1
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Sherborne GJ, Diène C, Kemmitt P, Smith AD. Access to a Diverse Array of Bridged Benzo[1,5]oxazocine and Benzo[1,4]diazepine Structures. Org Lett 2023. [PMID: 37996078 DOI: 10.1021/acs.orglett.3c03392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
The preparation of bridged benzo[1,5]oxazocines and benzo[1,4]diazepines is demonstrated from simple aniline and aldehyde starting materials. A one-pot condensation/6π electrocyclization is followed by an intramolecular trapping of the 2,3-dihydroquinoline intermediate by nitrogen or oxygen nucleophiles to give bridged seven- and eight-membered products. Using 3-hydroxypyridinecarboxaldehydes results in a stable zwitterionic structure that can undergo a diastereoselective reduction under hydrogenative conditions. A similar cyclization/hydrogenation pathway with excellent diastereoselectivity is also demonstrated from 2-pyridyl-substituted 1,2,3,4-tetrahydroquinolines.
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Affiliation(s)
- Grant J Sherborne
- Medicinal Chemistry Oncology R&D, Research and Early Development, AstraZeneca, The Discovery Centre, Cambridge Biomedical Campus, 1 Francis Crick Avenue, Cambridge CB2 0AA, U.K
| | - Coura Diène
- Medicinal Chemistry Oncology R&D, Research and Early Development, AstraZeneca, The Discovery Centre, Cambridge Biomedical Campus, 1 Francis Crick Avenue, Cambridge CB2 0AA, U.K
| | - Paul Kemmitt
- Medicinal Chemistry Oncology R&D, Research and Early Development, AstraZeneca, The Discovery Centre, Cambridge Biomedical Campus, 1 Francis Crick Avenue, Cambridge CB2 0AA, U.K
| | - Andrew D Smith
- EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, U.K
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2
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Xing S, Wang Y, Jin C, Shi S, Zhang Y, Liao Z, Wang K, Zhu B. Construction of Bridged Aza- and Oxa-[ n.2.1] Skeletons via an Intramolecular Formal [3+2] Cycloaddition of Aziridines and Epoxides with Electron-Deficient Alkenes. J Org Chem 2022; 87:6426-6431. [PMID: 35439001 DOI: 10.1021/acs.joc.2c00287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An intramolecular formal [3+2] cycloaddition of activated aziridines and epoxides with electron-deficient alkene has been developed for the general and efficient construction of bridged aza- and oxa-[n.2.1] (n = 3 or 4) skeletons. This strategy can be efficiently promoted by lithium iodide. To demonstrate its potential, the intramolecular formal [3+2] cycloaddition was used to access the important intermediate of homoepiboxidine.
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Affiliation(s)
- Siyang Xing
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Yuhan Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Changkun Jin
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Shaochen Shi
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Yihui Zhang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Ziya Liao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Kui Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Bolin Zhu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
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3
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Gao Y, Mao Y, Miao Z. Enantioselective 1,3-Dipolar (5+3) Cycloadditions of Oxidopyrylium Ylides and Vinylcyclopropanes toward 9-Oxabicyclononanes. Org Lett 2022; 24:3064-3068. [PMID: 35420826 DOI: 10.1021/acs.orglett.2c01037] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have developed an efficient and mild enantioselective palladium-catalyzed (5+3) cycloaddition of vinylcyclopropanes and oxidopyrylium ylides generated in situ from benzopyranones, in the presence of a chiral PHOX ligand. These reactions afford various highly functionalized bridged oxa-[3.3.1]carbocycles with three stereogenic centers that are challenging to synthesize, in moderate to good yields and enantioselectivities.
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Affiliation(s)
- Yanfeng Gao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Yuanhao Mao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Zhiwei Miao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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4
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Zeng M, Xue Y, Qin Y, Peng F, Li Q, Zeng MH. CuBr-promoted domino Biginelli reaction for the diastereoselective synthesis of bridged polyheterocycles: mechanism studies and in vitro anti-tumor activities. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.02.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Ozakai C, Kitamura K, Horikawa M, Tsunoda T, Kaku H. Base-induced isomerization of red uroleuconaphins revisited: characterization and absolute stereochemistry of the yellow aphid pigments uroleuconaphins A 2 and B 2. NEW J CHEM 2022. [DOI: 10.1039/d2nj02676g] [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
A base-induced isomerization of red uroleuconaphin A1 to yellow uroleuconaphin A2 having polycyclic acetal is described here.
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Affiliation(s)
- Chiharu Ozakai
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan
| | - Kei Kitamura
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan
| | - Mitsuyo Horikawa
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan
| | - Tetsuto Tsunoda
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan
| | - Hiroto Kaku
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan
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6
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Pyrrolidine‐Catalyzed Annulations of Quinone Monoacetals with Naphthols: Synthesis of 2‐Oxabicyclo[3.3.1]nonane Skeletons, Transformations and Reaction Mechanism. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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7
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Ming YC, Lv XJ, Liu M, Liu YK. Synthesis of Chiral Polycyclic Tetrahydrocarbazoles by Enantioselective Aminocatalytic Double Activation of 2-Hydroxycinnamaldehydes with Dienals. Org Lett 2021; 23:6515-6519. [PMID: 34374287 DOI: 10.1021/acs.orglett.1c02309] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient aminocatalytic enantioselective double-activation strategy has been developed that combines several different aminocatalytic modes in a cascade process, such as iminium ion, vinylogous iminium ion, trienamine, and dienamine activations. By using this strategy, 2-hydroxycinnamaldehydes worked well with various dienals via [4 + 2] cycloaddition and the oxa-Michael reaction-initiated cascade, respectively, leading to chiral polycyclic tetrahydrocarbazole and chromane derivatives with excellent diastereo- and enantioselectivities.
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Affiliation(s)
- Yong-Chao Ming
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xue-Jiao Lv
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Ming Liu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
| | - Yan-Kai Liu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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8
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Zhang Z, Han H, Wang L, Bu Z, Xie Y, Wang Q. Construction of bridged polycycles through dearomatization strategies. Org Biomol Chem 2021; 19:3960-3982. [PMID: 33978039 DOI: 10.1039/d1ob00096a] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Bridged polycycles are privileged molecular skeletons with wide occurrence in bioactive natural products and pharmaceuticals. Therefore, they have been the pursing target molecules of numerous chemists. The rapid and convenient generation of sp3-rich complex three-dimensional molecular skeletons from simple and easily available aromatics has made dearomatization a highly valuable synthetic tool for the construction of rigid and challenging bridged rings. This review summarizes the-state-of-the-art advances of dearomatization strategies in the application of bridged ring formation, discusses their advantages and limitations and the in-depth mechanism, and highlights their synthetic value in the total synthesis of natural products. We wish this review will provide an important reference for medicinal and synthetic chemists and will inspire further development in this intriguing research area.
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Affiliation(s)
- Ziying Zhang
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
| | - Huabin Han
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
| | - Lele Wang
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
| | - Zhanwei Bu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
| | - Yan Xie
- College of Chemistry and Materials Engineering, Quzhou University, Quzhou 324000, China.
| | - Qilin Wang
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
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9
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Burde AS, Karyakarte SD, Sylvester ED, Chemler SR. Copper-catalyzed enantioselective synthesis of bridged bicyclic ketals from 1,1-disubstituted-4-methylene-1,6-hexanediols and related alkenols. Chem Commun (Camb) 2021; 57:105-108. [PMID: 33326512 PMCID: PMC8018521 DOI: 10.1039/d0cc06404a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bridged bicyclic ketals display a range of bioactivities. Their catalytic enantioselective synthesis from acyclic 1,1-disubstituted alkene diols is disclosed. This reaction combines asymmetric catalysis with a distal radical migration. Alkynes and arenes undergo the group transfer.
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Affiliation(s)
- Ameya S Burde
- Chemistry Department, Natural Science Complex, State University of New York at Buffalo, Buffalo, New York 14260, USA.
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10
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Hou XQ, Lin Y, Du DM. Organocatalytic domino annulation of in situ generated tert-butyl 2-hydroxybenzylidenecarbamates with 2-isothiocyanato-1-indanones for synthesis of bridged and fused ring heterocycles. Org Chem Front 2021. [DOI: 10.1039/d1qo00626f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An asymmetric domino annulation of 2-isothiocyanato-1-indanones with tert-butyl 2-hydroxybenzylidenecarbamates was developed for the enantioselective construction of bridged and fused ring hererocycles in high yields with excellent stereoselectivities.
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Affiliation(s)
- Xi-Qiang Hou
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- People's Republic of China
| | - Ye Lin
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- People's Republic of China
| | - Da-Ming Du
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- People's Republic of China
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11
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Wang L, Zhang Z, Han H, Liu X, Bu Z, Wang Q. Recent Advances in the Construction of Bridged Rings through Cycloadditions and Cascade Reactions. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202007045] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Lai Y, Nagaraju K, Gurubrahamam R, Chen K. Enantioselective Organocatalytic Synthesis of
δ
‐Lactone‐Fused 4‐Chromanones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000667] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yu‐Ting Lai
- Department of Chemistry National Taiwan Normal University Taipei 11677 Taiwan R.O.C
| | - Koppanathi Nagaraju
- Department of Chemistry National Taiwan Normal University Taipei 11677 Taiwan R.O.C
| | - Ramani Gurubrahamam
- Department of Chemistry Indian Institute of Technology Jammu, Jagti, NH 44 Jammu (J&K) 181221 India
| | - Kwunmin Chen
- Department of Chemistry National Taiwan Normal University Taipei 11677 Taiwan R.O.C
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13
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Wu F, Wang L, Ji Y, Zou G, Shen H, Nicewicz DA, Chen J, Huang Y. Direct Synthesis of Bicyclic Acetals via Visible Light Catalysis. iScience 2020; 23:101395. [PMID: 32759056 PMCID: PMC7404572 DOI: 10.1016/j.isci.2020.101395] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/26/2020] [Accepted: 07/17/2020] [Indexed: 11/28/2022] Open
Abstract
Polysubstituted bicyclic acetals are a class of privileged pharmacophores with a unique 3D structure and an adjacent pair of hydrogen bond acceptors. The key, fused acetal functionality is often assembled, via intramolecular cyclization, from linear substrates that are not readily available. Herein, we report a formal cycloaddition between cinnamyl alcohols and cyclic enol ethers under ambient photoredox catalysis conditions. Polysubstituted bicyclic acetals can be prepared in one step from readily available building blocks. Employment of sugar-derived enol ethers allows easy access to a library of scaffolds with intriguing conformation and medicinal chemistry potential. Synergistic catalysis of photocatalyst and HAT reagent 5/5, 5/6, 5/7, 6/6 bicyclic acetals and polysubstituted THF formed in one step High stability of bicyclic acetal in SIF and SGF
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Affiliation(s)
- Fengjin Wu
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Leifeng Wang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen 518055, China; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, USA
| | - Ying Ji
- Roche R&D Center (China) Ltd, 720 Cai Lun Road, Building 5, Shanghai 201203, China
| | - Ge Zou
- Roche R&D Center (China) Ltd, 720 Cai Lun Road, Building 5, Shanghai 201203, China
| | - Hong Shen
- Roche R&D Center (China) Ltd, 720 Cai Lun Road, Building 5, Shanghai 201203, China
| | - David A Nicewicz
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen 518055, China; Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, USA.
| | - Jiean Chen
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen 518055, China; Pingshan Translational Medicine Center, Shenzhen Bay Laboratory, Shenzhen 518055, China.
| | - Yong Huang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen 518055, China; Pingshan Translational Medicine Center, Shenzhen Bay Laboratory, Shenzhen 518055, China.
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14
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Zhang J, Song M, Ao YL, Li Y, Zou XY, Xu J, Wang Y, Zhang DM, Zhang XQ, Ye WC. Alstolarines A and B, two unusual monoterpenoid indole alkaloids with an acetal moiety from Alstonia scholaris. Org Chem Front 2020. [DOI: 10.1039/d0qo00751j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two novel monoterpenoid indole alkaloids, alstolarines A and B (1 and 2), were isolated from Alstonia scholaris, and exhibited promising vasorelaxant activities.
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15
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2018. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Lenci E, Menchi G, Saldívar-Gonzalez FI, Medina-Franco JL, Trabocchi A. Bicyclic acetals: biological relevance, scaffold analysis, and applications in diversity-oriented synthesis. Org Biomol Chem 2019; 17:1037-1052. [DOI: 10.1039/c8ob02808g] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The chemoinformatics analysis of fused, spiro, and bridged bicyclic acetals is instrumental for the DOS of natural product-inspired molecular collections.
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Affiliation(s)
- Elena Lenci
- Department of Chemistry “Ugo Schiff”
- University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Gloria Menchi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- 50019 Sesto Fiorentino
- Italy
- Interdepartmental Center for Preclinical Development of Molecular Imaging (CISPIM)
| | - Fernanda I. Saldívar-Gonzalez
- School of Chemistry
- Department of Pharmacy
- Universidad Nacional Autónoma de México
- Avenida Universidad 3000
- Mexico City 04510
| | - José L. Medina-Franco
- School of Chemistry
- Department of Pharmacy
- Universidad Nacional Autónoma de México
- Avenida Universidad 3000
- Mexico City 04510
| | - Andrea Trabocchi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- 50019 Sesto Fiorentino
- Italy
- Interdepartmental Center for Preclinical Development of Molecular Imaging (CISPIM)
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