1
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Sakai D, Kojima T, Kawasaki-Takasuka T, Mori K. Stereoselective synthesis of 6/7/6-fused heterocycles with multiple stereocenters via an internal redox reaction/inverse electron-demand hetero-Diels-Alder reaction sequence. Chem Commun (Camb) 2024; 60:6797-6800. [PMID: 38869043 DOI: 10.1039/d4cc02351j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
A highly stereoselective synthesis of fused heterocycles with multiple stereocenters via an internal redox reaction/inverse electron-demand hetero-Diels-Alder (IEDHDA) reaction sequence is described. The present reaction sequence has three interesting features: (1) complete control of two potentially competitive processes, i.e., hetero-Diels-Alder reaction and [1,5]-hydride shift; (2) one-shot construction of the complicated 6/7/6-fused heterocyclic structure having multiple stereocenters; and (3) high control of its stereoselectivity. When alkenylidene barbiturates with an allyl benzyl ether moiety were treated with a catalytic amount of Sc(OTf)3 and 2,2'-bipyridine, the internal redox reaction/IEDHDA reaction proceeded successively to afford 6/7/6-fused heterocycles in good chemical yields with good to excellent diastereoselectivities.
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Affiliation(s)
- Dan Sakai
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
| | - Tatsuhiro Kojima
- Department of Applied Chemistry, Kobe City College of Technology (KCCT), 8-3 Gakuen-Higashimachi, Nishi-ku, Kobe, Hyogo 651-2194, Japan
| | - Tomoko Kawasaki-Takasuka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
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2
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Wang L, Lv J, Zhang Y, Yang D. Asymmetric magnesium catalysis for important chiral scaffold synthesis. Org Biomol Chem 2024; 22:4778-4800. [PMID: 38809153 DOI: 10.1039/d4ob00521j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Magnesium catalysts are widely used in catalytic asymmetric reactions, and a series of catalytic strategies have been developed in recent years. Herein, in this review, we have tried to summarize asymmetric magnesium catalysis for the synthesis of important chiral scaffolds. Several important optically active motifs that are present in classic chiral ligands or natural products synthesized by Mg(II) catalytic methods are briefly discussed. Moreover, the representative mechanisms for different magnesium catalytic strategies, including in situ generated magnesium catalysts, are also shown in relation to synthetic routes for obtaining these important chiral scaffolds.
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Affiliation(s)
- Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou, 730000, China.
| | - Jiaming Lv
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou, 730000, China.
| | - Yongshuo Zhang
- Scientific Research and Innovation Expert Studio of China Inspection and Certification Group Liaoning Co., Ltd, Dalian, 116039, China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou, 730000, China.
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3
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Dunkel P, Bogdán D, Deme R, Zimber Á, Ballayová V, Csizmadia E, Kontra B, Kalydi E, Bényei A, Mátyus P, Mucsi Z. C(sp 3)-H cyclizations of 2-(2-vinyl)phenoxy- tert-anilines. RSC Adv 2024; 14:16784-16800. [PMID: 38784409 PMCID: PMC11112676 DOI: 10.1039/d3ra08974f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 04/29/2024] [Indexed: 05/25/2024] Open
Abstract
1,5-hydride transfer-triggered cyclization reactions offering a robust method for C(sp3)-C(sp3) coupling and the synthesis of e.g. tetrahydroquinolines have been thoroughly investigated in the literature. Catalysts allowing milder reaction conditions or the development of enantioselective processes were important recent contributions to the field, as well as the studies on subtrates with oxygen or sulfur heteroatoms (besides the originally described nitrogen heterocycles). In a series of studies, we focused on expanded, higher order H-transfers/cyclizations by positioning the interacting substituents on distanced rings. Cyclizations of appropriately functionalized biaryl and fused bicyclic systems led to 7-9 membered rings. In the frame of this research, we set out to study the feasibility of the cyclization and the factors affecting it by in silico methods. The conclusions drawn from computational studies were complemented by cyclization screens on 2-(2-vinyl)phenoxy-tert-anilines and their CH2-expanded analogues, the results of which are presented here. Besides isolating the expected oxazonine products in several cases, we also observed a unique dimer formation, leading to an interesting 5-6-5 ring system.
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Affiliation(s)
- Petra Dunkel
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Dóra Bogdán
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Ruth Deme
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Ádám Zimber
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Veronika Ballayová
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
- Department of Chemical Drugs, Masaryk University Palackého 1946/1 612 00 Brno Czech Republic
| | - Eszter Csizmadia
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Bence Kontra
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
- Department of Biological Chemistry, Brain Vision Center Liliom utca 43-45 H-1094 Budapest Hungary
| | - Eszter Kalydi
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Attila Bényei
- Institute of Physical Chemistry, University of Debrecen Egyetem tér 1 H-4010 Debrecen Hungary
| | - Péter Mátyus
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
- University of Veterinary Medicine István utca 2 H-1078 Budapest Hungary
| | - Zoltán Mucsi
- Department of Biological Chemistry, Brain Vision Center Liliom utca 43-45 H-1094 Budapest Hungary
- Department of Chemistry, Femtonics Ltd Tűzoltó utca 59 H-1094 Budapest Hungary
- Institute of Chemistry, University of Miskolc Egyetem út 1 H-3515 Miskolc Hungary
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4
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Koyama R, Anada M, Sueki S, Makino K, Kojima T, Kawasaki-Takasuka T, Mori K. Divergent synthesis of multi-substituted phenanthrenes via an internal redox reaction/ring expansion sequence. Chem Commun (Camb) 2024; 60:3822-3825. [PMID: 38497170 DOI: 10.1039/d4cc00797b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
We report an effective synthetic route to multi-substituted phenanthrenes via an internal redox reaction/ring expansion sequence. The interesting feature of the present system is that it allows for the divergent synthesis of the target skeleton depending on the selected Lewis acid catalyst. When benzylidene malonates with a cyclic structure at the ortho-position were treated with BF3·OEt2, three sequential processes (internal redox reaction/elimination of the alkoxy group/ring expansion) proceeded to give phenanthrene derivatives in which the alkoxycarbonyl (CO2R) group and the alkyl (R) group were in close proximity to each other, in good chemical yields. In sharp contrast, treatment with Bi(OTf)3 exclusively led to the formation of another type of phenanthrene, whose R group was positioned distal to the CO2R group.
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Affiliation(s)
- Ryosei Koyama
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
| | - Masahiro Anada
- Faculty of Pharmacy, Musashino University, Nishitokyo, Tokyo 202-8585, Japan
- Research Institute of Pharmaceutical Sciences, Musashino University, Nishitokyo, Tokyo 202-8585, Japan
| | - Shunsuke Sueki
- Faculty of Pharmacy, Musashino University, Nishitokyo, Tokyo 202-8585, Japan
- Research Institute of Pharmaceutical Sciences, Musashino University, Nishitokyo, Tokyo 202-8585, Japan
| | - Kosho Makino
- Faculty of Pharmacy, Musashino University, Nishitokyo, Tokyo 202-8585, Japan
- Research Institute of Pharmaceutical Sciences, Musashino University, Nishitokyo, Tokyo 202-8585, Japan
| | - Tatsuhiro Kojima
- Department of Applied Chemistry, Kobe City College of Technology (KCCT), 8-3 Gakuen-Higashimachi, Nishi-ku, Kobe, 651-2194, Japan
| | - Tomoko Kawasaki-Takasuka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
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5
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Amano K, Kawasaki-Takasuka T, Mori K. Synthesis of Polysubstituted Naphthalenes by a Hydride Shift Mediated C-H Bond Functionalization/Aromatization Sequence. Org Lett 2024; 26:1824-1827. [PMID: 38416568 DOI: 10.1021/acs.orglett.3c04355] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
A synthetic strategy for forming multisubstituted naphthalenes based on hydride shift mediated C(sp3)-H bond functionalization was developed. This strategy consists of three successive transformations: (1) an intramolecular hydride shift mediated C(sp3)-H bond functionalization; (2) a decarboxylative fragmentation; and (3) an oxidation reaction. When benzylidene malonates having a 2-alkoxyethyl group at the ortho position were treated with a catalytic amount of Al(OTf)3, the hydride shift/cyclization reaction proceeded smoothly to afford tetralin derivatives in good chemical yields. The resulting tetralins were easily converted into naphthalenes by exposing them to modified Krapcho decarboxylation reaction conditions (LiCl, DMSO, and heating under an O2 atmosphere). The one-pot operation of these two reactions was also realized.
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Affiliation(s)
- Koutarou Amano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Tomoko Kawasaki-Takasuka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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6
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Okawa H, Kawasaki-Takasuka T, Mori K. Silyl-Group Boosted Internal Redox Reaction: Hydride Shift from an Aliphatic Secondary Position for the Formation of Six- and Seven-Membered Carbocycles. Org Lett 2024; 26:1662-1666. [PMID: 38382544 DOI: 10.1021/acs.orglett.4c00140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
We report a hydride shift/cyclization reaction at the aliphatic secondary position (methylene group). The key to accomplishing this reaction was the employment of benzylidene malonate having a silyl group β to the hydride donor carbon. When the corresponding malonates were treated with a catalytic amount of Al(OTf)3, the [1,5]-hydride shift from the simple aliphatic secondary position proceeded smoothly to afford silyl-group substituted tetralin derivatives in excellent chemical yields (up to 98%). This reaction system was applied to the formation of seven-membered carbocycles via the [1,6]-hydride shift mediated process.
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Affiliation(s)
- Hiroto Okawa
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Tomoko Kawasaki-Takasuka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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7
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Feng QY, Mao YQ, Wang MX, Tong S. Chiral Crown Ethers Accessed from Catalytic Enantioselective Desymmetrization Reactions. Org Lett 2022; 24:7107-7112. [PMID: 36148969 DOI: 10.1021/acs.orglett.2c02688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A diversity of unprecedented chiral aza-crown ethers were synthesized straightforwardly from readily available and inexpensive aza-crown ethers. Catalyzed by a chiral phosphoric acid, desymmetrization of an array of symmetric N-arylated aza-crown ethers through tert-amino reaction proceeded efficiently under mild conditions to produce novel tetrahydroquinoline-fused aza-crown ethers in good to excellent yields with up to 96% ee. Our strategy opens a new route to functionalized chiral crown ethers.
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Affiliation(s)
- Qi-Yun Feng
- MOE Key Laboratory of Bioorganic Phosphorus and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yu-Qi Mao
- MOE Key Laboratory of Bioorganic Phosphorus and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Mei-Xiang Wang
- MOE Key Laboratory of Bioorganic Phosphorus and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Shuo Tong
- MOE Key Laboratory of Bioorganic Phosphorus and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
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8
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[1,5]-Hydride Shift Triggered N-Dealkylative Cyclization into 2-Oxo-1,2,3,4-tetrahydroquinoline-3-carboxylates via Boronate Complexes. Molecules 2022; 27:molecules27165270. [PMID: 36014513 PMCID: PMC9414529 DOI: 10.3390/molecules27165270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 11/23/2022] Open
Abstract
A new simple one-pot two-step protocol for the synthesis of 2-oxo-1,2,3,4-tetrahydroquinoline-3-carboxylate from 2-(2-(benzylamino)benzylidene)malonate under the action of BF3·Et2O was developed. It was shown that the reaction proceeds through the formation of a stable iminium intermediate containing a difluoroboryl bridge in the dicarbonyl fragment of the molecule.
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9
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Zaitseva E, Smirnov A, Timashev V, Malyshev W, Zhigileva E, Mikhaylov A, Medvedev M, Baleeva N, Baranov MS. BF3 mediated [1,5]‐Hydride Shift Triggered Cyclization: Thioethers Join the Game. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200547] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elvira Zaitseva
- IBCh RAS: FBGUN Institut bioorganiceskoj himii im akademikov M M Semakina i U A Ovcinnikova Rossijskoj akademii nauk Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Alexander Smirnov
- IBCh RAS: FBGUN Institut bioorganiceskoj himii im akademikov M M Semakina i U A Ovcinnikova Rossijskoj akademii nauk Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Vladimir Timashev
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Wadim Malyshev
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Ekaterina Zhigileva
- IBCh RAS: FBGUN Institut bioorganiceskoj himii im akademikov M M Semakina i U A Ovcinnikova Rossijskoj akademii nauk Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Andrey Mikhaylov
- IBCh RAS: FBGUN Institut bioorganiceskoj himii im akademikov M M Semakina i U A Ovcinnikova Rossijskoj akademii nauk Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Michael Medvedev
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Nadezhda Baleeva
- IBCh RAS: FBGUN Institut bioorganiceskoj himii im akademikov M M Semakina i U A Ovcinnikova Rossijskoj akademii nauk Department of Chemistry Moskva RUSSIAN FEDERATION
| | - Mikhail S. Baranov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences Group of chemistry of heterocyclic compounds Ulitsa Miklukho-Maklaya, 16/10 117997 Moscow RUSSIAN FEDERATION
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10
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Mori K. C(sp3)–H Bond Functionalization Mediated by Hydride Shift/Cyclization System. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20210420] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588
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11
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Zhou X, Yeung C, Kwok Chan WT, Law G. Diastereoselective Bidirectional C(
sp
3
)−H Bond Functionalization of Piperazine Compounds. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiao‐Le Zhou
- State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University, Hung Hom Kowloon Hong Kong SAR People's Republic of China
- Present address: Beijing University of Chemical Technology People's Republic of China
| | - Chi‐Tung Yeung
- State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University, Hung Hom Kowloon Hong Kong SAR People's Republic of China
- The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000 People's Republic of China
| | - Wesley Ting Kwok Chan
- State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University, Hung Hom Kowloon Hong Kong SAR People's Republic of China
| | - Ga‐Lai Law
- State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University, Hung Hom Kowloon Hong Kong SAR People's Republic of China
- The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000 People's Republic of China
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12
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Xie R, Chen S, Wang Y, Yin X, Li SS, Xu L, Wang L. Controllable construction of pharmaceutically significant scaffolds of 2,3-dihydroquinolin-4-one and benzoazepine-5-one via redox-neutral cascade hydride transfer/cyclization. Org Chem Front 2022. [DOI: 10.1039/d2qo01103d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The scaffolds of 2,3-dihydroquinolin-4-one and benzoazepine-5-one were controllably constructed relying on cascade condensation/redox-neutral [1,6]/[1,7]-hydride transfer/cyclization from 2-aminoacetophenone and various aldehydes as well as isatins.
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Affiliation(s)
- Ronghao Xie
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Rd. #700, Qingdao 266109, P. R. China
| | - Shixiao Chen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, No. 5 Yushan Road, Qingdao, 266003, P. R. China
| | - Yufeng Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Rd. #700, Qingdao 266109, P. R. China
| | - Xiangcong Yin
- Hematology Diagnosis Laboratory, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P. R. China
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Rd. #700, Qingdao 266109, P. R. China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Rd. #700, Qingdao 266109, P. R. China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Rd. #700, Qingdao 266109, P. R. China
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13
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Zhang BB, Peng S, Wang F, Lu C, Nie J, Chen Z, Yang G, Ma C. Borane-catalyzed cascade Friedel–Crafts alkylation/[1,5]-hydride transfer/Mannich cyclization to afford tetrahydroquinolines. Chem Sci 2022; 13:775-780. [PMID: 35173942 PMCID: PMC8768868 DOI: 10.1039/d1sc05629h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 12/20/2021] [Indexed: 12/15/2022] Open
Abstract
We report a redox-neutral annulation reaction of tertiary amines with electron-deficient alkynes under metal-free and oxidant-free conditions.
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Affiliation(s)
- Bei-Bei Zhang
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
| | - Shuo Peng
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
| | - Feiyi Wang
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
| | - Cuifen Lu
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
| | - Junqi Nie
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
| | - Zuxing Chen
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
| | - Guichun Yang
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
| | - Chao Ma
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, College of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China
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14
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Hoshino D, Mori K. Divergent Access to Seven/Five-Membered Rings Based on [1,6]-Hydride Shift/Cyclization Process. Org Lett 2021; 23:9403-9407. [PMID: 34846903 DOI: 10.1021/acs.orglett.1c03523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have achieved a divergent access to seven/five-membered rings based on a [1,6]-hydride shift/cyclization process from benzylidenemalonate with an o-alkoxymethyl group. Whereas Yb(OTf)3 afforded benzoxepines (with a seven-membered ring) selectively, indanes (with a five-membered ring) were the main products when Sc(OTf)3 was employed.
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Affiliation(s)
- Daiki Hoshino
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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15
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Mikhaylov AA, Shirokova VV, Ikonnikova VA, Solyev PN, Lushpa VA, Korlyukov AA, Volodin AD, Baleeva NS, Baranov MS. 1,5-Hydride-Shift-Triggered Cyclization for the Synthesis of Unsymmetric Julolidines. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1559-2728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AbstractDirectly accessible 8-substituted tetrahydroquinolines undergo 1,5-hydride-shift-triggered cyclization to provide difficult to access julolidine derivatives in yields of 21–98% under scandium(III) triflate catalysis. Additionally, the scope of the reaction, several follow-up transformations and a remarkable side process discovered during optimization of the conditions are highlighted.
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Affiliation(s)
- Andrey A. Mikhaylov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
- National Research University Higher School of Economics
| | - Vasilissa V. Shirokova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
- Higher Chemical College, D.I. Mendeleev University of Chemical Technology of Russia
| | - Viktoria A. Ikonnikova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
- Higher Chemical College, D.I. Mendeleev University of Chemical Technology of Russia
| | - Pavel N. Solyev
- Engelhardt Institute of Molecular Biology of the Russian Academy of Sciences
| | - Vladislav A. Lushpa
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
| | | | | | - Nadezhda S. Baleeva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
| | - Mikhail S. Baranov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences
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16
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Mondal MA, Mondal S, Khan AA. Synthesis of Functionalized Quinazolinones via Acid‐Catalyzed Redox Neutral Reaction. ChemistrySelect 2021. [DOI: 10.1002/slct.202102976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mohabul A. Mondal
- Department of Chemistry Jadavpur University Jadavpur Kolkata 700032 India
| | - Sudipta Mondal
- Department of Chemistry Jadavpur University Jadavpur Kolkata 700032 India
| | - Abdul A. Khan
- Department of Chemistry Jadavpur University Jadavpur Kolkata 700032 India
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17
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Stereoselective synthesis of highly congested tetralin-fused spirooxindoles with hydroxy group: Pseudo oxygen atom induced hydride shift/cyclization process. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153408] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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18
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Zhou R, Paradies J. Borane Catalyzed Redox Isomerization of 2‐Amino Chalcones: Hydride Abstraction or Hydride Migration? European J Org Chem 2021. [DOI: 10.1002/ejoc.202100883] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Rundong Zhou
- Chemistry Department Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Jan Paradies
- Chemistry Department Paderborn University Warburger Strasse 100 33098 Paderborn Germany
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19
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Mazumdar W, Driver TG. Recent Advances in the Development of Catalytic Methods that Construct Medium-ring Lactams, Partially Saturated Benzazepines and their Derivatives. SYNTHESIS-STUTTGART 2021; 53:1734-1748. [PMID: 34421133 DOI: 10.1055/s-0040-1705995] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recent catalytic methods to construct medium-sized lactams and partially saturated benzazepines and their derivatives are surveyed. The review is divided into the following sections: 1 Introduction 2 Non-Transition Metal Catalyzed Reactions 2.1 Beckmann Rearrangement 2.2 Non-Beckmann Rearrangement Reactions 2.3 Multi-component reactions 3 Transition Metal-Catalyzed Reactions 3.1 Au-catalyzed reactions to access medium-sized N-heterocycles 3.2 Reactions involving a metal η3-complex catalytic intermediate 3.3 Transition metal-catalyzed reactions of strained cycloalkanes 4 Conclusions.
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Affiliation(s)
- Wrickban Mazumdar
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, USA, 60607
| | - Tom G Driver
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, USA, 60607
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20
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Connon R, Roche B, Rokade BV, Guiry PJ. Further Developments and Applications of Oxazoline-Containing Ligands in Asymmetric Catalysis. Chem Rev 2021; 121:6373-6521. [PMID: 34019404 PMCID: PMC8277118 DOI: 10.1021/acs.chemrev.0c00844] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Indexed: 12/27/2022]
Abstract
The chiral oxazoline motif is present in many ligands that have been extensively applied in a series of important metal-catalyzed enantioselective reactions. This Review aims to provide a comprehensive overview of the most significant applications of oxazoline-containing ligands reported in the literature starting from 2009 until the end of 2018. The ligands are classified not by the reaction to which their metal complexes have been applied but by the nature of the denticity, chirality, and donor atoms involved. As a result, the continued development of ligand architectural design from mono(oxazolines), to bis(oxazolines), to tris(oxazolines) and tetra(oxazolines) and variations thereof can be more easily monitored by the reader. In addition, the key transition states of selected asymmetric transformations will be given to illustrate the features that give rise to high levels of asymmetric induction. As a further aid to the reader, we summarize the majority of schemes with representative examples that highlight the variation in % yields and % ees for carefully selected substrates. This Review should be of particular interest to the experts in the field but also serve as a useful starting point to new researchers in this area. It is hoped that this Review will stimulate both the development/design of new ligands and their applications in novel metal-catalyzed asymmetric transformations.
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Affiliation(s)
- Robert Connon
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Brendan Roche
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Balaji V. Rokade
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
| | - Patrick J. Guiry
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
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21
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Wicker G, Schoch R, Paradies J. Diastereoselective Synthesis of Dihydro-quinolin-4-ones by a Borane-Catalyzed Redox-Neutral endo-1,7-Hydride Shift. Org Lett 2021; 23:3626-3630. [PMID: 33843243 DOI: 10.1021/acs.orglett.1c01018] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The borane-catalyzed synthesis of dihydroquinoline-4-ones is developed. The amino-substituted chalcones undergo a 1,7-hydride shift upon Lewis acid activation to form a zwitterionic iminium enolate, which collapses to the dihydroquinoline-4-one scaffold. The reaction proceeds in high yields (75-99%) with an excellent diastereoselectivity of up to >99:1 (cis:trans). The reaction mechanism is investigated by kinetic, isotope labeling, and computational experiments.
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Affiliation(s)
- Garrit Wicker
- Paderborn University, Chemistry Department, Warburger-Strasse 100, D-33098 Paderborn, Germany
| | - Roland Schoch
- Paderborn University, Chemistry Department, Warburger-Strasse 100, D-33098 Paderborn, Germany
| | - Jan Paradies
- Paderborn University, Chemistry Department, Warburger-Strasse 100, D-33098 Paderborn, Germany
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22
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Yang WL, Liu TT, Ni T, Zhu B, Luo X, Deng WP. Iridium-Catalyzed Asymmetric Cascade Allylation/Pictet-Spengler Cyclization Reaction for the Enantioselective Synthesis of 1,3,4-Trisubstituted Tetrahydroisoquinolines. Org Lett 2021; 23:2790-2796. [PMID: 33734718 DOI: 10.1021/acs.orglett.1c00709] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An iridium-catalyzed trifluoroacetic acid-promoted asymmetric cascade allylation/Pictet-Spengler cyclization reaction of azomethine ylides with aromatic allylic alcohols is reported. This protocol provides a facile and scalable method for the construction of 1,3,4-trisubstituted tetrahydroisoquinolines containing two stereogenic centers in good yields (up to 96%) with generally excellent diastereo- and enantioselectivities (up to >20:1 dr and >99% ee). Furthermore, a series of aromatic heterocycle-fused piperidines were also obtained with excellent enantiocontrol by this methodology.
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23
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Chang Y, Cao M, Chan JZ, Zhao C, Wang Y, Yang R, Wasa M. Enantioselective Synthesis of N-Alkylamines through β-Amino C-H Functionalization Promoted by Cooperative Actions of B(C 6F 5) 3 and a Chiral Lewis Acid Co-Catalyst. J Am Chem Soc 2021; 143:2441-2455. [PMID: 33512998 DOI: 10.1021/jacs.0c13200] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We disclose a catalytic method for β-C(sp3)-H functionalization of N-alkylamines for the synthesis of enantiomerically enriched β-substituted amines, entities prevalent in pharmaceutical compounds and used to generate different families of chiral catalysts. We demonstrate that a catalyst system comprising of seemingly competitive Lewis acids, B(C6F5)3, and a chiral Mg- or Sc-based complex, promotes the highly enantioselective union of N-alkylamines and α,β-unsaturated compounds. An array of δ-amino carbonyl compounds was synthesized under redox-neutral conditions by enantioselective reaction of a N-alkylamine-derived enamine and an electrophile activated by the chiral Lewis acid co-catalyst. The utility of the approach is highlighted by late-stage β-C-H functionalization of bioactive amines. Investigations in regard to the mechanistic nuances of the catalytic processes are described.
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Affiliation(s)
- Yejin Chang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Min Cao
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Jessica Z Chan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Cunyuan Zhao
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yuankai Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Rose Yang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Masayuki Wasa
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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24
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Zaitseva ER, Smirnov AY, Myasnyanko IN, Mineev KS, Sokolov AI, Volkhina TN, Mikhaylov AA, Baleeva NS, Baranov MS. Imidazol-5-ones as a substrate for [1,5]-hydride shift triggered cyclization. NEW J CHEM 2021. [DOI: 10.1039/d0nj05738j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
(2-Aminobenzylidene)-imidazolones were used as substrates for [1,5]-hydride shift triggered cyclization under promotion by TiCl4 at room temperature.
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Affiliation(s)
- Elvira R. Zaitseva
- Institute of Bioorganic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
- D. Mendeleev University of Chemical Technology of Russia
| | | | - Ivan N. Myasnyanko
- Institute of Bioorganic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | | | | | - Tatyana N. Volkhina
- D. Mendeleev University of Chemical Technology of Russia
- 9 Miusskaya Sq
- Moscow
- Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds
| | | | | | - Mikhail S. Baranov
- Institute of Bioorganic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
- Pirogov Russian National Research Medical University
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25
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Guo M, Dong F, Yin X, Xu L, Wang L, Li SS. Facile syntheses of tetrahydroquinolines and 1,2-dihydroquinolines via vinylogous cascade hydride transfer/cyclization. Org Chem Front 2021. [DOI: 10.1039/d0qo01622e] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The medicinally significant 3-monosubstituted tetrahydroquinolines and 1,2-dihydroquinolines were controllably constructed via redox-neutral vinylogous cascade condensation/[1,5]-hydride transfer/cyclization in EtOH.
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Affiliation(s)
- Mengzhu Guo
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Fengying Dong
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Xiangcong Yin
- Hematology Diagnosis Laboratory
- The Affiliated Hospital of Qingdao University
- Qingdao
- P. R. China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
- College of Chemistry and Molecular Engineering
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
- College of Chemistry and Molecular Engineering
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26
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Rostoll‐Berenguer J, Blay G, Pedro JR, Vila C. Asymmetric Oxidative Mannich Reactions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001017] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jaume Rostoll‐Berenguer
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - Gonzalo Blay
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - José R. Pedro
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - Carlos Vila
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
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27
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Xing Y, Dong F, Yin X, Wang L, Li S. Facile Construction of 3,4‐dihydro‐2H‐1,2,4‐Benzothiadiazine 1,1‐Dioxides via Redox‐Neutral Cascade Condensation/[1,7]‐Hydride Transfer/Cyclization. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yingying Xing
- College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural University No.700, Changcheng Rd. Qingdao 266109 P. R. China
| | - Fengying Dong
- College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural University No.700, Changcheng Rd. Qingdao 266109 P. R. China
| | - Xiangcong Yin
- Hematology Diagnosis Laboratory The Affiliated Hospital of Qingdao University No. 16, Jiangsu Rd. Qingdao 266003 P. R. China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural University No.700, Changcheng Rd. Qingdao 266109 P. R. China
- Shandong Key Laboratory of Biochemical Analysis; College of Chemistry and Molecular Engineering Qingdao University of Science and Technology No.53, Zhengzhou Rd. Qingdao 266042 P. R. China
| | - Shuai‐Shuai Li
- College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural University No.700, Changcheng Rd. Qingdao 266109 P. R. China
- Shandong Key Laboratory of Biochemical Analysis; College of Chemistry and Molecular Engineering Qingdao University of Science and Technology No.53, Zhengzhou Rd. Qingdao 266042 P. R. China
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28
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Hoshino D, Mori K. Rapid access to 3-indolyl-1-trifluoromethyl-isobenzofurans by hybrid use of Lewis/Brønsted acid catalysts. Org Biomol Chem 2020; 18:6602-6606. [PMID: 32815970 DOI: 10.1039/d0ob01582b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report herein a rapid access to 3-indolyl-1-trifluoromethyl-isobenzofurans via a [1,4]-hydride shift/cyclizatin/intermolecular nucleophilic addition reaction sequence. In this process, a Lewis acid promoted internal redox reaction ([1,4]-hydride shift/cyclization) followed by a Brønsted acid promoted intermolecular reaction (generation of cyclic oxonium cation/intermolecular Friedel-Crafts reaction) occurred to give various 3-indolyl-1-trifluoromethyl-isobenzofurans in good chemical yields.
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Affiliation(s)
- Daiki Hoshino
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
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29
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Yokoo K, Sakai D, Mori K. Highly Stereoselective Synthesis of Fused Tetrahydropyrans via Lewis-Acid-Promoted Double C(sp3)–H Bond Functionalization. Org Lett 2020; 22:5801-5805. [DOI: 10.1021/acs.orglett.0c01867] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuma Yokoo
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Dan Sakai
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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30
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Van Craen D, Flynn IG, Carta V, Flood AH. Bimetallic Bis-anion Cascade Complexes of Magnesium in Nonaqueous Solution. Inorg Chem 2020; 59:5939-5948. [DOI: 10.1021/acs.inorgchem.9b03710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Van Craen
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405-7102, United States
| | - Ian G. Flynn
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405-7102, United States
| | - Veronica Carta
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405-7102, United States
| | - Amar H. Flood
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405-7102, United States
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31
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Saito K, Miyashita H, Ito Y, Yamanaka M, Akiyama T. Oxidative Kinetic Resolution of Acyclic Amines Based on Equilibrium Control. Org Lett 2020; 22:3128-3134. [DOI: 10.1021/acs.orglett.0c00887] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kodai Saito
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Hiromitsu Miyashita
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Yui Ito
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Masahiro Yamanaka
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Takahiko Akiyama
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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32
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Yokoo K, Mori K. Expeditious Synthesis of Multisubstituted Quinolinone Derivatives Based on Ring Recombination Strategy. Org Lett 2020; 22:244-248. [PMID: 31834806 DOI: 10.1021/acs.orglett.9b04224] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We achieved a concise construction of 3-substituted quinolinone derivatives based on a ring recombination strategy. In this process, seven transformations involving two types of cyclization proceeded in one pot to afford various quinolinone derivatives in good to excellent chemical yields (up to 98%).
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Affiliation(s)
- Kazuma Yokoo
- Department of Applied Chemistry , Graduate School of Engineering, Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan
| | - Keiji Mori
- Department of Applied Chemistry , Graduate School of Engineering, Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan
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33
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Sun Y, Hu M, Fu S, Liu B. Recent advances in alkaline earth metal-enabled syntheses of heterocyclic compounds. Org Biomol Chem 2020; 18:6443-6466. [DOI: 10.1039/d0ob01233e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review summarizes recent progress in alkaline earth metal enabled syntheses of heterocyclic compounds.
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Affiliation(s)
- Ying Sun
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
| | - Mengqin Hu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
| | - Shaomin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
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34
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Kataoka M, Otawa Y, Ido N, Mori K. Highly Diastereoselective Synthesis of Medium-Sized Carbocycle-Fused Piperidines via Sequential Hydride Shift Triggered Double C(sp3)–H Bond Functionalization. Org Lett 2019; 21:9334-9338. [DOI: 10.1021/acs.orglett.9b03498] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Miyabi Kataoka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Yuna Otawa
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Natsuki Ido
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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35
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Zhao S, Wang X, Wang P, Wang G, Zhao W, Tang X, Guo M. BF3·OEt2-Promoted Propargyl Alcohol Rearrangement/[1,5]-Hydride Transfer/Cyclization Cascade Affording Tetrahydroquinolines. Org Lett 2019; 21:3990-3993. [DOI: 10.1021/acs.orglett.9b01153] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuang Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiaoyang Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Pengfei Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Guangwei Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Wentao Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangyang Tang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Minjie Guo
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
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36
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37
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Tamura R, Kitamura E, Tsutsumi R, Yamanaka M, Akiyama T, Mori K. Diastereoselective Synthesis of CF 3-Substituted Spiroisochromans by [1,5]-Hydride Shift/Cyclization/Intramolecular Friedel-Crafts Reaction Sequence. Org Lett 2019; 21:2383-2387. [PMID: 30882229 DOI: 10.1021/acs.orglett.9b00668] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Developed herein is a diastereoselective synthesis of CF3-substituted spiroisochromans via C(sp3)-H bond functionalization involving sequential transformations ([1,5]-hydride shift/cyclization/elimination of MeOH/intramolecular Friedel-Crafts reaction).
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Affiliation(s)
- Risa Tamura
- Department of Applied Chemistry, Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan
| | - Eriko Kitamura
- Department of Chemistry, Faculty of Science , Gakushuin University , Mejiro, Toshima-ku , Tokyo 171-8588 , Japan
| | - Ryosuke Tsutsumi
- Department of Chemistry and Research Center for Smart Molecules , Rikkyo University , 3-34-1 Nishi-Ikebukuro , Toshima-ku , Tokyo 171-8501 , Japan
| | - Masahiro Yamanaka
- Department of Chemistry and Research Center for Smart Molecules , Rikkyo University , 3-34-1 Nishi-Ikebukuro , Toshima-ku , Tokyo 171-8501 , Japan
| | - Takahiko Akiyama
- Department of Chemistry, Faculty of Science , Gakushuin University , Mejiro, Toshima-ku , Tokyo 171-8588 , Japan
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan
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38
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Chen Y, He Y, Zhang S, Miao T, Fan Q. Rapid Construction of Structurally Diverse Quinolizidines, Indolizidines, and Their Analogues via Ruthenium‐Catalyzed Asymmetric Cascade Hydrogenation/Reductive Amination. Angew Chem Int Ed Engl 2019; 58:3809-3813. [DOI: 10.1002/anie.201812647] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Ya Chen
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yan‐Mei He
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Shanshan Zhang
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Tingting Miao
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Qing‐Hua Fan
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 P. R. China
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39
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Itoh K, Sibi MP. Dibenzofuran-4,6-bis(oxazoline) (DBFOX). A novel trans-chelating bis(oxazoline) ligand for asymmetric reactions. Org Biomol Chem 2019; 16:5551-5565. [PMID: 29947634 DOI: 10.1039/c8ob01010b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trans-chelating bis(oxazoline) ligand (R,R)-4,6-dibenzofurandiyl-2,2'-bis(4-phenyloxazoline) [(R,R)-DBFOX/Ph] coordinates metal ions to give C2-symmetric complexes which effectively catalyze a variety of asymmetric reactions. (R,R)-DBFOX/Ph·Ni(ClO4)2·3H2O, whose crystal structure is octahedral with three aqua ligands, can be stored under air for several months without loss of catalytic activity and promotes highly enantioselective reactions even in the presence of excess amounts of water, alcohols, amines, and acids. The complex shows remarkable chiral amplification in asymmetric Diels-Alder (DA) reactions. This review focuses on enantioselective reactions catalyzed by (R,R)-DBFOX/Ph·metal complexes.
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Affiliation(s)
- Kennosuke Itoh
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, Japan.
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40
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Chen Y, He Y, Zhang S, Miao T, Fan Q. Rapid Construction of Structurally Diverse Quinolizidines, Indolizidines, and Their Analogues via Ruthenium‐Catalyzed Asymmetric Cascade Hydrogenation/Reductive Amination. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812647] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ya Chen
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yan‐Mei He
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Shanshan Zhang
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Tingting Miao
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Qing‐Hua Fan
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences (ICCAS)University of Chinese Academy of Sciences Beijing 100190 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 P. R. China
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41
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Otawa Y, Mori K. Construction of seven- and eight-membered carbocycles by Lewis acid catalyzed C(sp3)–H bond functionalization. Chem Commun (Camb) 2019; 55:13856-13859. [DOI: 10.1039/c9cc08074k] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Concise construction of seven- or eight-membered carbocycles was accomplished by Lewis acid catalyzed C(sp3)–H bond functionalization.
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Affiliation(s)
- Yuna Otawa
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Tokyo 184-8588
- Japan
| | - Keiji Mori
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Tokyo 184-8588
- Japan
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42
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Liu S, Zhao Z, Wang Y. Construction of N-Heterocycles through Cyclization of Tertiary Amines. Chemistry 2018; 25:2423-2441. [PMID: 30357981 DOI: 10.1002/chem.201803960] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Indexed: 12/27/2022]
Abstract
N-Heterocycles have been found in a large number of natural products, drug molecules, and bioactive compounds, and they thereby play a vital role in diverse research disciplines including drug discovery, organic synthesis, chemical biology, and material science. To this end, the development of new methods and strategies for the construction of N-heterocyclic frameworks is arguably one of the most dynamic and significant research areas in organic synthesis. One of these powerful approaches to the synthesis of N-heterocycles is to establish cyclization reactions based on the transformation of tertiary amines, which has emerged as an attractive research topic. In this Minireview, the significant achievements in the construction of N-heterocycles through cyclization of tertiary amines are highlighted and a comprehensive overview of the rational design, development, and application of these synthetic methods is presented.
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Affiliation(s)
- Shuya Liu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Nanlu, Jinan, 250100, Shandong, P. R. China
| | - Zhiguo Zhao
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Nanlu, Jinan, 250100, Shandong, P. R. China
| | - Yao Wang
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Nanlu, Jinan, 250100, Shandong, P. R. China
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43
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Copper-catalyzed intramolecular redox reaction: Asymmetric synthesis of chiral 2-(1H-pyrrol-1-yl)-mandelic acid esters. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.11.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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44
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Mori K, Umehara N, Akiyama T. Highly diastereoselective synthesis of tricyclic fused-pyrans by sequential hydride shift mediated double C(sp 3)-H bond functionalization. Chem Sci 2018; 9:7327-7331. [PMID: 30542535 PMCID: PMC6237131 DOI: 10.1039/c8sc02103a] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 06/23/2018] [Indexed: 11/23/2022] Open
Abstract
Described herein is the Brønsted acid-catalyzed double C(sp3)-H bond functionalization of alkyl phenethyl ether derivatives. In this process, a [1,5]-[1,5]-hydride shift occurred successively to afford tricyclic fused pyran derivatives in excellent chemical yields with excellent diastereoselectivities (up to >20 : 1). The key to achieve this reaction was the introduction of two methyl groups at the benzylic position, which was effective in both hydride shift processes: (1) the Thorpe-Ingold effect for the first hydride shift and (2) conformational control in the second hydride shift.
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Affiliation(s)
- Keiji Mori
- Department of Chemistry , Faculty of Science , Gakushuin University , 1-5-1 Mejiro, Toshima-ku , Tokyo 171-8588 , Japan . ; ; Tel: +81-3-3986-0221
- Department of Applied Chemistry , Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho, Koganei , Tokyo 184-8588 , Japan
| | - Nobuaki Umehara
- Department of Chemistry , Faculty of Science , Gakushuin University , 1-5-1 Mejiro, Toshima-ku , Tokyo 171-8588 , Japan . ; ; Tel: +81-3-3986-0221
| | - Takahiko Akiyama
- Department of Chemistry , Faculty of Science , Gakushuin University , 1-5-1 Mejiro, Toshima-ku , Tokyo 171-8588 , Japan . ; ; Tel: +81-3-3986-0221
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45
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Liu S, Zhao T, Qu J, Wang B. Expedient Synthesis of 1,4‐Benzodiazepines via a Tandem Condensation/[1,5]‐Hydride Transfer/Cyclization Process. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800781] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Siyuan Liu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
| | - Tuan Zhao
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
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46
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Shang M, Chan JZ, Cao M, Chang Y, Wang Q, Cook B, Torker S, Wasa M. C-H Functionalization of Amines via Alkene-Derived Nucleophiles through Cooperative Action of Chiral and Achiral Lewis Acid Catalysts: Applications in Enantioselective Synthesis. J Am Chem Soc 2018; 140:10593-10601. [PMID: 30045617 DOI: 10.1021/jacs.8b06699] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Catalytic transformations of α-amino C-H bonds to afford valuable enantiomerically enriched α-substituted amines, entities that are prevalent in pharmaceuticals and bioactive natural products, have been developed. Typically, such processes are carried out under oxidative conditions and require precious metal-based catalysts. Here, we disclose a strategy for an enantioselective union of N-alkylamines and α,β-unsaturated compounds, performed under redox-neutral conditions, and promoted through concerted action of seemingly competitive Lewis acids, B(C6F5)3, and a chiral Mg-PyBOX complex. Thus, a wide variety of β-amino carbonyl compounds may be synthesized, with complete atom economy, through stereoselective reaction of an in situ-generated enantiomerically enriched Mg-enolate and an appropriate electrophile.
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Affiliation(s)
- Ming Shang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Jessica Z Chan
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Min Cao
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Yejin Chang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Qifan Wang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Brennan Cook
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Masayuki Wasa
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
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47
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Hisano N, Kamei Y, Kansaku Y, Yamanaka M, Mori K. Construction of 1,3-Dithio-Substituted Tetralins by [1,5]-Alkylthio Group Transfer Mediated Skeletal Rearrangement. Org Lett 2018; 20:4223-4226. [PMID: 29957962 DOI: 10.1021/acs.orglett.8b01610] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel skeletal rearrangement involving a [1,5]-alkylthio group transfer/cyclization sequence is described. Treatment of benzylidene malonates having a thioketal moiety at the homobenzyl position with a catalytic amount of Sc(OTf)3 afforded alkylthio group rearranged adducts in good chemical yields. Detailed investigation of the reaction mechanism revealed that an intramolecular conjugate addition/ring opening sequence (not through-space transfer) is the key to achieving this reaction.
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Affiliation(s)
- Naoya Hisano
- Department of Applied Chemistry, Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan
| | - Yuto Kamei
- Department of Chemistry and Research Center for Smart Molecules , Rikkyo University , 3-34-1 Nishi-Ikebukuro , Toshima-ku, Tokyo 171-8501 , Japan
| | - Yaoki Kansaku
- Department of Chemistry and Research Center for Smart Molecules , Rikkyo University , 3-34-1 Nishi-Ikebukuro , Toshima-ku, Tokyo 171-8501 , Japan
| | - Masahiro Yamanaka
- Department of Chemistry and Research Center for Smart Molecules , Rikkyo University , 3-34-1 Nishi-Ikebukuro , Toshima-ku, Tokyo 171-8501 , Japan
| | - Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan
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48
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Liu S, Qu J, Wang B. Substrate-controlled divergent synthesis of polycyclic indoloazepines and indolodiazepines via 1,5-hydride shift/7-cyclization cascades. Chem Commun (Camb) 2018; 54:7928-7931. [PMID: 29951657 DOI: 10.1039/c8cc03804j] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Novel and practical acid-catalyzed cyclization of 2-indolyl aryl carbinols via tandem dehydration/1,5-hydride shift/7-cyclization sequences has been developed. By appropriate variation of the substrate, diverse polycyclic-fused indoles were synthesized in good yield, thus demonstrating the high efficiency, transition-metal-free nature, and high step/atom economy of the synthesis strategy.
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Affiliation(s)
- Siyuan Liu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, P. R. China.
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49
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Tóth L, Mándi A, Váradi D, Kovács T, Szabados A, Kiss-Szikszai A, Gong Q, Zhang H, Mátyus P, Antus S, Kurtán T. HPLC-ECD and TDDFT-ECD study of hexahydropyrrolo[1,2-a]quinoline derivatives. Chirality 2018; 30:866-874. [DOI: 10.1002/chir.22969] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 11/05/2022]
Affiliation(s)
- László Tóth
- Department of Organic Chemistry; University of Debrecen; Debrecen Hungary
- Department of Organic Chemistry; Semmelweis University; Budapest Hungary
| | - Attila Mándi
- Department of Organic Chemistry; University of Debrecen; Debrecen Hungary
| | - Dániel Váradi
- Department of Organic Chemistry; University of Debrecen; Debrecen Hungary
| | - Tibor Kovács
- Department of Organic Chemistry; University of Debrecen; Debrecen Hungary
| | - Anna Szabados
- Department of Organic Chemistry; University of Debrecen; Debrecen Hungary
| | | | - Qi Gong
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai China
| | - Haiyan Zhang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai China
| | - Péter Mátyus
- Institute of Digital Health Sciences; Semmelweis University; Budapest Hungary
| | - Sándor Antus
- Department of Organic Chemistry; University of Debrecen; Debrecen Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry; University of Debrecen; Debrecen Hungary
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50
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Mori K, Isogai R, Kamei Y, Yamanaka M, Akiyama T. Chiral Magnesium Bisphosphate-Catalyzed Asymmetric Double C(sp3)–H Bond Functionalization Based on Sequential Hydride Shift/Cyclization Process. J Am Chem Soc 2018; 140:6203-6207. [DOI: 10.1021/jacs.8b02761] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Keiji Mori
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Ryo Isogai
- Department of Chemistry, Faculty of Science, Gakushuin University, Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Yuto Kamei
- Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Masahiro Yamanaka
- Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Takahiko Akiyama
- Department of Chemistry, Faculty of Science, Gakushuin University, Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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