1
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Zhou J, Huang X, Yu X, Yang L, Han JY, Lhazom T, Cui HL. HCl/DMSO/HFIP-Mediated Chlorination of Pyrrolo[2,1- a]isoquinolines and Other Electron-Rich Heteroarenes. J Org Chem 2024; 89:9789-9799. [PMID: 38920085 DOI: 10.1021/acs.joc.4c00151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
An efficient oxidative chlorination of pyrrolo[2,1-a]isoquinolines has been established using HCl (aq) as the chlorine source and DMSO as the terminal oxidant in HFIP at ambient temperature. A variety of chlorinated pyrrolo[2,1-a]isoquinoline derivatives have been prepared readily in 23 to 99% yields. This chlorination strategy can be expanded to the functionalization of other electron-rich heteroarenes including substituted pyrroles, indoles, and naphthols.
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Affiliation(s)
- Jing Zhou
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Xiang Huang
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, P. R. China
| | - Xin Yu
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Liu Yang
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Jia-Yi Han
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Tsesong Lhazom
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
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2
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Huang X, Zhou J, Pei SC, Cui HL. TBHP/Et 3N-Promoted Chemoselective Formylation and Peroxidation of Pyrrolo[2,1- a]isoquinolines. J Org Chem 2024; 89:6353-6363. [PMID: 38625867 DOI: 10.1021/acs.joc.4c00321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
An efficient formylation of pyrrolo[2,1-a]isoquinoline derivatives has been reached by the use of TBHP (tBuOOH) and Et3N as the mediator. In this strategy, CHO and CDO can be readily incorporated into heteroarenes by the utilization of CHCl3 and CDCl3 as the carbonyl sources. Interestingly, a solvent-controlled chemoselectivity was observed. The use of PhCl as a solvent resulted in dearomatization and peroxidation of pyrrolo[2,1-a]isoquinolines, delivering functionalized peroxides in 53-64% yields.
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Affiliation(s)
- Xiang Huang
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, P. R. China
| | - Jing Zhou
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Shu-Chen Pei
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, P. R. China
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
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3
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Wen Y, Jin HX, Qiu YH, Zong Y, Luo W, Chen Z, Yu D. Photo-induced tungsten-catalyzed cascade synthesis of pyrrolo[2,1- a]isoquinoline-1,3-dicarboxylate and its reaction mechanism. Chem Commun (Camb) 2024; 60:4573-4576. [PMID: 38572995 DOI: 10.1039/d4cc00169a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
A pyrrolo[2,1-a]isoquinoline core structure is prevalent in marine and other natural products. This article describes a tungsten-catalyzed [3+2] cycloaddition aromatization of dihydroisoquinoline ester and maleic anhydride or an acrylate. The photochemical reaction tolerates a range of functional groups such as ester, cyano, ketone, bromide, and alkene. It is shown that the cycloaddition-aromatization of 2-substitued acrylate catalyzed by a tungsten photocatalyst can be used to evaluate the leaving ability of the leaving group. Experiments done to determine the reaction mechanism revealed that the formation of an ion-pair intermediate generated in situ from dihydroisoquinoline ester and (Z)-4-methoxy-4-oxobut-2-enoic acid via the solvolysis of maleic anhydride with methanol is crucial for the cascade process to occur. The key cycloadduct acid intermediate derived from [3+2] cycloaddition was isolated and determined by X-ray crystallography.
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Affiliation(s)
- Yongshun Wen
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Hong-Xian Jin
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Yan-Hua Qiu
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Yingtong Zong
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Wenjun Luo
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Zhengwang Chen
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Daohong Yu
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
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4
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Chen XH, Lhazom T, Cui HL. NH 4OAc/DMSO-Promoted Benzylation of Pyrrolo[2,1- a]isoquinolines. J Org Chem 2023; 88:13598-13609. [PMID: 37728513 DOI: 10.1021/acs.joc.3c01302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Benzylation of pyrrolo[2,1-a]isoquinoline derivatives has been realized with various phenols by the use of ammonium acetate as a promoter (20 examples, up to 84% yield). DMSO served as the source of methylene and solvent. The employment of iron chloride as a catalyst can also afford the desired benzylated products in moderate to good yields (11 examples, up to a 74% yield).
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Affiliation(s)
- Xiao-Hui Chen
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Tsesong Lhazom
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P. R. China
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5
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Cui HL, Chen XH. POCl 3/Sulfoxide and AcCl/Sulfoxide Mediated Chlorination of Pyrrolo[2,1- a]isoquinolines. J Org Chem 2023; 88:11935-11944. [PMID: 37550603 DOI: 10.1021/acs.joc.3c01200] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
We have developed an efficient chlorination of pyrrolo[2,1-a]isoquinoline derivatives using POCl3 as the chlorine source and tetramethylene sulfoxide as a promoter. A series of pyrrolo[2,1-a]isoquinolines, polysubstituted pyrroles, and naphthols have been readily chlorinated under mild reaction conditions (26 examples, up to >99% yield). AcCl can also act as the chlorine source competently in this chlorination reaction.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
| | - Xiao-Hui Chen
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
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6
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Hou J, Yin J, Han H, Yang Q, Li Y, Lou Y, Wu X, You Y. Regio- and Stereoselective Hydrochlorination/Cyclization of 1, n-Enynes by FeCl 3 Catalysis. Org Lett 2023. [PMID: 37285405 DOI: 10.1021/acs.orglett.3c01495] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A highly regio- and stereoselective hydrochlorination/cyclization of enynes has been reported by FeCl3 catalysis. A variety of enynes undergo this cyclization transformation with acetic chloride as the chlorine source and H2O providing protons via a cationic pathway. This protocol provides a cheap, simple, stereospecific, and effective cyclization to afford heterocyclic alkenyl chloride compounds as Z isomers with high yields (≤98%) and regioselectivity.
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Affiliation(s)
- Jicheng Hou
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Junhao Yin
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Hao Han
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Qirui Yang
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Yougui Li
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Yazhou Lou
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Xiang Wu
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
| | - Yang'en You
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, P. R. China
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7
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Chen XH, Cui HL. AcBr/DMSO Mediated Sulfenylation of Pyrrolo[2,1- a]isoquinolines. J Org Chem 2023. [PMID: 37167603 DOI: 10.1021/acs.joc.3c00566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We have developed a mild sulfenylation of pyrrolo[2,1-a]isoquinolines with acetyl bromide and dimethyl sulfoxide. A wide range of functionalized pyrrolo[2,1-a]isoquinolines could be prepared efficiently through the formation of a C-S bond with thiophenols (27 examples, 36-94% yields). The current strategy can also be utilized for functionalization of pyrrolo[1,2-a]quinolines and indole.
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Affiliation(s)
- Xiao-Hui Chen
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
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8
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Chen XH, Ma DD, Gao X, Li YM, Jiang DB, Ma C, Cui HL. Nitration of Pyrrolo[2,1- a]isoquinolines. J Org Chem 2023; 88:4649-4661. [PMID: 36947692 DOI: 10.1021/acs.joc.3c00125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
We have successfully modified a series of pyrrolo[2,1-a]isoquinolines via direct nitration under mild reaction conditions. Easily accessible nitrates including CAN, Cu(NO3)2·H2O, and Fe(NO3)3·9H2O all can serve as effective nitrating reagents for functionalizing pyrrolo[2,1-a]isoquinolines. Various nitro-bearing pyrrolo[2,1-a]isoquinolines have been efficiently prepared in acceptable to good yields.
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Affiliation(s)
- Xiao-Hui Chen
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
| | - Dan-Dan Ma
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
- College of Chemistry & Chemical Engineering, Hubei University, Wuhan 430062, Hubei, P. R. China
| | - Xin Gao
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
| | - Yun-Meng Li
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
| | - Da-Bo Jiang
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
| | - Chao Ma
- College of Chemistry & Chemical Engineering, Hubei University, Wuhan 430062, Hubei, P. R. China
| | - Hai-Lei Cui
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
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9
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Wang S, Li Y, Zhang Z, Xiang J, Zheng L. Catalyst-Free α-Allylation of Dihydroisoquinolines with Morita-Baylis-Hillman Carbonates and Its Applications in the Construction of Benzo[ a]quinolizidines. J Org Chem 2023; 88:3636-3649. [PMID: 36862664 DOI: 10.1021/acs.joc.2c02843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
In this work, a mild and efficient catalyst-free α-allylation of 3,4-dihydroisoquinoline imines with Morita-Baylis-Hillman (MBH) carbonates was reported. The scopes of 3,4-dihydroisoquinolines and MBH carbonates as well as gram-scale synthesis were investigated, and densely functionalized adducts were obtained in moderate to good yields. The synthetic utility of these versatile synthons was further demonstrated by the facile synthesis of diverse benzo[a]quinolizidine skeletons.
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Affiliation(s)
- Siyu Wang
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Yuhan Li
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Zhuoqi Zhang
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Jinbao Xiang
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Lianyou Zheng
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
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10
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Abstract
A mild bromination of pyrrolo[2,1-a]isoquinolines has been achieved using acetyl bromide and dimethyl sulfoxide. A series of brominated pyrrolo[2,1-a]isoquinolines could be obtained in moderate to excellent yields (46-99%) at room temperature. This strategy can also be expanded to the facile bromination of polysubstituted pyrroles, indoles, electron-rich phenols, aniline, and 2-naphthol.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P. R. China
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11
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Cui HL, Chen XH. Synthesis of Pyrrolo[2,1- a]isoquinolines through Cu-Catalyzed Condensation/Addition/Oxidation/Cyclization Cascade. J Org Chem 2022; 87:15435-15447. [PMID: 36315447 DOI: 10.1021/acs.joc.2c01978] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We have developed a copper-catalyzed synthesis of pyrrolo[2,1-a]isoquinolines with terminal alkynes, aldehydes, and tetrahydroisoquinolines. A variety of pyrrolo[2,1-a]isoquinolines have been prepared in 17-69% yield via a condensation/Mannich-type addition/oxidation/cyclization cascade sequence. Modifications through simple chemical transformations provided highly functionalized molecules containing a privileged framework.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P.R. China
| | - Xiao-Hui Chen
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P.R. China
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12
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Li WZ, Zhang W, Chen XH, Wang ZD, Cui HL. Modification of Pyrrolo[2,1- a]isoquinolines and Polysubstituted Pyrroles via Methylenation with Acetyl Chloride and Dimethylsulfoxide. J Org Chem 2022; 87:11491-11502. [PMID: 35951357 DOI: 10.1021/acs.joc.2c01090] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convenient synthesis of methylene-bridged pyrrolo[2,1-a]isoquinolines has been developed. Treatment of pyrroloisoquinolines with acetyl chloride and dimethylsulfoxide (DMSO) at ambient temperature afforded bispyrroloisoquinolylmethanes in 17-85% yields. This reaction system can also be expanded to the synthesis of bispyrrolylmethanes (34-94% yields). Easy chemical transformation of methylene-bridged pyrroloisoquinoline provided an unsymmetric acid and amide possessing a privileged framework.
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Affiliation(s)
- Wan-Zhen Li
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan District, Chongqing 402160, P. R. China
| | - Wei Zhang
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan District, Chongqing 402160, P. R. China
| | - Xiao-Hui Chen
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan District, Chongqing 402160, P. R. China
| | - Zhao-Dong Wang
- College of Chemistry and Environmental Engineering, Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing 402160, P. R. China
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan District, Chongqing 402160, P. R. China
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13
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Chen XH, Cui HL. Modification of Pyrrolo[2,1‐a]isoquinolines via Iron‐Catalyzed Aminomethylenation with Amines and Dimethyl Sulfoxide. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200807] [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)
- Xiao-Hui Chen
- Chongqing University of Arts and Sciences Laboratory of Asymmetric Synthesis CHINA
| | - Hai-Lei Cui
- Chongqing University of Arts and Sciences Laboratory of Asymmetric Synthesis 319 Honghe Ave, Yongchuan, Chongqing 402160 Chongqing CHINA
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14
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Chen XH, Li WZ, Zhang W, Wang ZD, Cui HL. Modification of Pyrroloisoquinolines with 2‐Bromoketones and Dimethyl Sulfoxide through Bromination. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiao-Hui Chen
- Chongqing University of Arts and Sciences Laboratory of Asymmetric Synthesis CHINA
| | - Wan-Zhen Li
- Chongqing University of Arts and Sciences Laboratory of Asymmetric Synthesis CHINA
| | - Wei Zhang
- Chongqing University of Arts and Sciences Laboratory of Asymmetric Synthesis CHINA
| | - Zhao-Dong Wang
- Chongqing University of Arts and Sciences Key Laboratory of Environmental Materials & Remediation Technologies CHINA
| | - Hai-Lei Cui
- Chongqing University of Arts and Sciences Laboratory of Asymmetric Synthesis 319 Honghe Ave, Yongchuan, Chongqing 402160 Chongqing CHINA
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15
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Abstract
Pyrrolo[2,1-a]isoquinolines occur frequently in a large number of bioactive natural products and pharmaceutically important molecules. The synthesis of pyrrolo[2,1-a]isoquinoline derivatives is an easy and useful way to produce artificial molecules with potential applications. A huge number of excellent methodologies for constructing pyrrolo[2,1-a]isoquinolines have been reported in the last decade. This review summarizes the recent advances in this research field covering from 2011 to 2021.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
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16
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Li JQ, Chen XH, Cui HL. Modification of Pyrrolo[2,1- a]isoquinolines and Pyrrolo[1,2- a]quinolines with Ammonium Acetate and Dimethyl Sulfoxide via Methylthiomethylation. J Org Chem 2022; 87:2421-2434. [PMID: 35138091 DOI: 10.1021/acs.joc.1c02322] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient methylthiomethylation of pyrroloisoquinolines and pyrroloquinolines has been reached by the use of ammonium acetate and dimethyl sulfoxide. Methylthiomethylated heterocycles can be obtained in moderate to good yields in most cases, while trace amounts to good yields of methylene-bridged products can be observed. Choice of DMSO activator and its amount have a great influence on the chemoselectivity of this process. It is worth noting that this process can also be scalable. Another feature of this process is that the product can be transformed to sulfone and sulfoxide easily.
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Affiliation(s)
- Jia-Qin Li
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P.R. China
| | - Xiao-Hui Chen
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P.R. China.,Tonichem Pharmaceutical Technology Co., Ltd, Huizhou 516008, P.R. China
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing 402160, P.R. China
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17
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Yu D, Liu Y, Che CM. Tungsten catalysed decarboxylative [3 + 2] cycloaddition aromatization: one-pot synthesis of trifluoromethyl-pyrrolo[2,1- a]isoquinolines with visible light irradiation. Org Chem Front 2022. [DOI: 10.1039/d2qo00401a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Trifluoromethyl-pyrrolo[2,1-a]isoquinolines, which are difficult to prepare via traditional methods, could be readily prepared via a tungsten-catalysed decarboxylative [3 + 2] cycloaddition aromatization process.
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Affiliation(s)
- Daohong Yu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China
| | - Yungen Liu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Chi-Ming Che
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
- HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518055, China
- Laboratory for Synthetic Chemistry and Chemical Biology Limited, Units 1503-1511, 15/F, Building 17W, Hong Kong Science and Technology Parks, New Territories, Hong Kong, China
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18
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Shang ZH, Zhang XJ, Li YM, Wu RX, Zhang HR, Qin LY, Ni X, Yan Y, Wu AX, Zhu YP. One-Pot Synthesis of Chromone-Fused Pyrrolo[2,1- a]isoquinolines and Indolizino[8,7- b]indoles: Iodine-Promoted Oxidative [2 + 2 + 1] Annulation of O-Acetylphenoxyacrylates with Tetrahydroisoquinolines and Noreleagnines. J Org Chem 2021; 86:15733-15742. [PMID: 34633821 DOI: 10.1021/acs.joc.1c01682] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An iodine-promoted one-pot cascade oxidative annulation reaction has been developed for the synthesis of chromone-fused-pyrrolo[2,1-a]isoquinolines and indolizino[8,7-b]indoles from o-acetylphenoxyacrylates, tetrahydroisoquinolines, and noreleagnines. This process underwent a logical approach to both chromone-fused-pyrrolo[2,1-a]isoquinolines and chromone-fused-indolizino[8,7-b]indoles isolamellarin derivatives. Manipulations of l-menthol and dl-α-tocopherol demonstrate the applications of this strategy.
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Affiliation(s)
- Zhi-Hao Shang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - Xiang-Jin Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - Yi-Ming Li
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - Rui-Xue Wu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - Hui-Ru Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - Lu-Ying Qin
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - Xue Ni
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - Yu Yan
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, People's Republic of China
| | - Yan-Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, People's Republic of China
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19
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Astakhov GS, Shigaev RR, Borisova TN, Ershova AA, Titov AA, Varlamov AV, Voskressensky LG, Matveeva MD. Facile synthesis of pyrrolo[2,1-a]isoquinolines by domino reaction of 1-aroyl-3,4-dihydroisoquinolines with conjugated ketones, nitroalkenes and nitriles. Mol Divers 2021; 25:2441-2446. [PMID: 33040250 DOI: 10.1007/s11030-020-10146-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 09/26/2020] [Indexed: 12/01/2022]
Abstract
A convenient protocol for the synthesis of 5,6-dihydropyrrolo[2,1-a]isoquinolines with various electron-withdrawing substituents at C-2 atom is described. This approach is based on the two-component domino reaction of 1-aroyl-3,4-dihydroisoquinolines with α,β-unsaturated ketones, nitroalkenes and acrylonitrile. Depending on the selected substrates, the reaction was performed in TFE under reflux or under microwave irradiation. Only for the two examples, a transition metal catalyst was used.
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Affiliation(s)
- Grigorii S Astakhov
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198
- Laboratory of Metal Hydrides (MHLab), A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences, Vavilov St. 28, GSP-1, B-334, Moscow, Russia, 119991
| | - Rinat R Shigaev
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198
| | - Tatiana N Borisova
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198
| | - Anastasia A Ershova
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198
| | - Alexander A Titov
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198
| | - Alexey V Varlamov
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198
| | - Leonid G Voskressensky
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198
| | - Maria D Matveeva
- Department of Organic Chemistry, Peoples' Friendship, University of Russia (RUDN University), Miklukho-Maklaya st 6, Moscow, Russia, 117198.
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20
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Cui HL, Xiao X, Chen XH, Wang XX, Li WZ. Iron-Catalyzed One-Pot Synthesis of Indole-Tethered Tetrasubstituted Pyrroles and Their Transformations to Indolizino[8,7-b]indole Derivatives. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1681-7480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractWe have developed an efficient iron-catalyzed one-pot reaction of tryptamines, ynones and nitroolefins, affording indole-tethered tetrasubstituted pyrroles in acceptable to good yields. Other aromatic and aliphatic amines can also be utilized in this process, delivering the corresponding highly functionalized tetrasubstituted pyrroles. Indolizino[8,7-b]indole derivatives could be obtained through TFA-, TfOH- or Fe(OTf)3-mediated cyclizations via dearomatization of indole. Unexpected dibrominated products, 7,9-dibromo-6,11-dihydro-5H-indolizino[8,7-b]indoles, were formed when trimethylphenylammonium tribromide (PTAP) was employed as electrophilic cyclization promoter.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences
| | - Xue Xiao
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences
- Tonichem Pharmaceutical Technology Co., Ltd
| | - Xiao-Hui Chen
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences
- Tonichem Pharmaceutical Technology Co., Ltd
| | | | - Wan-Zhen Li
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences
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21
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Li JQ, Chen XH, Wang XX, Cui HL. Bromination of phenyl ether and other aromatics with bromoisobutyrate and dimethyl sulfoxide. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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22
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Li JQ, Tan HL, Ma DD, Zhu XX, Cui HL. Formylation and Bromination of Pyrrolo[2,1- a]isoquinoline Derivatives with Bromoisobutyrate and Dimethyl Sulfoxide. J Org Chem 2021; 86:10118-10128. [PMID: 34213904 DOI: 10.1021/acs.joc.1c00844] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We have developed an efficient formylation of pyrroloisoquinolines using bromoisobutyrate and dimethyl sulfoxide as carbonyl reagent. Various formylated pyrroloisoquinolines could be prepared in good yields (up to 94%). This formylation process can be easily scaled up to gram scale with good yield. In most cases of pyrroloisoquinolines without methoxy groups, the combination of bromoisobutyrate and dimethyl sulfoxide could act as a bromination reagent, delivering brominated pyrroloisoquinolines in acceptable to good yields (up to 82%).
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Affiliation(s)
- Jia-Qin Li
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P.R. China
| | - Hui-Lin Tan
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P.R. China
| | - Dan-Dan Ma
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P.R. China
| | - Xin-Xin Zhu
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P.R. China
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, P.R. China
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23
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Cui H, Li J. Synthesis of Imidazo[2,3‐
a
]isoquinoline and Imidazo[3,2‐
a
]quinoline Derivatives with Ynones, Isoquinolines and Quinolines. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hai‐Lei Cui
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P.R. China
| | - Jia‐Qin Li
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P.R. China
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24
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Cui HL, Liu SW, Xiao X. Synthesis of Tetrahydroindolizino[8,7- b]indole Derivatives in the Presence of Fe(OTf) 3 or CF 3SO 3H through Intramolecular Dearomatization of Indole. J Org Chem 2020; 85:15382-15395. [PMID: 33124816 DOI: 10.1021/acs.joc.0c02188] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have developed a convenient synthesis of tetrahydroindolizino[8,7-b]indole derivatives via intramolecular dearomatization of indole. Highly functionalized tetrahydroindolizinoindoles can be prepared in the presence of trifluoromethanesulfonic acid in good to excellent yields (up to >99% yield) with novel designed pyrrole-tethered indoles. The same products can also be synthesized through a mild Fe(OTf)3-catalyzed process in acceptable to good yields (up to 75% yield).
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
| | - Si-Wei Liu
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China.,Tonichem Pharmaceutical Technology Company, Ltd., Huizhou 516008, P. R. China
| | - Xue Xiao
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China.,Tonichem Pharmaceutical Technology Company, Ltd., Huizhou 516008, P. R. China
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25
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Cui H, Liu S, Xiao X. Palladium Catalyzed Direct Alkenylation of Dihydropyrrolo[2,1‐
a
]isoquinolines through the Oxidative Heck Reaction. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000959] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hai‐Lei Cui
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. 402160 Chongqing, Yongchuan P.R. China
| | - Si‐Wei Liu
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. 402160 Chongqing, Yongchuan P.R. China
- Tonichem Pharmaceutical Technology Co., Ltd. 516008 Huizhou P.R. China
| | - Xue Xiao
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. 402160 Chongqing, Yongchuan P.R. China
- Tonichem Pharmaceutical Technology Co., Ltd. 516008 Huizhou P.R. China
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26
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Xie Z, Li F, Niu L, Li H, Zheng J, Han R, Ju Z, Li S, Li D. CuBr/NHPI co-catalyzed aerobic oxidative [3 + 2] cycloaddition-aromatization to access 5,6-dihydro-pyrrolo[2,1-a]isoquinolines. Org Biomol Chem 2020; 18:6889-6898. [PMID: 32852493 DOI: 10.1039/d0ob01403f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and enviromentally friendly CuBr/NHPI co-catalyzed aerobic oxidative [3 + 2] cycloaddition-aromatization cascade was realized with N-substituted tetrahydroisoquinolines and electron-deficient olefins. Under the mild conditions, the reaction proceeded smoothly and displayed excellent functional group tolerance, affording 5,6-dihydro-pyrrolo[2,1-a]isoquinolines in good to high yields. This protocol exhibits a broad substrate scope to both N-alkyl tetrahydroisoquinolines and dipolarophile substrates.
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Affiliation(s)
- Zhiyu Xie
- College of Chemical and Materials Engineering, Xuchang University, No. 88, Bayi Road, Xuchang, Henan 461000, P. R. China.
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27
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Liu S, Ma D, Zhu X, Luo C, Tan H, Ju X, Tan X, Tang X, Huang J, Wang J, Wang X, Cui H. Iron Catalyzed [3+2] Cycloaddition of Tetrahydroisoquinoline: Synthesis of Dihydropyrrolo[2,1‐
a
]isoquinolines. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000211] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Si‐Wei Liu
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
- Tonichem Pharmaceutical Technology Co., Ltd Huizhou 516008 P. R. China
| | - Dan‐Dan Ma
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Xin‐Xin Zhu
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Cheng‐Dan Luo
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Hui‐Lin Tan
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Xiao‐Li Ju
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Xue Tan
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Xiao‐Hui Tang
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Jie Huang
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Jia Wang
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
| | - Xian‐Xun Wang
- Tonichem Pharmaceutical Technology Co., Ltd Huizhou 516008 P. R. China
| | - Hai‐Lei Cui
- Laboratory of Asymmetric Synthesis Chongqing University of Arts and Sciences 319 Honghe Ave. Yongchuan, Chongqing 402160 P. R. China
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28
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Cui HL. FeCl 2 catalyzed direct modification of dihydropyrrolo[2,1-a]isoquinolines with phenols. Org Biomol Chem 2020; 18:4085-4089. [PMID: 32427273 DOI: 10.1039/d0ob00917b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A mild catalytic modification of dihydropyrrolo[2,1-a]isoquinolines with various phenols via the formation of heteroarene cation radicals as key intermediates has been developed. A range of direct cross-coupling products could be obtained in acceptable to excellent yields (up to 98%) in the presence of FeCl2.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
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29
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Cui HL. Recent progress in (hetero)arene cation radical-based heteroarene modification. Org Biomol Chem 2020; 18:2975-2990. [PMID: 32239015 DOI: 10.1039/d0ob00441c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The transformation of (hetero)arene cation radicals has become a powerful tool for the construction of highly functionalized (hetero)arenes. These (hetero)arene cation radicals could be generated under electrochemical, photochemical or chemical oxidation systems. The in situ generated (hetero)arene cation radicals can be attacked by various nucleophiles, such as (hetero)aromatics and anions, yielding structurally diverse molecules. Recently, a large number of impressive heteroarene modifications have been designed by this strategy. This review summarizes the advances in heteroarene modification via reactions of in situ formed (hetero)arene cation radicals, ranging from 2010 to 2020.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
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30
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Jiang XF, Tan H, Cui HL. FeCl 3 mediated dimerization of dihydropyrrolo[2,1-a]isoquinolines and chlorination of tetrasubstituted pyrroles. Org Biomol Chem 2020; 18:660-665. [PMID: 31894798 DOI: 10.1039/c9ob02607j] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We have developed a mild and direct dimerization of dihydropyrrolo[2,1-a]isoquinolines through FeCl3-mediated oxidative homocoupling. A series of dimeric dihydropyrroloisoquinoline derivatives were obtained in acceptable to excellent yields (up to >99%). Attempts to expand this dimerization system to the synthesis of dimeric pyrroles failed and chlorination products were obtained in most cases instead of dimeric pyrroles.
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Affiliation(s)
- Xue-Fei Jiang
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
| | - Hao Tan
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
| | - Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
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31
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Jia FC, Chen TZ, Hu XQ. TFA/TBHP-promoted oxidative cyclisation for the construction of tetracyclic quinazolinones and rutaecarpine. Org Chem Front 2020. [DOI: 10.1039/d0qo00345j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An efficient TFA/TBHP-promoted oxidative cyclisation of readily available isatins with 1,2,3,4-tetrahydroisoquinolines has been firstly developed. The potential utility of this strategy was demonstrated by one-step synthesis of a natural alkaloid Rutaecarpin.
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Affiliation(s)
- Feng-Cheng Jia
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- China
| | - Tian-Zhi Chen
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- China
| | - Xiao-Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- School of Chemistry and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
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