1
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Cheng WF, Ma S, Lai YT, Cheung YT, Akkarasereenon K, Zhou Y, Tong R. BiBr 3 -Mediated Intramolecular Aza-Prins Cyclization of Aza-Achmatowicz Rearrangement Products: Asymmetric Total Synthesis of Suaveoline and Sarpagine Alkaloids. Angew Chem Int Ed Engl 2023; 62:e202311671. [PMID: 37724977 DOI: 10.1002/anie.202311671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 09/21/2023]
Abstract
An intramolecular aza-Prins cyclization of aza-Achmatowicz rearrangement products was developed in which bismuth tribromide (BiBr3 ) plays a dual role as an efficient Lewis acid and source of the bromide nucleophile. This approach enables the facile construction of highly functionalized 9-azabicyclo[3.3.1]nonanes (9-ABNs), which are valuable synthetic building blocks and a powerful platform for the synthesis of a variety of alkaloid natural products and drug molecules. Suitable substrates for the aza-Prins cyclization include 1,1-disubstituted alkenes, 1,2-disubstituted alkenes, alkynes, and allenes, with good to excellent yields observed. Finally, we showcase the application of this new approach to the enantioselective total synthesis of six indole alkaloids: (-)-suaveoline (1), (-)-norsuaveoline (2), (-)-macrophylline (3), (+)-normacusine B (4), (+)-Na -methyl-16-epipericyclivine (5) and (+)-affinisine (6) in a total of 9-14 steps. This study significantly expands the synthetic utility of the aza-Achmatowicz rearrangement, and the strategy (aza-Achmatowicz/aza-Prins) is expected to be applicable to the total synthesis of other members of the big family of macroline and sarpagine indole alkaloids.
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Affiliation(s)
- Wai Fung Cheng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Shiqiang Ma
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Yin Tung Lai
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Yuen Tsz Cheung
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Kornkamon Akkarasereenon
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Yiqin Zhou
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
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2
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Hocine S, Duchamp E, Mishra A, Fourquez JM, Hanessian S. Synthesis of Aza-Bridged Perhydroazulene Chimeras of Tropanes and Hederacine A. J Org Chem 2023; 88:4675-4686. [PMID: 36940388 DOI: 10.1021/acs.joc.3c00169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Abstract
We report the synthesis of two novel azaperhydroazulene tropane-hederacine chimeras A and B, which contain an 8-azabicyclo[3.2.1]octane ring and a 7-azabicyclo[4.1.1]octane ring, respectively. The synthesis of both chimeras was achieved by epoxide ring opening and was governed by the stereochemistry of the hydroxy-epoxide unit. Finally, a density functional theory study was conducted to explain the regioselectivity of the cyclization and the importance of the stereochemistry of the hydroxyl group.
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Affiliation(s)
- Sofiane Hocine
- Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, Quebec H3C 3J7, Canada
| | - Edouard Duchamp
- Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, Quebec H3C 3J7, Canada
| | - Akash Mishra
- Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, Quebec H3C 3J7, Canada
| | | | - Stephen Hanessian
- Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, Quebec H3C 3J7, Canada
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3
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Olivier WJ, Henneveld JS, Smith JA, Hawkins BC, Bissember AC. Strategies for the synthesis of Stemona alkaloids: an update. Nat Prod Rep 2022; 39:2308-2335. [PMID: 36218078 DOI: 10.1039/d2np00058j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Covering: 2009 to 2022The Stemona alkaloids, which are found in plant species from the family Stemonaceae, represent a tremendously large and structurally-diverse family of natural products. This review presents and discusses a selection of case studies, grouped by alkaloid class, that showcase the key strategies and overall progress that has been made in the synthesis of Stemona alkaloids and related compounds since 2009. Structural reassignments that have been reported over this period are also identified where necessary.
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Affiliation(s)
- Wesley J Olivier
- School of Natural Sciences - Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia.
| | - Jackson S Henneveld
- Department of Chemistry, University of Otago, Dunedin, Otago 9054, New Zealand.
| | - Jason A Smith
- School of Natural Sciences - Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia.
| | - Bill C Hawkins
- Department of Chemistry, University of Otago, Dunedin, Otago 9054, New Zealand.
| | - Alex C Bissember
- School of Natural Sciences - Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia.
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4
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Huang SY, Gao LH, Huang XZ, Huang PQ. Enantioselective Total Syntheses of the Proposed and Revised Structures of Methoxystemofoline: A Stereochemical Revision. J Org Chem 2021; 86:11053-11071. [PMID: 33440938 DOI: 10.1021/acs.joc.0c02667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This article describes the full details of our synthetic efforts toward the enantioselective total synthesis of the complex alkaloid methoxystemofoline. The enantioselective construction of the tetracyclic core features: (1) the Keck allylation at the N-α bridgehead carbon to forge the tetrasubstituted stereocenter; (2) an olefin cross-metathesis reaction for the side-chain elongation that is amenable for the synthesis of congeners and analogues; and (3) a regioselective aldol addition reaction with methyl pyruvate that ensured the subsequent regioselective cyclization reaction to construct the fourth ring. Overman's method was employed to install the 5-(alkoxyalky1idene)-3-methyl-tetronate moiety. In the last step, a nonstereoselective reaction resulted in the formation of both the proposed structure of methoxystemofoline and its E-stereoisomer, the natural product (revised structure), in a 1:1 ratio. We suggest to rename the natural product as isomethoxystemofoline, and report for the first time the complete 1H NMR data for this natural product.
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Affiliation(s)
- Su-Yu Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Long-Hui Gao
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Xiong-Zhi Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China.,State Key Laboratory of Bioorganic and Natural Products Chemistry, 345 Lingling Road, Shanghai 200032, PR China
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5
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Enantioselective total syntheses of (+)-stemofoline and three congeners based on a biogenetic hypothesis. Nat Commun 2020; 11:5314. [PMID: 33082332 PMCID: PMC7576163 DOI: 10.1038/s41467-020-19163-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 09/29/2020] [Indexed: 12/13/2022] Open
Abstract
The powerful insecticidal and multi-drug-resistance-reversing activities displayed by the stemofoline group of alkaloids render them promising lead structures for further development as commercial agents in agriculture and medicine. However, concise, enantioselective total syntheses of stemofoline alkaloids remain a formidable challenge due to their structural complexity. We disclose herein the enantioselective total syntheses of four stemofoline alkaloids, including (+)-stemofoline, (+)-isostemofoline, (+)-stemoburkilline, and (+)-(11S,12R)-dihydrostemofoline, in just 19 steps. Our strategy relies on a biogenetic hypothesis, which postulates that stemoburkilline and dihydrostemofolines are biogenetic precursors of stemofoline and isostemofoline. Other highlights of our approach are the use of Horner–Wadsworth–Emmons reaction to connect the two segments of the molecule, an improved protocol allowing gram-scale access to the tetracyclic cage-type core, and a Cu-catalyzed direct and versatile nucleophilic alkylation reaction on an anti-Bredt iminium ion. The synthetic techniques that we developed could also be extended to the preparation of other Stemona alkaloids. Stemofoline alkaloids are promising lead structures for further development in the fields of agriculture and medicine. Here, the authors report the enantioselective total syntheses of four stemofoline alkaloids in 19 steps based on a biogenetic hypothesis.
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6
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Kaiser D, Bauer A, Lemmerer M, Maulide N. Amide activation: an emerging tool for chemoselective synthesis. Chem Soc Rev 2018; 47:7899-7925. [PMID: 30152510 DOI: 10.1039/c8cs00335a] [Citation(s) in RCA: 232] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
It is textbook knowledge that carboxamides benefit from increased stabilisation of the electrophilic carbonyl carbon when compared to other carbonyl and carboxyl derivatives. This results in a considerably reduced reactivity towards nucleophiles. Accordingly, a perception has been developed of amides as significantly less useful functional handles than their ester and acid chloride counterparts. However, a significant body of research on the selective activation of amides to achieve powerful transformations under mild conditions has emerged over the past decades. This review article aims at placing electrophilic amide activation in both a historical context and in that of natural product synthesis, highlighting the synthetic applications and the potential of this approach.
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Affiliation(s)
- Daniel Kaiser
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria.
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7
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Afewerki S, Wang JX, Liao WW, Córdova A. The Chemical Synthesis and Applications of Tropane Alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2018; 81:151-233. [PMID: 30685050 DOI: 10.1016/bs.alkal.2018.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tropanes are an important class of alkaloid natural products that are found in plants all over the world. These compounds can exhibit significant biological activity and are among the oldest known medicines. In the early 19th century, tropanes were isolated, characterized, and synthesized by notable chemical researchers. Their significant biological activities have inspired tremendous research efforts toward their synthesis and the elucidation of their pharmacological activity both in academia and in industry. In this chapter, which addresses the developments in this field since 1994, the focus is on the synthesis of these compounds, and several examples of sophisticated synthetic protocols involving both asymmetric and catalytic approaches are described. In addition, the structures of more than 100 new alkaloids are included as well as the applications and pharmacological properties of some tropane alkaloids.
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Affiliation(s)
- Samson Afewerki
- Department of Natural Sciences, Mid Sweden University, Sundsvall, Sweden; Berzelii Center EXSELENT, The Arrhenius Laboratory, Stockholm University, Stockholm, Sweden
| | - Jia-Xin Wang
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China
| | - Wei-Wei Liao
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China.
| | - Armando Córdova
- Department of Natural Sciences, Mid Sweden University, Sundsvall, Sweden; Berzelii Center EXSELENT, The Arrhenius Laboratory, Stockholm University, Stockholm, Sweden.
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8
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Henkin JM, Ren Y, Soejarto DD, Kinghorn AD. The Search for Anticancer Agents from Tropical Plants. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2018; 107:1-94. [PMID: 30178270 DOI: 10.1007/978-3-319-93506-5_1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Many of the clinically used anticancer agents in Western medicine are derived from secondary metabolites found in terrestrial microbes, marine organisms, and higher plants, with additional compounds of this type being currently in clinical trials. If plants are taken specifically, it is generally agreed that the prospects of encountering enhanced small organic-molecule chemical diversity are better if tropical rather than temperate species are investigated in drug discovery efforts. Plant collection in tropical source countries requires considerable preparation and organization to conduct in a responsible manner that abides by the provisions of the 1992 Rio Convention of Biological Diversity and the 2010 Nagoya Protocol on Access to Genetic Resources. Correct taxonomic identifications and enhanced procedures for processing and documenting plant samples when collected in often difficult terrain are required. Phytochemical aspects of the work involve solvent fractionation, known compound dereplication, preliminary in vitro testing, and prioritization, leading to "activity-guided fractionation", compound structure determination, and analog development. Further evaluation of lead compounds requires solubility, formulation, preliminary pharmacokinetics, and in vivo testing in suitable models. Covering the work of the authors carried out in two sequential multidisciplinary, multi-institutional research projects, examples of very promising compounds discovered from plants acquired from Africa, Southeast Asia, the Americas, and the Caribbean region, and with potential anticancer activity will be mentioned. These include plant secondary metabolites of the diphyllin lignan, cyclopenta[b]benzofuran, triterpenoid, and tropane alkaloid types.
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Affiliation(s)
- Joshua M Henkin
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Yulin Ren
- Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH, USA
| | - Djaja Djendoel Soejarto
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - A Douglas Kinghorn
- Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH, USA.
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9
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Huang PQ, Fan T. Intramolecular Keto Lactam Condensation: A Convenient and Straightforward Approach to Bicyclic Vinylogous Lactams. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; 300071 Tianjin P. R. China
| | - Ting Fan
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
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10
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Li Y, Li J, Ding H, Li A. Recent advances on the total synthesis of alkaloids in mainland China. Natl Sci Rev 2017. [DOI: 10.1093/nsr/nwx050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
AbstractAlkaloids are a large family of natural products that mostly contain basic nitrogen atoms. Because of their intriguing structures and important functions, they have long been popular targets for synthetic organic chemists. China's chemists have made significant progress in the area of alkaloid synthesis over past decades. In this article, selected total syntheses of alkaloids from research groups in mainland China during the period 2011–16 are highlighted.
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Affiliation(s)
- Yong Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Jian Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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11
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Annadi K, Wee AGH. An Alkylidene Carbene C–H Activation Approach toward the Enantioselective Syntheses of Spirolactams: Application to the Synthesis of (−)-Adalinine. J Org Chem 2016; 81:1021-38. [DOI: 10.1021/acs.joc.5b02582] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Krishna Annadi
- Department
of Chemistry and
Biochemistry, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
| | - Andrew G. H. Wee
- Department
of Chemistry and
Biochemistry, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
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12
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Geng H, Huang PQ. Versatile and chemoselective transformation of aliphatic and aromatic secondary amides to nitriles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.094] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Mou XQ, Xu L, Wang SH, Yang C. Copper-catalyzed dicyanation of N,N-disubstituted formamide. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.056] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Reductive Cyclization and Petasis-Like Reaction for the Synthesis of Functionalized γ-Lactams. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500143] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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Luo SP, Geng H, Wang Y, Huang PQ. Low-Valent Titanium-Mediated Enantioselective Synthesis of Quinazolinone Alkaloids Circumdatins F, H, and Analogs. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201400849] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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16
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17
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Huang PQ, Huang YH, Xiao KJ, Wang Y, Xia XE. A General Method for the One-Pot Reductive Functionalization of Secondary Amides. J Org Chem 2015; 80:2861-8. [DOI: 10.1021/jo502929x] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Pei-Qiang Huang
- Department
of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology,
Collaborative Innovation Centre of Chemistry for Energy Materials,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Ying-Hong Huang
- Department
of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology,
Collaborative Innovation Centre of Chemistry for Energy Materials,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Kai-Jiong Xiao
- Department
of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology,
Collaborative Innovation Centre of Chemistry for Energy Materials,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Yu Wang
- Department
of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology,
Collaborative Innovation Centre of Chemistry for Energy Materials,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Xiao-Er Xia
- Department
of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology,
Collaborative Innovation Centre of Chemistry for Energy Materials,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
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18
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Pereira R, Otth E, Cvengroš J. Chemo- and Stereoselective NBS-Promoted Intermolecular Oxygenation and Nitrogenation of α-C-H Bonds of Tertiary Diamines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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19
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Wang AE, Chang Z, Sun WT, Huang PQ. General and Chemoselective Bisphosphonylation of Secondary and Tertiary Amides. Org Lett 2015; 17:732-5. [DOI: 10.1021/acs.orglett.5b00004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ai-E Wang
- Department
of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology,
College of Chemistry and Chemical Engineering, and Collaborative Innovation
Centre of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Zong Chang
- Department
of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology,
College of Chemistry and Chemical Engineering, and Collaborative Innovation
Centre of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Wei-Ting Sun
- Department
of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology,
College of Chemistry and Chemical Engineering, and Collaborative Innovation
Centre of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Department
of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology,
College of Chemistry and Chemical Engineering, and Collaborative Innovation
Centre of Chemistry for Energy Materials, Xiamen University, Xiamen, Fujian 361005, P. R. China
- State
Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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20
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The first enantioselective total synthesis of (+)-preussin B and an improved synthesis of (+)-preussin by step-economical methods. Sci China Chem 2015. [DOI: 10.1007/s11426-014-5270-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Huang PQ, Lang QW, Wang AE, Zheng JF. Direct reductive coupling of secondary amides: chemoselective formation of vicinal diamines and vicinal amino alcohols. Chem Commun (Camb) 2015; 51:1096-9. [DOI: 10.1039/c4cc08330j] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first direct and chemoselective reductive homocoupling reaction of secondary amides and cross-coupling reaction of secondary amides with ketones. This method relies on the direct generation of α-amino carbon radicals from amides.
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Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Qi-Wei Lang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Ai-E Wang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Jian-Feng Zheng
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
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22
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Huang PQ, Ou W, Ye JL. Aza-Knoevenagel-type condensation of secondary amides: direct access to N-monosubstituted β,β-difunctionalized enamines. Org Chem Front 2015. [DOI: 10.1039/c5qo00191a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An efficient approach toN-monosubstituted β,β-difunctionalized enamines, a class of versatile building blocks for the synthesis of bioactive compounds, is reported.
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Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Wei Ou
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jian-Liang Ye
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
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23
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Huang PQ, Huang SY, Gao LH, Mao ZY, Chang Z, Wang AE. Enantioselective total synthesis of (+)-methoxystemofoline and (+)-isomethoxystemofoline. Chem Commun (Camb) 2015; 51:4576-8. [DOI: 10.1039/c4cc09598g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first enantioselective total synthesis of (+)-methoxystemofoline (2) and (+)-isomethoxystemofoline (3). Through this work, the structure of methoxystemofoline was revised as 2 with an 11E-stereochemistry, and its absolute configuration was established.
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Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, and Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P. R. China
| | - Su-Yu Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, and Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P. R. China
| | - Long-Hui Gao
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, and Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P. R. China
| | - Zhong-Yi Mao
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, and Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P. R. China
| | - Zong Chang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, and Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P. R. China
| | - Ai-E Wang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, and Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P. R. China
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Huang PQ, Geng H. Simple, versatile, and chemoselective reduction of secondary amides and lactams to amines with the Tf2O–NaBH4 or Cp2ZrHCl–NaBH4 system. Org Chem Front 2015. [DOI: 10.1039/c4qo00317a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convenient method for the direct reduction of secondary amides and lactams to amines is reported.
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Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Hui Geng
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
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25
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Huang PQ, Ou W, Xiao KJ, Wang AE. Tertiary amide-based Knoevenagel-type reactions: a direct, general, and chemoselective approach to enaminones. Chem Commun (Camb) 2014; 50:8761-3. [DOI: 10.1039/c4cc03826f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Deng HQ, Qian XY, Li YX, Zheng JF, Xie L, Huang PQ. A versatile two-step method for the reductive alkylation and formal [4 + 2] annulation of secondary lactams: step economical syntheses of the ant venom alkaloids (2R,5S)-2-butyl-5-propylpyrrolidine and (+)-monomorine I. Org Chem Front 2014. [DOI: 10.1039/c3qo00065f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Peng QL, Luo SP, Xia XE, Liu LX, Huang PQ. The four-step total synthesis of (−)-chaetominine. Chem Commun (Camb) 2014; 50:1986-8. [DOI: 10.1039/c3cc48833k] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Mao Z, Huang S, Gao L, Wang A, Huang P. A novel and versatile method for the enantioselective syntheses of tropane alkaloids. Sci China Chem 2013. [DOI: 10.1007/s11426-013-4998-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Wang XG, Wang AE, Hao Y, Ruan YP, Huang PQ. Modular enantioselective synthesis of 8-aza-prostaglandin E1. J Org Chem 2013; 78:9488-93. [PMID: 23957245 DOI: 10.1021/jo401412g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report herein for the first time the enantioselective synthesis of 8-aza-PGE1. The synthesis used the cross olefin metathesis reaction to connect the 5-vinyl-γ-lactam subunit, prepared from (R)-malic acid via the Ley's sulfone-based α-amidalkylation protocol (dr = 6.8:1), with the chiral pre-ω-chain. The latter was synthesized in high enantioselectivity from (E)-2-octenol by the Sharpless asymmetric epoxidation and the titanocene-mediated epoxide opening. This modular approach is quite concise and flexible, and requires only eight steps from commercially available reagents.
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Affiliation(s)
- Xiao-Gang Wang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
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