1
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Vijayakumar A, Manod M, Krishna RB, Mathew A, Mohan C. Diversely functionalized isoquinolines and their core-embedded heterocyclic frameworks: a privileged scaffold for medicinal chemistry. RSC Med Chem 2023; 14:2509-2534. [PMID: 38107174 PMCID: PMC10718595 DOI: 10.1039/d3md00248a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/23/2023] [Indexed: 12/19/2023] Open
Abstract
Isoquinoline-enrooted organic small-molecules represent a challenging molecular target in the organic synthesis arsenal attributed to their structural diversity and therapeutic importance. Into the bargain, isoquinolines are significant structural frameworks in modern medicinal chemistry and drug development. Consequently, synthetic organic and medicinal chemists have been intensely interested in efficient synthetic tactics for the sustainable construction of isoquinoline frameworks and their derivatives in enantiopure or racemic forms. This review accentuates an overview of the literature on the modern synthetic approaches exploited in synthesising isoquinolines and their core embedded heterocyclic skeletons from 2021 to 2022. In detail, the methodologies and inspected pharmacological studies for the array of diversely functionalized isoquinolines or their core-embedded heterocyclic/carbocyclic structures involving the introduction of substituents at C-1, C-3, and C-4 carbon and N-2 atom, bond constructions at the C1-N2 atom and C3-N2 atom, and structural scaffolding within isoquinoline compounds have been reviewed. This intensive study highlights the need for and relevance of relatively unexplored bioisosterism employing isoquinoline-based small-molecules in drug design.
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Affiliation(s)
- Archana Vijayakumar
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
| | - M Manod
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
| | - R Bharath Krishna
- Institute for Integrated Programmes and Research in Basic Sciences, Mahatma Gandhi University Kottayam 686560 India
| | - Abra Mathew
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678577 India
| | - Chithra Mohan
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
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2
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Ray D, Majee S, Yadav RN, Banik BK. Asymmetric Reactions of N-Phosphonyl/Phosphoryl Imines. Molecules 2023; 28:molecules28083524. [PMID: 37110758 PMCID: PMC10143947 DOI: 10.3390/molecules28083524] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/12/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023] Open
Abstract
The asymmetric reactions of imines continued to attract the attention of the scientific community for decades. However, the stereoselective reactions of N-phosphonyl/phosphoryl imines remained less explored as compared to other N-substituted imines. The chiral auxiliary-based asymmetric-induction strategy with N-phosphonyl imines could effectively generate enantio- and diastereomeric amine, α,β-diamine, and other products through various reactions. On the other hand, the asymmetric approach for the generation of chirality through the utilization of optically active ligands, along with metal catalysts, could be successfully implemented on N-phosphonyl/phosphoryl imines to access numerous synthetically challenging chiral amine scaffolds. The current review critically summarizes and reveals the literature precedence of more than a decade to highlight the major achievements existing to date that can display a clear picture of advancement as well drawbacks in this area.
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Affiliation(s)
- Devalina Ray
- Amity Institute of Biotechnology, Amity University, Sector 125, Noida 201313, UP, India
- Amity Institute of Click Chemistry Research and Studies, Amity University, Sector 125, Noida 201313, UP, India
| | - Suman Majee
- Amity Institute of Biotechnology, Amity University, Sector 125, Noida 201313, UP, India
- Amity Institute of Click Chemistry Research and Studies, Amity University, Sector 125, Noida 201313, UP, India
| | - Ram Naresh Yadav
- Department of Chemistry, Faculty of Engineering and Technology, Veer Bahadur Singh Purvanchal University, Jaunpur 222003, UP, India
| | - Bimal Krishna Banik
- Department of Mathematics and Natural Sciences, College of Sciences and Human Studies, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia
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3
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Sangster JJ, Ruscoe RE, Cosgrove SC, Mangas-Sánchez J, Turner NJ. One-Pot Chemoenzymatic Cascade for the Enantioselective C(1)-Allylation of Tetrahydroisoquinolines. J Am Chem Soc 2023; 145:4431-4437. [PMID: 36790859 PMCID: PMC9983016 DOI: 10.1021/jacs.2c09176] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Herein, we report a one-pot, chemoenzymatic process for the synthesis of enantioenriched C(1)-allylated tetrahydroisoquinolines. This transformation couples a monoamine oxidase (MAO-N)-catalyzed oxidation with a metal catalyzed allylboration, followed by a biocatalytic deracemization to afford allylic amine derivatives in both high yields and good to high enantiomeric excess. The cascade is operationally simple, with all components added at the start of the reaction and can be used to generate key building blocks for further elaboration.
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4
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Fan J, Wang Y, Hu X, Liu Y, Che CM. Iron porphyrin-catalysed C(sp 3)–H amination with alkyl azides for the synthesis of complex nitrogen-containing compounds. Org Chem Front 2023. [DOI: 10.1039/d2qo01972h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
With the readily prepared iron porphyrin complex as a catalyst and starting with alkyl azides, a panel of nitrogen-containing skeletons representing the families of natural alkaloids and bioactive compounds could be prepared in good yields.
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Affiliation(s)
- Jianqiang Fan
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Ye Wang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Xuefu Hu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Yungen Liu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Chi-Ming Che
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
- HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong 518057, P. R. China
- Laboratory for Synthetic Chemistry and Chemical Biology Limited, Units 1503-1511, 15/F, Building 17W, Hong Kong Science Park, New Territories, Hong Kong, China
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5
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Shi J, Chen Z, Lu Y, Xu S, Wen T, Luo Y, Zhu Z, Chen X. Nucleophilic Dearomatization Strategy to Synthesize Disubstituted 3-Isoquinolinones under Transition Metal-Free Conditions. J Org Chem 2022; 87:13508-13516. [PMID: 35475618 DOI: 10.1021/acs.joc.2c00561] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Herein, a one-pot protocol for constructing the disubstituted isoquinolinone derivatives via the three-component reactions of 3-haloisoquinolines, alkyl halides, and indoles under transition-metal-free conditions is described. The reaction realized the trifunctionalization of isoquinoline via a dearomatization strategy, which displayed high chemical selectivity, excellent functional group tolerance, and a wide range of substrates, and is environmentally friendly. The three-component coupling involves the construction of new C-N, C═O, and C-C bonds in one step.
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Affiliation(s)
- Jianyi Shi
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Zhichao Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Yantong Lu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Shengting Xu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Tingting Wen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Yuehua Luo
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Zhongzhi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
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6
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Yang L, Li J, Xu Z, Yao P, Wu Q, Zhu D, Ma Y. Asymmetric Synthesis of Fused-Ring Tetrahydroisoquinolines and Tetrahydro-β-carbolines from 2-Arylethylamines via a Chemoenzymatic Approach. Org Lett 2022; 24:6531-6536. [PMID: 36066397 DOI: 10.1021/acs.orglett.2c02466] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While chiral fused-ring tetrahydroisoquinoline (THIQ) and tetrahydro-β-carboline (THβC) scaffolds have attracted considerable interest due to their wide spectrum of biological activities, the synthesis of optically pure chiral fused-ring THIQs and THβCs remains a challenging task. Herein, a group of active imine reductases were identified to convert the imine precursors into the corresponding enantiocomplementary fused-ring THIQs and THβCs with high enantioselectivity and conversion, establishing an efficient and green chemoenzymatic approach to fused-ring alkaloids from 2-arylethylamines.
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Affiliation(s)
- Linsong Yang
- National Center of Technology Innovation for Synthetic Biology, National Engineering Research Center of Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China.,University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Jianjiong Li
- National Center of Technology Innovation for Synthetic Biology, National Engineering Research Center of Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
| | - Zefei Xu
- National Center of Technology Innovation for Synthetic Biology, National Engineering Research Center of Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
| | - Peiyuan Yao
- National Center of Technology Innovation for Synthetic Biology, National Engineering Research Center of Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China.,University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Qiaqing Wu
- National Center of Technology Innovation for Synthetic Biology, National Engineering Research Center of Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China.,University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Dunming Zhu
- National Center of Technology Innovation for Synthetic Biology, National Engineering Research Center of Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China.,University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Yanhe Ma
- National Center of Technology Innovation for Synthetic Biology, National Engineering Research Center of Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China.,University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
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7
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Shimazumi R, Tanimoto R, Kodama T, Tobisu M. Palladium-Catalyzed Unimolecular Fragment Coupling of N-Allylamides via Elimination of Isocyanate. J Am Chem Soc 2022; 144:11033-11043. [PMID: 35695391 DOI: 10.1021/jacs.2c04527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Transition metal-catalyzed unimolecular fragment coupling (UFC) is defined as processes that forge new chemical bonds through the extrusion of molecules, such as CO and CO2, and the subsequent recombination of the remaining fragments. Herein, we report on a new UFC reaction that involves the palladium-catalyzed elimination of an isocyanate fragment from an amide, with the formation of carbon-carbon and carbon-heteroatom bonds. An organometallic intermediate that is relevant to the catalytic reaction was characterized by X-ray crystallography. This UFC reaction enables the late-stage transformation of an amide functionality, allowing amides to be used as a convertible directing or protecting group.
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Affiliation(s)
- Ryoma Shimazumi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Riku Tanimoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Takuya Kodama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.,Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| | - Mamoru Tobisu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.,Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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8
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Mohan C, Krishna RB, Sivanandan ST, Ibnusaud I. Synthesis of Pyrrolo[2,1‐
a
]isoquinoline Class of Natural Product Crispine A. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Chithra Mohan
- Institute for Integrated Programmes and Research in Basic Sciences Mahatma Gandhi University Kottayam 686560 India
- School of Chemical Sciences Mahatma Gandhi University Kottayam 686560 India
| | - R. Bharath Krishna
- Institute for Integrated Programmes and Research in Basic Sciences Mahatma Gandhi University Kottayam 686560 India
| | | | - Ibrahim Ibnusaud
- Institute for Integrated Programmes and Research in Basic Sciences Mahatma Gandhi University Kottayam 686560 India
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9
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Mendes JA, Costa PRR, Yus M, Foubelo F, Buarque CD. N- tert-Butanesulfinyl imines in the asymmetric synthesis of nitrogen-containing heterocycles. Beilstein J Org Chem 2021; 17:1096-1140. [PMID: 34093879 PMCID: PMC8144919 DOI: 10.3762/bjoc.17.86] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 04/22/2021] [Indexed: 02/05/2023] Open
Abstract
The synthesis of nitrogen-containing heterocycles, including natural alkaloids and other compounds presenting different types of biological activities have proved to be successful employing chiral sulfinyl imines derived from tert-butanesulfinamide. These imines are versatile chiral auxiliaries and have been extensively used as eletrophiles in a wide range of reactions. The electron-withdrawing sulfinyl group facilitates the nucleophilic addition of organometallic compounds to the iminic carbon with high diastereoisomeric excess and the free amines obtained after an easy removal of the tert-butanesulfinyl group can be transformed into enantioenriched nitrogen-containing heterocycles. The goal of this review is to the highlight enantioselective syntheses of heterocycles involving the use of chiral N-tert-butanesulfinyl imines as reaction intermediates, including the synthesis of several natural products. The synthesis of nitrogen-containing heterocycles in which the nitrogen atom is not provided by the chiral imine will not be considered in this review. The sections are organized according to the size of the heterocycles. The present work will comprehensively cover the most pertinent contributions to this research area from 2012 to 2020. We regret in advance that some contributions are excluded in order to maintain a concise format.
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Affiliation(s)
- Joseane A Mendes
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro Puc-Rio, CEP 22435-900, Brazil
| | - Paulo R R Costa
- Laboratory of Bioorganic Chemistry, Institute of Research of Natural Products, Health Science Center, Federal University of Rio de Janeiro UFRJ, CEP 21941-590, Brazil
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo.99, 03080 Alicante, Spain
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99,03080 Alicante, Spain
- Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Francisco Foubelo
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo.99, 03080 Alicante, Spain
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99,03080 Alicante, Spain
- Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Camilla D Buarque
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro Puc-Rio, CEP 22435-900, Brazil
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10
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Foubelo F, Yus M. Chiral N-tert-Butylsulfinyl Imines: New Discoveries. CHEM REC 2020; 21:1300-1341. [PMID: 33241905 DOI: 10.1002/tcr.202000122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/27/2020] [Indexed: 12/21/2022]
Abstract
In this account the reactions of chiral N-tert-butylsulfinyl imines with organometallic reagents such as organoalkaline (lithium, sodium, potassium and cesium derivatives), organomagnesium, organozinc, organoboron, organoaluminium, organoindium and organosilicon compounds is comprehensively described. The reactivity in all cases is derived to synthetic applications in order to prepare interesting organic nitrogenated molecules, especially in the field of alkaloid compounds.
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Affiliation(s)
- Francisco Foubelo
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080, Alicante, Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo. 99, 03080, Alicante, Spain
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo. 99, 03080, Alicante, Spain
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11
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Philip RM, Radhika S, Saranya PV, Anilkumar G. Applications of tert-butanesulfinamide in the synthesis of N-heterocycles via sulfinimines. RSC Adv 2020; 10:42441-42456. [PMID: 35516764 PMCID: PMC9058287 DOI: 10.1039/d0ra08819f] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 11/16/2020] [Indexed: 01/26/2023] Open
Abstract
Chiral sulfinamides are among the best known chiral auxiliaries in the stereoselective synthesis of amines and their derivatives. The most extensively used enantiopure tert-butanesulfinamide emerged as the gold standard among many others over the last two decades. The present review attempts to provide an overview of tert-butanesulfinamide mediated asymmetric N-heterocycle synthesis via sulfinimines and covers literature from 2010-2020. This methodology offers general access to structurally diverse piperidines, pyrrolidines, azetidines, and their fused derivatives that represent the structural motif of many natural products and therapeutically applicable compounds.
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Affiliation(s)
- Rose Mary Philip
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India +91-481-2731036
| | - Sankaran Radhika
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India +91-481-2731036
| | - P V Saranya
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India +91-481-2731036
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India +91-481-2731036
- Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India
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12
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Zhang Y, Han F, Jia L, Hu X. The catalyst-free decarboxylative dearomatization of isoquinolines with β-keto acids and sulfonyl chlorides in water: access to dihydroisoquinoline derivatives. Org Biomol Chem 2020; 18:8646-8652. [PMID: 33073821 DOI: 10.1039/d0ob01799j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient and concise catalyst-free one-pot synthetic protocol for obtaining dihydroisoquinoline derivatives has been developed via the three-component condensation of isoquinolines with β-keto acids and sulfonyl chlorides. This transformation involving decarboxylative dearomatization worked well under mild and water-mediated conditions. The protocol tolerates diverse functional groups, furnishing the dihydroisoquinoline products in good to excellent yields.
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Affiliation(s)
- Yutong Zhang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China.
| | - Fuzhong Han
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China. and Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals, Qiqihar 161006, China.
| | - Lina Jia
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China. and Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals, Qiqihar 161006, China.
| | - Xiangping Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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13
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Yu H, Kim H, Baek SH, Lee D. Direct and Efficient C(sp 3)-H Functionalization of N-Acyl/Sulfonyl Tetrahydroisoquinolines (THIQs) With Electron-Rich Nucleophiles via 2,3-Dichloro-5,6-Dicyano-1,4-Benzoquinone (DDQ) Oxidation. Front Chem 2020; 8:629. [PMID: 32850649 PMCID: PMC7403605 DOI: 10.3389/fchem.2020.00629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 06/17/2020] [Indexed: 11/25/2022] Open
Abstract
A highly efficient metal-free oxidative direct C(sp3)–H functionalization of N-acyl/sulfonyl 1,2,3,4-tetrahydroisoquinolines (THIQs) with a wide range of electron-rich nucleophiles was accomplished under mild conditions through oxidation with DDQ and subsequent trapping of the resulting reactive and stable N-acyl/sulfonyl iminium ions. The synthetic utility of this method was illustrated by a concise and efficient total synthesis of (±)-benzo[a]quinolizidine (10) in 3 steps from the known N-Cbz 1,2,3,4-THIQ 4b.
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Affiliation(s)
- Heesun Yu
- Research Institute of Pharmaceutical Science and Technology (RIPST), College of Pharmacy, Ajou University, Suwon, South Korea
| | - Hyoungsu Kim
- Research Institute of Pharmaceutical Science and Technology (RIPST), College of Pharmacy, Ajou University, Suwon, South Korea
| | - Seung-Hoon Baek
- Research Institute of Pharmaceutical Science and Technology (RIPST), College of Pharmacy, Ajou University, Suwon, South Korea
| | - Dongjoo Lee
- Research Institute of Pharmaceutical Science and Technology (RIPST), College of Pharmacy, Ajou University, Suwon, South Korea
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14
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Abstract
A TMSCl-catalyzed tandem reaction of dihydroisobenzofuran acetals with indoles has been developped, which could provide an efficient and straightforward access to various tetrahydroisoquinolones in moderate to excellent yields. This process involved the first addition of the indoles to acetals, followed by skeletal rearrangement.
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15
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Bartolo ND, Read JA, Valentín EM, Woerpel KA. Reactions of Allylmagnesium Reagents with Carbonyl Compounds and Compounds with C═N Double Bonds: Their Diastereoselectivities Generally Cannot Be Analyzed Using the Felkin-Anh and Chelation-Control Models. Chem Rev 2020; 120:1513-1619. [PMID: 31904936 PMCID: PMC7018623 DOI: 10.1021/acs.chemrev.9b00414] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
This review describes the additions of allylmagnesium reagents to carbonyl compounds and to imines, focusing on the differences in reactivity between allylmagnesium halides and other Grignard reagents. In many cases, allylmagnesium reagents either react with low stereoselectivity when other Grignard reagents react with high selectivity, or allylmagnesium reagents react with the opposite stereoselectivity. This review collects hundreds of examples, discusses the origins of stereoselectivities or the lack of stereoselectivity, and evaluates why selectivity may not occur and when it will likely occur.
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Affiliation(s)
- Nicole D. Bartolo
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
| | - Jacquelyne A. Read
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
- Department of Chemistry, University of Utah, 315 South 1400
East, Salt Lake City, UT 84112, USA
| | - Elizabeth M. Valentín
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
- Department of Chemistry, Susquehanna University, 514
University Avenue, Selinsgrove, PA 17870, USA
| | - K. A. Woerpel
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
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16
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Zhou W, Zhang YX, Nie XD, Si CM, Sun X, Wei BG. Approach to Chiral 1-Substituted Isoquinolone and 3-Substituted Isoindolin-1-one by Addition-Cyclization Process. J Org Chem 2018; 83:9879-9889. [PMID: 29952568 DOI: 10.1021/acs.joc.8b01282] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An approach to access 1-substituted isoquinolones has been developed through the addition-cyclization of imines with Grignard reagents in the presence of 2,2'-dipyridyl. A number of substituted aromatic magnesium reagents were amenable to this process, and the desired products were obtained with excellent yields and outstanding diastereoselectivities ( dr > 99:1). The utility of this convenient approach is demonstrated by the formal synthesis of ( S)-cryptostyline II. Moreover, N-methylmorpholine (NMM) was found to be an effective additive for the formation of 3-substituted isoindolin-1-ones using one-pot addition-cyclization-deprotection of imine with Grignard reagents.
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Affiliation(s)
- Wen Zhou
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Yan-Xue Zhang
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Xiao-Di Nie
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Chang-Mei Si
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Xun Sun
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Bang-Guo Wei
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
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17
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Reddy YV, Biradar DO, Reddy BJM, Rathod A, Himabindu M, Reddya BVS. Asymmetric Synthesis of Tetrahydroisoquinoline Alkaloids Using Ellman's Chiral Auxiliary. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701201019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Chiral t-butylsulfinamide has been successfully employed for the stereoselective synthesis of 1-benzyl tetrahydroisoquinoline alkaloids. This is the first report on the synthesis of chiral 1-benzyltetrahydroisoquinoline natural products using tert-butylsulfinamide through a haloamide cyclization.
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Affiliation(s)
- Y. Vikram Reddy
- Crop Protection Chemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, India
| | - Dhanraj O. Biradar
- Crop Protection Chemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, India
| | | | - Aravinda Rathod
- Crop Protection Chemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, India
| | - M. Himabindu
- Crop Protection Chemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, India
| | - B. V. Subba Reddya
- Crop Protection Chemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, India
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18
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Jiang Y, Schaus SE. Asymmetric Petasis Borono-Mannich Allylation Reactions Catalyzed by Chiral Biphenols. Angew Chem Int Ed Engl 2017; 56:1544-1548. [PMID: 28052567 PMCID: PMC5716625 DOI: 10.1002/anie.201611332] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 12/25/2022]
Abstract
Chiral biphenols catalyze the asymmetric Petasis borono-Mannich allylation of aldehydes and amines through the use of a bench-stable allyldioxaborolane. The reaction proceeds via a two-step, one-pot process and requires 2-8 mole % of 3,3'-Ph2 -BINOL as the optimal catalyst. Under microwave heating the reaction affords chiral homoallylic amines in excellent yields (up to 99 %) and high enantioselectivies (er up to 99:1). The catalytic reaction is a true multicomponent condensation reaction whereas both the aldehyde and the amine can possess a wide range of structural and electronic properties. Use of crotyldioxaborolane in the reaction results in stereodivergent products with anti- and syn-diastereomers both in good diastereoselectivities and enantioselectivities from the corresponding E- and Z-borolane stereoisomers.
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Affiliation(s)
- Yao Jiang
- Department of Chemistry, Center for Molecular Discovery, Boston University, 24 Cummington Mall, Boston, MA, 02215, USA
| | - Scott E Schaus
- Department of Chemistry, Center for Molecular Discovery, Boston University, 24 Cummington Mall, Boston, MA, 02215, USA
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19
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Jiang Y, Schaus SE. Asymmetric Petasis Borono-Mannich Allylation Reactions Catalyzed by Chiral Biphenols. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611332] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yao Jiang
- Department of Chemistry, Center for Molecular Discovery; Boston University; 24 Cummington Mall Boston MA 02215 USA
| | - Scott E. Schaus
- Department of Chemistry, Center for Molecular Discovery; Boston University; 24 Cummington Mall Boston MA 02215 USA
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20
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Pashev AS, Burdzhiev NT, Stanoeva ER. Synthetic Approaches toward the Benzo[a]quinolizidine System. A Review. ORG PREP PROCED INT 2016. [DOI: 10.1080/00304948.2016.1234820] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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21
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Anjibabu R, Boggu JMR, Shekhar P, Reddy BVS. Stereoselective Synthesis of Dipeptidyl Peptidase-4 (DPP-4) Inhibitor, ( R
)-Sitagliptin. ChemistrySelect 2016. [DOI: 10.1002/slct.201600605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ramisetti Anjibabu
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
- Department of Chemistry; Adikavi Nannaya University; Rajahmundry 533296 India
| | | | - Putta Shekhar
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Basi V. Subba Reddy
- Centre for Semiochemicals; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
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22
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Chrzanowska M, Grajewska A, Rozwadowska MD. Asymmetric Synthesis of Isoquinoline Alkaloids: 2004-2015. Chem Rev 2016; 116:12369-12465. [PMID: 27680197 DOI: 10.1021/acs.chemrev.6b00315] [Citation(s) in RCA: 235] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In the past decade, the asymmetric synthesis of chiral nonracemic isoquinoline alkaloids, a family of natural products showing a wide range of structural diversity and biological and pharmaceutical activity, has been based either on continuation or improvement of known traditional methods or on new, recently developed, strategies. Both diastereoselective and enantioselective catalytic methods have been applied. This review describes the stereochemically modified traditional syntheses (the Pictet-Spengler, the Bischler-Napieralski, and the Pomeranz-Fritsch-Bobbitt) along with strategies based on closing of the nitrogen-containing ring B of the isoquinoline core by the formation of bonds between C1-N2, N2-C3, C1-N2/N2-C3, and C1-N2/C4-C4a atoms. Methods involving introduction of substituents at the C1 carbon of isoquinoline core along with syntheses applying various biocatalytic techniques have also been reviewed.
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Affiliation(s)
- Maria Chrzanowska
- Faculty of Chemistry, Adam Mickiewicz University , Umultowska 89b, 61-614 Poznań, Poland
| | - Agnieszka Grajewska
- Faculty of Chemistry, Adam Mickiewicz University , Umultowska 89b, 61-614 Poznań, Poland
| | - Maria D Rozwadowska
- Faculty of Chemistry, Adam Mickiewicz University , Umultowska 89b, 61-614 Poznań, Poland
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23
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Benmekhbi L, Louafi F, Roisnel T, Hurvois JP. Synthesis of Tetrahydroisoquinoline Alkaloids and Related Compounds through the Alkylation of Anodically Prepared α-Amino Nitriles. J Org Chem 2016; 81:6721-39. [PMID: 27410716 DOI: 10.1021/acs.joc.6b01419] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
α-Amino nitrile 2a was conveniently prepared in two individual steps from chiral hexafluorophosphate salt isoquinolinium (-)-8b including anodic cyanation as an efficient means to activate the sp(3) C1-H bond of the THIQ nucleus. The lithiation of 2a was carried out in THF at -80 °C in the presence of LDA to produce a stable α-amino carbanion which was condensed on a large variety of alkyl halides. The resulting quaternary α-amino nitriles were subjected to a stereoselective reductive decyanation in ethanol in the presence of NaBH4 as the hydride donor to yield N-Boc-1-alkyl-THIQs (+)-10a-g in up to 97:3 er's after removal of the chiral auxiliary group. Examination of the ORTEP view of THIQ (+)-1f revealed that the newly created stereogenic center had an absolute S configuration. Likewise, (-)-xylopinine was synthesized in four workup steps in an overall 63% yield from α-amino nitrile (+)-2b. In this process, crystallization of an enantioenriched mixture (90:10) of (-)-norlaudanosine with 1 equiv of (-)-N-acetyl-l-leucine afforded the leucinate salt (+)-13 (99:1 dr). Similarly, (+)-salsolidine was displaced from its (-)-DBTA salt (-)-12 in 99:1 er, which was determined by proton and carbon NMR spectroscopy in the presence of thiophosphinic acid (+)-14 as the chiral solvating agent.
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Affiliation(s)
- Lotfi Benmekhbi
- Laboratoire de Chimie des Matériaux, Faculté des Sciences Exactes, Université de Constantine 1 , route de Ain El Bey, 25000 Constantine, Algérie
| | - Fadila Louafi
- Unité de Recherche CHEMS, Faculté des Sciences Exactes, Université de Constantine 1 , route de Ain El Bey, 25000 Constantine, Algérie
| | - Thierry Roisnel
- Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, CNRS-Université de Rennes 1 , Bat. 10 B, Campus de Beaulieu, Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Jean-Pierre Hurvois
- Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1 , 2 Avenue Léon Bernard, 35043, Rennes Cedex, France
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24
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Zhang M, Sun W, Zhu G, Bao G, Zhang B, Hong L, Li M, Wang R. Enantioselective Dearomative Arylation of Isoquinolines. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01693] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ming Zhang
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000, China
| | - Wangsheng Sun
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000, China
| | - Gongming Zhu
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000, China
| | - Guangjun Bao
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000, China
| | - Bangzhi Zhang
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000, China
| | - Liang Hong
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Min Li
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Rui Wang
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000, China
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25
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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26
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Talk RA, Duperray A, Li X, Coldham I. Synthesis of substituted tetrahydroisoquinolines by lithiation then electrophilic quench. Org Biomol Chem 2016; 14:4908-17. [PMID: 27169500 DOI: 10.1039/c6ob00577b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lithiation then electrophilic quench of tetrahydroisoquinolines provides access to 1-substituted products. Removal of the N-Boc group allows rapid access to natural products such as (±)-crispine A.
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Affiliation(s)
- Ruaa A. Talk
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | | | - Xiabing Li
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | - Iain Coldham
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
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27
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Selvakumar J, Rao RS, Srinivasapriyan V, Marutheeswaran S, Ramanathan CR. Synthesis of Condensed Tetrahydroisoquinoline Class of Alkaloids by Employing TfOH-Mediated Imide Carbonyl Activation. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403617] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Guerola M, Sánchez-Roselló M, Mulet C, del Pozo C, Fustero S. Asymmetric intramolecular aza-Michael reaction in desymmetrization processes. Total synthesis of hippodamine and epi-hippodamine. Org Lett 2015; 17:960-3. [PMID: 25664487 DOI: 10.1021/acs.orglett.5b00054] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The use of chiral sulfinyl amines both as nucleophilic nitrogen sources and chiral inducers has been described for the first time in a desymmetrization-type process involving an intramolecular aza-Michael reaction. The resulting product was employed as an advanced intermediate in the total synthesis of the natural product hippodamine and epi-hippodamine, taking advantage of the special symmetry of these molecules. In addition, this is the first asymmetric total synthesis of epi-hippodamine.
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Affiliation(s)
- Marta Guerola
- Departamento de Química Orgánica, Universidad de Valencia , 46100 Burjassot, Spain
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29
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Dhanasekaran S, Bisai V, Unhale RA, Suneja A, Singh VK. A General Catalytic Route to Isoindolinones and Tetrahydroisoquinolines: Application in the Synthesis of (±)-Crispine A. Org Lett 2014; 16:6068-71. [DOI: 10.1021/ol502842f] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Vishnumaya Bisai
- Department
of Chemistry, Indian Institute of Science Education and Research Bhopal-462 066, MP, India
| | - Rajshekhar A. Unhale
- Department
of Chemistry, Indian Institute of Science Education and Research Bhopal-462 066, MP, India
| | - Arun Suneja
- Department
of Chemistry, Indian Institute of Science Education and Research Bhopal-462 066, MP, India
| | - Vinod K. Singh
- Department
of Chemistry, Indian Institute of Technology Kanpur-208 016, UP, India
- Department
of Chemistry, Indian Institute of Science Education and Research Bhopal-462 066, MP, India
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30
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Mons E, Wanner MJ, Ingemann S, van Maarseveen JH, Hiemstra H. Organocatalytic Enantioselective Pictet–Spengler Reactions for the Syntheses of 1-Substituted 1,2,3,4-Tetrahydroisoquinolines. J Org Chem 2014; 79:7380-90. [DOI: 10.1021/jo501099h] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Elma Mons
- Van’t
Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Martin J. Wanner
- Van’t
Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Steen Ingemann
- Van’t
Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jan H. van Maarseveen
- Van’t
Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Henk Hiemstra
- Van’t
Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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31
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Mengozzi L, Gualandi A, Cozzi PG. A highly enantioselective acyl-Mannich reaction of isoquinolines with aldehydes promoted by proline derivatives: an approach to 13-alkyl-tetrahydroprotoberberine alkaloids. Chem Sci 2014. [DOI: 10.1039/c4sc01221f] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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32
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33
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Hwang S, Park H, Kwon Y, Kim S. Acid promoted cyclodehydration of amino alcohols with amide acetal. RSC Adv 2014. [DOI: 10.1039/c4ra10625c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Intramolecular N-alkylation of amino alcohols using an amide acetal was developed that is widely applicable to the formation of azaheterocycles.
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Affiliation(s)
- Soonho Hwang
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
| | - Heemin Park
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
| | - Yongseok Kwon
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
| | - Sanghee Kim
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
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