xiu‐Juan Xu
- School of Chemistry and Chemical Engineering Xinjiang Normal University Urumqi 830054 People's Republic of China
| | - Adila Amuti
- School of Chemistry and Chemical Engineering Xinjiang Normal University Urumqi 830054 People's Republic of China
| | - Abudureheman Wusiman
- School of Chemistry and Chemical Engineering Xinjiang Normal University Urumqi 830054 People's Republic of China
- Xinjiang Key Laboratory of Energy Storage and Photoelectrocatalytic Materials Urumqi 830054 People's Republic of China
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9
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Darehkordi A, Khorasani FN, Mohammadi M, Kazemi E. I2/KI-Catalyzed synthesis of 5-trifluoromethylated 1,2,4,6-tetrazepine-3-thiones by annulation of trifluoroacetimidoyl chlorides and thiosemicarbazones. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02703-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Tan Y, Zhao Z, Chen Z, Huang S, Jia S, Peng L, Xu D, Qin W, Yan H. N-Iodosuccinimide-Mediated Dimerization of 2-Alkynylnaphthols: A Highly Diastereoselective Construction of Bridged Polycyclic Compounds via Vinylidene ortho-Quinone Methide Intermediate. Org Lett 2020; 22:4461-4466. [DOI: 10.1021/acs.orglett.0c01458] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yu Tan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Zhengxing Zhao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Zhili Chen
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Shengli Huang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Shiqi Jia
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Lei Peng
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Da Xu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Wenling Qin
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Hailong Yan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
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11
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Recent Advances on the C2-Functionalization of Indole via Umpolung. Top Curr Chem (Cham) 2020; 378:22. [DOI: 10.1007/s41061-020-0287-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 01/28/2020] [Indexed: 01/23/2023]
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12
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Verma A, Singh Banjara L, Meena R, Kumar S. Transition‐Metal‐Free Synthesis of N‐Substituted Phenanthridinones and Spiro‐isoindolinones: C(
sp
2
)−N and C(
sp
2
)−O Coupling through Radical Pathway. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900704] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ajay Verma
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal By-pass Road Bhauri, Bhopal, Madhya Pradesh 462066 India
| | - Lal Singh Banjara
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal By-pass Road Bhauri, Bhopal, Madhya Pradesh 462066 India
| | - Rahul Meena
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal By-pass Road Bhauri, Bhopal, Madhya Pradesh 462066 India
| | - Sangit Kumar
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal By-pass Road Bhauri, Bhopal, Madhya Pradesh 462066 India
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13
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Kazi I, Sekar G. An efficient synthesis of benzothiazole using tetrabromomethane as a halogen bond donor catalyst. Org Biomol Chem 2019; 17:9743-9756. [DOI: 10.1039/c9ob02125f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A CBr4 catalyzed simple, mild, and efficient protocol has been developed for the synthesis of 2-substituted benzothiazole from 2-aminothiophenols and N-methylthioamides under solvent free conditions.
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Affiliation(s)
- Imran Kazi
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai
- India
| | - Govindasamy Sekar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai
- India
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14
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Borpatra PJ, Deka B, Deb ML, Baruah PK. Recent advances in intramolecular C–O/C–N/C–S bond formationviaC–H functionalization. Org Chem Front 2019. [DOI: 10.1039/c9qo00863b] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review presents the construction of C–X bonds (X = O/N/S) by using intramolecular C–H functionalization for the synthesis of heterocyclic compounds.
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Affiliation(s)
- Paran J. Borpatra
- Department of Applied Sciences
- GUIST
- Gauhati University
- Guwahati-781014
- India
| | - Bhaskar Deka
- Department of Applied Sciences
- GUIST
- Gauhati University
- Guwahati-781014
- India
| | - Mohit L. Deb
- Department of Applied Sciences
- GUIST
- Gauhati University
- Guwahati-781014
- India
| | - Pranjal K. Baruah
- Department of Applied Sciences
- GUIST
- Gauhati University
- Guwahati-781014
- India
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15
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Pramanik M, Choudhuri K, Mal P. N
-Iodosuccinimide as Bifunctional Reagent in (E
)-Selective C(sp2
)−H Sulfonylation of Styrenes. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800644] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Milan Pramanik
- Milan Pramanik, Khokan Choudhuri, Dr. Prasenjit Mal, School of Chemical Sciences; National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda; Odisha 752050 India
| | - Khokan Choudhuri
- Milan Pramanik, Khokan Choudhuri, Dr. Prasenjit Mal, School of Chemical Sciences; National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda; Odisha 752050 India
| | - Prasenjit Mal
- Milan Pramanik, Khokan Choudhuri, Dr. Prasenjit Mal, School of Chemical Sciences; National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda; Odisha 752050 India
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16
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Deka B, Baruah PK, Deb ML. Multi-component synthesis of 3-substituted indoles and their cyclisation to α-carbolines via I 2-promoted intramolecular C2 oxidative amination/aromatisation at room temperature. Org Biomol Chem 2018; 16:7806-7810. [PMID: 30328453 DOI: 10.1039/c8ob02362j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Condensation of indoles, aldehydes and pyrazol-5-amine in the presence of ceric ammonium nitrate gives 3-substituted indoles. These then cyclise to α-carbolines at room temperature through I2-promoted intramolecular C2 amination and aromatisation in open air. A plausible mechanism is proposed based on some controlled experiments.
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Affiliation(s)
- Bhaskar Deka
- Department of Applied Sciences, GUIST, Gauhati University, Guwahati-781014, Assam, India.
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17
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Johnson CR, Ansari MI, Coop A. Tetrabutylammonium Bromide-Promoted Metal-Free, Efficient, Rapid, and Scalable Synthesis of N-Aryl Amines. ACS OMEGA 2018; 3:10886-10890. [PMID: 30288459 PMCID: PMC6166220 DOI: 10.1021/acsomega.8b01426] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
A rapid, transition metal-free, high-yielding, tetrabutylammonium bromide-promoted method of N-arylation is reported within. The optimized conditions tolerated a wide range of secondary amines and was equally effective with bromo- and chlorobenzene-including substituted aryl halides. The developed method is found to be effective for N-arylation when compared to earlier methods which involve harsh conditions, transition metals, lack of scalability, and long reaction times. Our method utilizes conventional heating only; it is readily scalable; and the products are facile to purify.
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18
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Wu J, Zhang H, Ding X, Tan X, Chen J, He W, Deng H, Song L, Shen HC, Cao W. Potassium Iodide-Promoted One-Pot Synthesis of Fluoroalkylated Quinoxalines via a Tandem Michael Addition/Azidation/Cycloamination Approach. J Org Chem 2018; 83:9422-9429. [PMID: 30025451 DOI: 10.1021/acs.joc.8b01030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fluoroalkylated quinoxlines with various groups were efficiently synthesized via a one-pot tandem Michael addition/azidation/cycloamination process. Under the mild and metal-free conditions, a bis-imine intermediate (4a) was detected and isolated for the first time. KI played a crucial role in this reaction. The mechanism was described.
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Affiliation(s)
- Jun Wu
- School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China.,Roche Innovation Center Shanghai , Roche R&D Center (China) Ltd. , Shanghai 201203 , China
| | - Hui Zhang
- Department of Chemistry , Shanghai University , Shanghai 200444 , China
| | - Xiao Ding
- Roche Innovation Center Shanghai , Roche R&D Center (China) Ltd. , Shanghai 201203 , China
| | - Xuefei Tan
- Roche Innovation Center Shanghai , Roche R&D Center (China) Ltd. , Shanghai 201203 , China
| | - Jie Chen
- Department of Chemistry , Shanghai University , Shanghai 200444 , China
| | - Weimin He
- Department of Chemistry , Shanghai University , Shanghai 200444 , China
| | - Hongmei Deng
- Department of Chemistry , Shanghai University , Shanghai 200444 , China
| | - Liping Song
- School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China.,Department of Chemistry , Shanghai University , Shanghai 200444 , China
| | - Hong C Shen
- Roche Innovation Center Shanghai , Roche R&D Center (China) Ltd. , Shanghai 201203 , China
| | - Weiguo Cao
- Department of Chemistry , Shanghai University , Shanghai 200444 , China.,State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , Shanghai 200032 , China.,Key Laboratory of Organofluorine Chemistry , Shanghai institute of Organic Chemistry, Chinese Academy of Sciences , Shanghai 200032 , China
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19
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Alam MT, Maiti S, Mal P. An Intramolecular C(sp2
)-H Amidation Using N
-Iodosuccinimide. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800688] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Md Toufique Alam
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Homi Bhabha National Institute (HBNI); 752050 Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni Khurda District Odisha India
| | - Saikat Maiti
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Homi Bhabha National Institute (HBNI); 752050 Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni Khurda District Odisha India
| | - Prasenjit Mal
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Homi Bhabha National Institute (HBNI); 752050 Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni Khurda District Odisha India
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20
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Sundaravelu N, Chakraborty A, Sekar G. Domino Oxidative Esterification of 2-Oxo Alcohol Using 2-Iodoxybenzoic Acid/I 2
: A Route to Synthesize α
-Ketoester. ChemistrySelect 2018. [DOI: 10.1002/slct.201800941] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nallappan Sundaravelu
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036, Tamil Nadu India
| | - Ankush Chakraborty
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036, Tamil Nadu India
| | - Govindasamy Sekar
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036, Tamil Nadu India
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Abe T, Takahashi Y, Matsubara Y, Yamada K. An Ullmann N-arylation/2-amidation cascade by self-relay copper catalysis: one-pot synthesis of indolo[1,2-a]quinazolinones. Org Chem Front 2017. [DOI: 10.1039/c7qo00549k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed a self-relay copper(i)-catalyzed Ullmann N-arylation/2-amidation cascade to form functionalized indolo[1,2-a]quinazolinones in one-pot from easily available indoles with 2-bromobenzamides.
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Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Ishikari-tobetsu
- Japan
| | - Yuka Takahashi
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Ishikari-tobetsu
- Japan
| | - Yuki Matsubara
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Ishikari-tobetsu
- Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Ishikari-tobetsu
- Japan
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