1
|
Liu L, Jiang M, Zhang Q, Chen H, Zhang Y, Zhang J. Asymmetric total synthesis strategies of halichlorine and pinnaic acid. RSC Adv 2023; 13:33754-33769. [PMID: 38019985 PMCID: PMC10654894 DOI: 10.1039/d3ra06955a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 11/09/2023] [Indexed: 12/01/2023] Open
Abstract
Halichlorine and pinnaic acid are structurally related natural alkaloids isolated from different marine organisms. These two marine alkaloids bearing a 6-azaspiro[4.5]decane skeleton demonstrate a wide range of biological effects. It is this kind of unique structure and potentially valuable biological activity that have prompted strong synthetic interest, making it a research focus in recent years. Since the first total synthesis of halichlorine and pinnaic acid completed by Danishefsky's group, many groups have reported their outstanding synthesis methods especially the asymmetric synthesis strategies. This review summarizes the asymmetric synthesis strategies of halichlorine and pinnaic acid using a 6-azaspiro[4.5]decane skeleton as the key intermediate, which can provide some guidance for related work.
Collapse
Affiliation(s)
- Lu Liu
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Minghua Jiang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Qingkang Zhang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Hong Chen
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
| | - Yifu Zhang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
- Northwest Collaborative Innovation Center for Traditional Chinese Medicine Co-Constructed by Gansu Province & MOE of PRC Lanzhou 730000 P. R. China
| | - Jian Zhang
- School of Pharmacy, Gansu University of Chinese Medicine Lanzhou 730000 P. R. China
- Northwest Collaborative Innovation Center for Traditional Chinese Medicine Co-Constructed by Gansu Province & MOE of PRC Lanzhou 730000 P. R. China
- Key Laboratory of Chemistry and Quality for TCM of the College of Gansu Province Lanzhou 730000 P. R. China
| |
Collapse
|
2
|
Heravi MM, Abedian‐Dehaghani N, Zadsirjan V, Rangraz Y. Catalytic Function of Cu (I) and Cu (II) in Total Synthesis of Alkaloids. ChemistrySelect 2021. [DOI: 10.1002/slct.202101130] [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)
- Majid M. Heravi
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Neda Abedian‐Dehaghani
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Vahideh Zadsirjan
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Yalda Rangraz
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| |
Collapse
|
3
|
Hayashi Y, Odoh AS, Kranidiotis‐Hisatomi N. Asymmetric Michael Reaction of Aldehydes and α‐Cyano α,β‐Unsaturated Esters Catalyzed by Diphenylprolinol Silyl Ether; a Facile Asymmetric Route to 3,4,5‐Trisubstituted Piperidines. ChemCatChem 2020. [DOI: 10.1002/cctc.202000113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yujiro Hayashi
- Department of Chemistry Graduate School of Science Tohoku University 6-3 Aza-Aoba Aramaki Aoba-ku, Sendai 980-8578 Japan
| | - Amaechi Shedrack Odoh
- Department of Chemistry Graduate School of Science Tohoku University 6-3 Aza-Aoba Aramaki Aoba-ku, Sendai 980-8578 Japan
| | - Nektarios Kranidiotis‐Hisatomi
- Department of Chemistry Graduate School of Science Tohoku University 6-3 Aza-Aoba Aramaki Aoba-ku, Sendai 980-8578 Japan
| |
Collapse
|
4
|
Li F, Wang X, Liu YM, Zhang J, Yang J. Synthesis of 3,4,5-trisubstituted piperidine via SN2’ reaction. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1682612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Fei Li
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, Key laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, China
| | - Xue Wang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, Key laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, China
| | - Yue Meng Liu
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, Key laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, China
| | - Jing Zhang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, Key laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, China
| | - Jun Yang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, Key laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, China
| |
Collapse
|
5
|
Yamashita Y, Sato I, Suzuki H, Kobayashi S. Catalytic Asymmetric 1,4-Addition Reactions of Simple Alkylnitriles. Chem Asian J 2015; 10:2143-6. [DOI: 10.1002/asia.201500405] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Yasuhiro Yamashita
- Department of Chemistry, School of Science; The University of Tokyo; Hongo, Bunkyo-ku, Tokyo Japan
| | - Io Sato
- Department of Chemistry, School of Science; The University of Tokyo; Hongo, Bunkyo-ku, Tokyo Japan
| | - Hirotsugu Suzuki
- Department of Chemistry, School of Science; The University of Tokyo; Hongo, Bunkyo-ku, Tokyo Japan
| | - Shū Kobayashi
- Department of Chemistry, School of Science; The University of Tokyo; Hongo, Bunkyo-ku, Tokyo Japan
| |
Collapse
|
6
|
Amat M, Pérez M, Bosch J. Stereoselective Conjugate Addition Reactions to Phenylglycinol‐Derived, Unsaturated Oxazolopiperidone Lactams. Chemistry 2011; 17:7724-32. [DOI: 10.1002/chem.201100471] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy and Insitute of Biomedicine (IBUB), University of Barcelona, Av. Joan XXIII, s/n, 08028 Barcelona (Spain), Fax: (+34)934024539
| | - Maria Pérez
- Laboratory of Organic Chemistry, Faculty of Pharmacy and Insitute of Biomedicine (IBUB), University of Barcelona, Av. Joan XXIII, s/n, 08028 Barcelona (Spain), Fax: (+34)934024539
| | - Joan Bosch
- Laboratory of Organic Chemistry, Faculty of Pharmacy and Insitute of Biomedicine (IBUB), University of Barcelona, Av. Joan XXIII, s/n, 08028 Barcelona (Spain), Fax: (+34)934024539
| |
Collapse
|
7
|
Chen JP, Ding CH, Liu W, Hou XL, Dai LX. Palladium-catalyzed regio-, diastereo-, and enantioselective allylic alkylation of acylsilanes with monosubstituted allyl substrates. J Am Chem Soc 2011; 132:15493-5. [PMID: 20945898 DOI: 10.1021/ja106703y] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acylsilanes as a new type of "hard" carbon prenucleophile reacted with monosubstituted allyl reagents under Pd-catalyzed asymmetric allylic alkylation reaction conditions to provide products with high regio-, diastereo-, and enantioselectivities. The usefulness of the protocol has been demonstrated by the ready conversion of the allylated products into the corresponding alcohols, esters, and ketones with retention of stereochemistry as well as by the enantioselective synthesis of cis-3-ethyl-4-phenylpiperidine and cinnamomumolide.
Collapse
Affiliation(s)
- Jian-Ping Chen
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | | | | | | | | |
Collapse
|
8
|
Amat M, Checa B, Llor N, Pérez M, Bosch J. Conjugate Addition of 2-Acetylindole Enolates to Unsaturated Oxazolopiperidone Lactams: Enantioselective Access to the Tetracyclic Ring System of Ervitsine. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
9
|
Liu D, Acharya HP, Yu M, Wang J, Yeh VSC, Kang S, Chiruta C, Jachak SM, Clive DLJ. Total synthesis of the marine alkaloid halichlorine: development and use of a general route to chiral piperidines. J Org Chem 2009; 74:7417-28. [PMID: 19739615 DOI: 10.1021/jo901481n] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total synthesis of the marine alkaloid halichlorine is described, based on an approach that involves constructing the fully substituted asymmetric center at an early stage. The five-membered ring is formed by 5-exo-trig radical cyclization and the unsaturated six-membered ring by a process that formally represents a sequential combination of conjugate addition and S(N)2' displacement-a method that is general for making bicyclic compounds with nitrogen at a ring fusion position. A formal synthesis of (+)-halichlorine is also reported, based on the development of a general method for preparing optically pure piperidines. The key step of this method, which was used to make one of our intermediates, is the Claisen rearrangement of a 4-vinyloxy-3,4-dihydro-2H-pyridine-1-carboxylic acid benzyl ester. Such O-vinyl compounds are easily generated in situ from the corresponding alcohols, which are themselves readily assembled from serine and terminal acetylenes.
Collapse
Affiliation(s)
- Dazhan Liu
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Amat M, Llor N, Checa B, Molins E, Bosch J. A Synthetic Approach to Ervatamine-Silicine Alkaloids. Enantioselective Total Synthesis of (−)-16-Episilicine. J Org Chem 2009; 75:178-89. [DOI: 10.1021/jo902346j] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Núria Llor
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Begoña Checa
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Elies Molins
- Institut de Ciència de Materials de Barcelona (CSIC), Campus UAB, 08193 Cerdanyola, Spain
| | - Joan Bosch
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| |
Collapse
|
11
|
Amat M, Brunaccini E, Checa B, Pérez M, Llor N, Bosch J. An Unexpected Oxidation in the Generation of Cyclopenta[c]piperidines by Ring-Closing Metathesis. Org Lett 2009; 11:4370-3. [DOI: 10.1021/ol901704f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Elisa Brunaccini
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Begoña Checa
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Maria Pérez
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Núria Llor
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Joan Bosch
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| |
Collapse
|
12
|
Amat M, Pérez M, Minaglia AT, Bosch J. An Enantioselective Synthetic Route to cis-2,4-Disubstituted and 2,4-Bridged Piperidines. J Org Chem 2008; 73:6920-3. [DOI: 10.1021/jo801172b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Maria Pérez
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Annamaria T. Minaglia
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| | - Joan Bosch
- Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona, 08028 Barcelona, Spain
| |
Collapse
|
13
|
Enantioselective synthesis of 2-[(3-ethyl-4-piperidyl)methyl]indoles from a phenylglycinol-derived lactam: formal synthesis of Strychnos alkaloids. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.07.079] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
14
|
Amat M, Pérez M, Minaglia AT, Peretto B, Bosch J. A general synthetic route to enantiopure cis-fused perhydrocycloalka[c]pyridines from phenylglycinol-derived lactams. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.01.072] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
15
|
Escolano C, Amat M, Bosch J. Chiral Oxazolopiperidone Lactams: Versatile Intermediates for the Enantioselective Synthesis of Piperidine-Containing Natural Products. Chemistry 2006; 12:8198-207. [PMID: 16991186 DOI: 10.1002/chem.200600813] [Citation(s) in RCA: 173] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Phenylglycinol-derived oxazolopiperidone lactams are exceptionally versatile building blocks for the enantioselective construction of structurally diverse piperidine-containing natural products and bioactive compounds. These lactams are readily available in both enantiomeric series by cyclocondensation of the chiral amino alcohol with a delta-oxo acid derivative and allow the substituents to be introduced at the different ring positions in a regio- and stereocontrolled manner, providing access to enantiopure polysubstituted piperidines bearing virtually any type of substitution pattern, and also quinolizidines, indolizidines, perhydroquinolines, hydroisoquinolines, as well as complex indole alkaloids. Of particular interest are cyclocondensation reactions with racemic or prochiral delta-oxo (di)acid derivatives in processes involving dynamic kinetic resolution and/or differentiation of enantiotopic or diastereotopic ester groups, as they directly lead to lactams that already incorporate the carbon substituents on the heterocyclic ring. The use of (S)-3,4-dimethoxyphenylalaninol or (S)-tryptophanol in the above cyclocondensation reactions expands the potential and the scope of the methodology, providing a straightforward route to enantiopure benzo[a]- and indolo[2,3-a]quinolizidines.
Collapse
Affiliation(s)
- Carmen Escolano
- Laboratory of Organic Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain
| | | | | |
Collapse
|
16
|
Amat M, Bassas O, Llor N, Cantó M, Pérez M, Molins E, Bosch J. Dynamic Kinetic Resolution and Desymmetrization Processes: A Straightforward Methodology for the Enantioselective Synthesis of Piperidines. Chemistry 2006; 12:7872-81. [PMID: 16850515 DOI: 10.1002/chem.200600420] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A straightforward procedure for the synthesis of enantiopure polysubstituted piperidines is reported. It involves the direct generation of chiral non-racemic oxazolo[3,2-a]piperidone lactams that already incorporate carbon substituents on the heterocyclic ring and the subsequent removal of the chiral auxiliary. The key step is a cyclocondensation reaction of (R)-phenylglycinol or other amino alcohols with racemic or prochiral delta-oxo (di)acid derivatives in highly stereoselective processes involving dynamic kinetic resolution and/or desymmetrization of diastereotopic or enantiotopic ester groups.
Collapse
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain.
| | | | | | | | | | | | | |
Collapse
|
17
|
Deiters A, Pettersson M, Martin SF. General Strategy for the Syntheses of Corynanthe, Tacaman, and Oxindole Alkaloids. J Org Chem 2006; 71:6547-61. [PMID: 16901143 DOI: 10.1021/jo061032t] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report herein the total synthesis of the corynanthe alkaloid dihydrocorynantheol and the formal syntheses of the indole alkaloids tacamonine, rhynchophylline, and hirsutine. The strategies for assembling the corynanthe and tacaman skeletal frameworks comprised of both the classical ABD --> ABCD and ABC --> ABCD approaches wherein the variously substituted piperidinone D-rings were formed via ring-closing metathesis (RCM) followed by a 1,4-addition to introduce the requisite side chain at C(15). Since 1,4-additions to alpha,beta-unsaturated lactams represent an underdeveloped field, we conducted a series of studies with two unsaturated lactams employing organocuprates and metal enolates as the nucleophiles. These studies revealed that organocuprates derived from Grignard reagents and either stoichiometric amounts of CuCN or catalytic amounts of CuBr.DMS complex are excellent nucleophiles for such additions; TMSCl was a crucial additive for optimizing these reactions. The anion derived from ethyl 1,3-dithiolane-2-carboxylate was also an excellent nucleophile in these 1,4-additions, although the stereochemistry of such 1,4-additions to carboline-derived, unsaturated lactams was sensitive to substitution on the indole nitrogen atom. The ABD --> ABCD approach to these alkaloids featured a novel one-pot sequence of an RCM reaction and a zirconocene-catalyzed carbomagnesation followed by a second RCM to generate the D-ring.
Collapse
Affiliation(s)
- Alexander Deiters
- Department of Chemistry and Biochemistry, University of Texas, Austin, Texas 78712, USA
| | | | | |
Collapse
|
18
|
Amat M, Escolano C, Lozano O, Gómez-Esqué A, Griera R, Molins E, Bosch J. Alkylation of Phenylglycinol-Derived Oxazolopiperidone Lactams. Enantioselective Synthesis of β-Substituted Piperidines. J Org Chem 2006; 71:3804-15. [PMID: 16674053 DOI: 10.1021/jo060157v] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The stereochemical outcome of the alkylation of a variety of phenylglycinol-derived oxazolopiperidone lactams is studied. The influence of the configuration of the C-8a stereocenter and the effect of the substituents at the C-8 and C-8a positions on the stereoselectivity of the reaction are discussed. The synthetic utility of these alkylation reactions is illustrated with the synthesis of cis and trans 3,5-disubstituted, 2,5-disubstituted, and 2,3,5-trisubstituted enantiopure piperidines, and the indole alkaloids 20R- and 20S-dihydrocleavamine.
Collapse
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy, University of Barcelona, 08028-Barcelona, Spain.
| | | | | | | | | | | | | |
Collapse
|
19
|
Exceptional reactivity and selectivity of lower-order cyanocuprates in the SN2′-substitution of propargyl acetates. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.06.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
20
|
Herdeis C, Küpper P, Plé S. An expeditious stereoselective synthesis of natural (−)-Cassine via cascade HWE [3 + 2]-cycloaddition process. Org Biomol Chem 2006; 4:524-9. [PMID: 16446811 DOI: 10.1039/b516888k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
l-Rhamnose is transformed to (-)-Cassine via a remarkable four step one pot reaction. The Horner-Wadsworth-Emmons [3 + 2]-1,3-dipolar cycloaddition reaction cascade is the pivotal step in this reaction sequence and makes the synthesis highly efficient.
Collapse
Affiliation(s)
- Claus Herdeis
- Institut für Pharmazie und Lebensmittelchemie der Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
| | | | | |
Collapse
|
21
|
Amat M, Pérez M, Llor N, Escolano C, Luque FJ, Molins E, Bosch J. Conjugate Additions to Phenylglycinol-Derived Unsaturated δ-Lactams. Enantioselective Synthesis of Uleine Alkaloids. J Org Chem 2004; 69:8681-93. [PMID: 15575744 DOI: 10.1021/jo0487101] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The stereochemical outcome of the conjugate addition of a variety of stabilized nucleophiles (2-indoleacetic enolates and sulfur-stabilized anions) to the phenylglycinol-derived unsaturated lactams trans-2, cis-2, and its 8-ethyl-substituted analogue 10 is studied. The factors governing the exo or endo facial stereoselectivity are discussed. This methodology provides short synthetic routes to either cis- or trans-3,4-disubstituted enantiopure piperidines as well as efficient routes for the enantioselective construction of the tetracyclic ring system of uleine alkaloids, both in the normal and 20-epi series. The formal total synthesis of several alkaloids of this group is reported.
Collapse
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry and Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, 08028 Barcelona, Spain.
| | | | | | | | | | | | | |
Collapse
|
22
|
Concise synthesis of trans- and cis-3,4-disubstituted piperidines based on regio- and stereoselective allylation of cyclopentenyl esters. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.08.174] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
23
|
Agami C, Dechoux L, Hebbe S, Ménard C. Enantioselective synthesis of indolizidine and quinolizidine derivatives from chiral non-racemic bicyclic lactams. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.04.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
24
|
Brewster AG, Broady S, Davies CE, Heightman TD, Hermitage SA, Hughes M, Moloney MG, Woods G. Enantiopure bicyclic piperidinones: stereoselectivity in lactam enolate alkylations. Org Biomol Chem 2004; 2:1031-43. [PMID: 15034627 DOI: 10.1039/b316037h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and alkylation of [4.3.0]-bicyclic lactams, derived from 6-oxopipecolic acid, have been investigated. Alkylation can proceed with predominantly exo-diastereoselectivity, but the efficiency of this process depends on the substitution at the hemiaminal ether system. These products can be readily deprotected to give substituted hydroxymethyl lactams in good yield.
Collapse
|
25
|
Amat M, Pérez M, Llor N, Martinelli M, Molins E, Bosch J. Enantioselective formal synthesis of uleine alkaloids from phenylglycinol-derived bicyclic lactams. Chem Commun (Camb) 2004:1602-3. [PMID: 15263938 DOI: 10.1039/b400987h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A two-step route for the enantioselective construction of the tetracyclic ring system of uleine alkaloids, involving the stereoselective conjugate addition of an appropriate indole-containing nucleophile to a chiral bicyclic delta-lactam and the subsequent cyclization on the indole 3-position of the resulting 4,5-disubstituted 2-piperidone, has culminated in the formal total synthesis of several alkaloids of this group.
Collapse
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy, University of Barcelona, 08028-Barcelona, Spain.
| | | | | | | | | | | |
Collapse
|
26
|
Casamitjana N, Amat M, Llor N, Carreras M, Pujol X, Montserrat Fernández M, López V, Molins E, Miravitlles C, Bosch J. Diels–Alder reactions of phenylglycinol-derived bicyclic lactams. Enantiodivergent synthesis of cis-hydroisoquinolines. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0957-4166(03)00368-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
27
|
|
28
|
Weintraub PM, Sabol JS, Kane JM, Borcherding DR. Recent advances in the synthesis of piperidones and piperidines. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00295-3] [Citation(s) in RCA: 320] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
29
|
On the configuration of (3R,8aS)-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0957-4166(02)00837-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
30
|
Abstract
[reaction: see text] A stereoselective synthesis of the indole alkaloid dihydrocorynantheol (1) from indole-3-acetic acid has been achieved by a sequence involving 9 as a key intermediate. The synthesis of the unsaturated lactam ring in 9 highlights a series of catalytic organometallic reactions featuring two ring-closing metatheses and a zirconocene-catalyzed carbomagnesation. Since no protecting groups were used, the present synthesis of 1 is exceedingly concise, consisting of only eight distinct operations.
Collapse
Affiliation(s)
- Alexander Deiters
- Department of Chemistry and Biochemistry, The University of Texas, Austin 78712, USA
| | | |
Collapse
|
31
|
Amat M, Pérez M, Llor N, Bosch J. Stereodivergent synthesis of enantiopure cis- and trans-3-Ethyl-4-piperidineacetates. Org Lett 2002; 4:2787-90. [PMID: 12153235 DOI: 10.1021/ol0263245] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Starting from a common chiral bicyclic lactam 11, enantiopure trans- or cis-3-ethyl-4-piperidineacetate derivatives are obtained by conjugate addition of an enolate or a cuprate to the unsaturated lactams 12 or 18, respectively.
Collapse
Affiliation(s)
- Mercedes Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy, University of Barcelona, Spain.
| | | | | | | |
Collapse
|
32
|
Amat M, Cantó M, Llor N, Ponzo V, Pérez M, Bosch J. Dynamic Kinetic Resolution and Desymmetrization of Enantiotopic Groups by Cyclodehydration of Racemic or Prochiralδ-Oxoesters with (R)-Phenylglycinol: Enantioselective Synthesis of Piperidines. Angew Chem Int Ed Engl 2002. [DOI: 10.1002/1521-3757(20020118)114:2<345::aid-ange345>3.0.co;2-i] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
33
|
Bennasar ML, Juan C, Roca T, Monerris M, Bosch J. Generation and reactions of 1-(2-indolyl)vinylcopper derivatives with pyridinium salts. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)01065-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
34
|
Amat M, Llor N, Huguet M, Molins E, Espinosa E, Bosch J. Unprecedented oxidation of a phenylglycinol-derived 2-pyridone: enantioselective synthesis of polyhydroxypiperidines. Org Lett 2001; 3:3257-60. [PMID: 11594808 DOI: 10.1021/ol016418z] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text]. The phenylglycinol-derived 2-pyridone 1 undergoes m-CPBA oxidation steroselectively leading to the chiral nonracemic unsaturated bicyclic hydroxylactam 2, from which the enantioselective synthesis of (3R,5R)-3,4,5-trihydroxypiperidine (16) and the formal synthesis of the azasugar epiisofagomine are described. The enantioselective synthesis of (S)-N-Boc-3-hydroxypiperidine and (3R,4S)-3,4-dihydroxypiperidine is also reported.
Collapse
Affiliation(s)
- M Amat
- Laboratory of Organic Chemistry, Faculty of Pharmacy, University of Barcelona, 08028-Barcelona, Spain.
| | | | | | | | | | | |
Collapse
|