1
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Bethi V, Tanaka F. Organocatalytic Enantioselective γ-Position-Selective Mannich Reactions of β-Ketocarbonyl Derivatives. Org Lett 2022; 24:6711-6715. [PMID: 36096488 PMCID: PMC9513800 DOI: 10.1021/acs.orglett.2c02433] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Catalytic asymmetric Mannich reactions of β-ketocarbonyl
derivatives (such as β-ketoesters and (2-oxopropyl)phosphonate),
resulting in the formation of a C–C bond at the γ-position
of the β-ketocarbonyl derivatives with high enantioselectivities,
are reported. The bond formation at the α-position of the β-ketoester
was reversible, and the γ-position-reacted product δ-amino
β-ketoester derivative was kinetically formed and was stable.
The dynamic kinetic process was key for the direct access to the γ-position-reacted
products from β-ketocarbonyls under catalytic conditions.
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Affiliation(s)
- Venkati Bethi
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
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2
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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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3
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Philip RM, Treesa GSS, Saranya S, Anilkumar G. Applications of aryl-sulfinamides in the synthesis of N-heterocycles. RSC Adv 2021; 11:20591-20600. [PMID: 35479913 PMCID: PMC9033961 DOI: 10.1039/d1ra04099e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 06/01/2021] [Indexed: 11/21/2022] Open
Abstract
Enantiopure aryl-sulfinamides are important chiral auxiliaries in the asymmetric synthesis of amines and their derivatives. Here, we provide an overview of arylsulfinamide mediated asymmetric methods towards N-heterocycle synthesis. This methodology through sulfinylimines offers general access to structurally diverse piperidines, pyrrolidines, aziridines and their derivatives which represent the structural motif of many natural products and therapeutically important compounds. The review covers articles from 2006–2020 and we have categorized the review based on the ring size as 3-, 5-, and 6- membered heterocycles and their derivatives. The review comprehends the usage of arylsulfinamides for the construction of diverse N-heterocycles like piperidines, pyrrolidines, aziridines, and their fused derivatives.![]()
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Affiliation(s)
- Rose Mary Philip
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India (+91) 481-2731036
| | - G S Susan Treesa
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India (+91) 481-2731036
| | - Salim Saranya
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India (+91) 481-2731036
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India (+91) 481-2731036.,Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India.,Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India
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4
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Gao F, Tao D, Ju C, Yang BB, Bao XQ, Zhang D, Zhang TT, Li L. Regioselectivity of aminomethylation in 3-acetyl-7-hydroxycoumarins: Mannich bases and Betti bases. NEW J CHEM 2021. [DOI: 10.1039/d1nj01584b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The atomic electron density distribution in 3-acetyl-7-hydroxycoumarin was analysed to elucidate the regioselectivity of aminomethylation.
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Affiliation(s)
- Fan Gao
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
| | - Deng Tao
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
| | - Cheng Ju
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
| | - Bei-Bei Yang
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
| | - Xiu-Qi Bao
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
| | - Dan Zhang
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
| | - Tian-Tai Zhang
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
| | - Li Li
- Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100050
- China
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5
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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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6
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Jo H, Hassan AHE, Jung SY, Lee JK, Cho YS, Min SJ. Construction of 8-Azabicyclo[3.2.1]octanes via Sequential DDQ-Mediated Oxidative Mannich Reactions of N-Aryl Pyrrolidines. Org Lett 2018; 20:1175-1178. [DOI: 10.1021/acs.orglett.8b00098] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hanbyeol Jo
- Department of Chemical & Molecular Engineering/Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Ahmed H. E. Hassan
- Department
of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Seung Young Jung
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Department
of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Jae Kyun Lee
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Yong Seo Cho
- Center
for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Sun-Joon Min
- Department of Chemical & Molecular Engineering/Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
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7
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Li G, Xu X, Tian H, Liu X, Chen W, Yang X, Zhang H. Asymmetric synthesis of δ-amino acid derivatives via diastereoselective vinylogous Mannich reactions between N-tert-butanesulfinyl imines and dioxinone-derived lithium dienolate. RSC Adv 2017. [DOI: 10.1039/c7ra10529k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A diastereoselective vinylogous Mannich reaction between theN-tert-butanesulfinyl imines and dioxinone-derived lithium dienolate was developed.
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Affiliation(s)
- Guijun Li
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Xiaoliang Xu
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Hongchang Tian
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Xiaotong Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Wen Chen
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
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8
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Davis FA. Heterocyclic synthesis using the intramolecular Mannich cyclization reaction and enantiopureN-sulfinyl β-amino carbonyl compounds. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2015.1065260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Gunes Y, Arcelik N, Sahin E, Fleming FF, Altundas R. Enantioselective Installation of Quaternary Centers in Cyclic Oxonitriles. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500895] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Wang Q, van Gemmeren M, List B. Asymmetrische Disulfonimid-katalysierte Synthese von δ-Amino-β-ketoestern durch vinyloge Mukaiyama-Mannich-Reaktionen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407532] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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Wang Q, van Gemmeren M, List B. Asymmetric disulfonimide-catalyzed synthesis of δ-amino-β-ketoester derivatives by vinylogous Mukaiyama-Mannich reactions. Angew Chem Int Ed Engl 2014; 53:13592-5. [PMID: 25348924 DOI: 10.1002/anie.201407532] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Indexed: 11/08/2022]
Abstract
An organocatalytic asymmetric synthesis of δ-amino-β-ketoester derivatives has been developed. A chiral disulfonimide (DSI) serves as a highly efficient precatalyst for a vinylogous Mukaiyama-Mannich reaction of readily available dioxinone-derived silyloxydienes with N-Boc-protected imines, delivering products in excellent yields and enantioselectivities. The synthetic utility of this reaction is illustrated in various transformations, including a new CC bond-forming reaction, which provide useful enantioenriched building blocks. The methodology is applied in a formal synthesis of (-)-lasubin.
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Affiliation(s)
- Qinggang Wang
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr (Germany)
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12
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Davies SG, Fletcher AM, Thomson JE. Direct asymmetric syntheses of chiral aldehydes and ketones via N-acyl chiral auxiliary derivatives including chiral Weinreb amide equivalents. Chem Commun (Camb) 2014; 49:8586-98. [PMID: 23959006 DOI: 10.1039/c3cc45463k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This article covers N-acyl chiral auxiliary-based approaches to the asymmetric synthesis of enantiopure aldehydes and ketones. The use of diastereoisomerically pure N-acyl derivatives of chiral auxiliaries (including chiral Weinreb amide equivalents) and their conversion to the corresponding enantiopure aldehydes and ketones in a single synthetic operation by treatment with a hydride reducing agent or an organometallic reagent, respectively, are highlighted.
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Affiliation(s)
- Stephen G Davies
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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13
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Bhat C, Tilve SG. Recent advances in the synthesis of naturally occurring pyrrolidines, pyrrolizidines and indolizidine alkaloids using proline as a unique chiral synthon. RSC Adv 2014. [DOI: 10.1039/c3ra44193h] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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Rajasekar M, Das TM. One-pot synthesis of fluorescein based β-aminoglycosylketones and their biological and material applications. RSC Adv 2014. [DOI: 10.1039/c4ra06569g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Facile one-pot synthesis of fluorescein based β-aminoglycosylketones was carried out using 4,6-O-protected-C-glycoside, fluorescein-monoaldehyde and aromatic amines in the presence of potassium carbonate as a catalyst.
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Affiliation(s)
- Mani Rajasekar
- Department of Organic Chemistry
- University of Madras
- Chennai – 600 025, India
| | - Thangamuthu Mohan Das
- Department of Organic Chemistry
- University of Madras
- Chennai – 600 025, India
- Department of Chemistry
- School of Basic and Applied Sciences
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15
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Hodgson DM, Charlton A, Paton RS, Thompson AL. C-Alkylation of Chiral Tropane- and Homotropane-Derived Enamines. J Org Chem 2013; 78:1508-18. [DOI: 10.1021/jo3025972] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David M. Hodgson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA,
U.K
| | - Andrew Charlton
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA,
U.K
| | - Robert S. Paton
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA,
U.K
| | - Amber L. Thompson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA,
U.K
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16
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Asymmetric synthesis of β-aryl-β-trifluoromethyl-β-aminoarones via Mannich-type reactions of ketone enolates with chiral aryl CF3-substituted N-tert-butanesulfinyl ketimines. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.04.070] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Edupuganti R, Davis FA. Synthesis and applications of masked oxo-sulfinamides in asymmetric synthesis. Org Biomol Chem 2012; 10:5021-31. [PMID: 22576951 DOI: 10.1039/c2ob25345c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This short perspective reports on the synthesis and applications of a class of chiral amino carbonyl compounds, masked oxo-sulfinamides where the amine is protected with an N-sulfinyl moiety and the carbonyl group is protected as the ketal or 1,3-dithiane. These polyfunctionalized chiral building blocks are prepared by addition of organometallic reagents to masked oxo-sulfinimines (N-sulfinyl imines) or the addition of oxo-organometallic reagents and lithio-1,3-dithianes to sulfinimines. Because unmasking of the amino and carbonyl groups results in cyclic imines, these chiral building blocks are particularly useful for the asymmetric synthesis of functionalized nitrogen heterocycles, including prolines, pipecolic acids, pyrrolidines, homotropinones, tropinones, and tropane alkaloids such as cocaine and C-1 cocaine analogues.
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18
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Davis FA, Gaddiraju NV, Theddu N, Hummel JR, Kondaveeti SK, Zdilla MJ. Enantioselective synthesis of cocaine C-1 analogues using sulfinimines (N-sulfinyl imines). J Org Chem 2012; 77:2345-59. [PMID: 22300308 DOI: 10.1021/jo202652f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first examples of cocaine analogues having substituents (methyl, ethyl, n-propyl, n-pentyl, and phenyl) at the C-1 position of the cocaine tropane skeleton were prepared by heating sulfinimine-derived α,β-unsaturated pyrrolidine nitrones. In the presence of the Lewis acid Al(O(t)Bu)(3) the nitrones undergo an intramolecular [3 + 2] cycloaddition to give tricyclic isoxazolidines that were transformed in three steps to the cocaine analogues. In the absence of the Lewis acid, lactams were formed resulting from rearrangement of the nitrone to an oxaziridine. A novel Pd- and base-promoted rearrangement of methanesulfonate salts of isoxazolidine to bridge bicyclic[4.2.1]isoxazolidines was discovered.
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Affiliation(s)
- Franklin A Davis
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA.
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19
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Bhat C, Tilve SG. Synthesis of (−)-hygrine, (−)-norhygrine, (−)-pseudohygroline and (−)-hygroline via Nef reaction. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.09.118] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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20
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Lin P, Song B, Bhadury PS, Hu D, Zhang Y, Jin L, Yang S. Chiral Cinchona Alkaloid-Thiourea Catalyzed Mannich Reaction for Enantioselective Synthesis of β-Amino Ketones Bearing Benzothiazol Moiety. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201180413] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Neochoritis CG, Stephanidou-Stephanatou J, Tsoleridis CA. One-Pot Regioselective Double-Mannich Annulations Affording Azabicyclononanones as a Key Step in the Synthesis of Natural Products. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100700] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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23
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Davis FA, Zhang J, Wu Y. Total syntheses of (+)-monomorine I and (−)-indolizidine 195B from sulfinimine-derived 3-oxo pyrrolidine 2-phosphonates. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.10.076] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Davis FA, Xu P. Asymmetric synthesis of anti-α-substituted β-amino ketones from sulfinimines. J Org Chem 2011; 76:3329-37. [PMID: 21417438 DOI: 10.1021/jo2002352] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Previously unknown, enantiopure, β-amino ketones were prepared in modest yield by addition of lithium reagents to N-sulfinyl anti-α-substituted β-amino Weinreb amides. Grignard reagents failed to add to these Weinreb amides in contrast to the syn-α-substituted isomers which did. The anti-α-substituted β-amino Weinreb amides were prepared by addition of LiN(OMe)Me to the corresponding N-sulfinyl anti-α-substituted β-amino esters because α-alkylation of N-sulfinyl β-amino Weinreb amide enolates resulted in poor diastereoselectivities.
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Affiliation(s)
- Franklin A Davis
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA.
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25
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Mei H, Xiong Y, Han J, Pan Y. A facile process for the asymmetric synthesis of β-trifluoromethylated β-amino ketones via addition of ketone enolates to sulfinylimine. Org Biomol Chem 2011; 9:1402-6. [PMID: 21210033 DOI: 10.1039/c0ob00586j] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient method for the asymmetric synthesis of β-trifluoromethylated β-amino ketones via addition of ketone-derivative enolates to trifluoromethylated sulfinylimine has been developed, with good chemical yields and excellent diastereoselectivities. This practical method was also proved to be suitable for large-scale preparation.
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Affiliation(s)
- Haibo Mei
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
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26
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Davis FA, Theddu N. Asymmetric synthesis of cyclic cis-beta-amino acid derivatives using sulfinimines and prochiral Weinreb amide enolates. J Org Chem 2010; 75:3814-20. [PMID: 20462208 DOI: 10.1021/jo100680b] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclic cis-beta-amino Weinreb amides, valuable building blocks for the asymmetric synthesis of cyclic beta-amino acids derivatives, are readily prepared via ring-closing metathesis of sulfinimine-derived N-sulfinyl beta-amino diene Weinreb amides. These unsaturated cyclic cis-beta-amino Weinreb amides are valuable building blocks for the asymmetric synthesis of cyclic beta-amino acid derivatives.
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Affiliation(s)
- Franklin A Davis
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA.
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Davis FA, Theddu N, Edupuganti R. Asymmetric Total Synthesis of (S)-(+)-Cocaine and the First Synthesis of Cocaine C-1 Analogs from N-Sulfinyl β-Amino Ester Ketals. Org Lett 2010; 12:4118-21. [DOI: 10.1021/ol1017118] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Franklin A. Davis
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122
| | - Naresh Theddu
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122
| | - Ram Edupuganti
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122
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Monge D, Jensen K, Franke P, Lykke L, Jørgensen K. Asymmetric One-Pot Sequential Organo- and Gold Catalysis for the Enantioselective Synthesis of Dihydropyrrole Derivatives. Chemistry 2010; 16:9478-84. [DOI: 10.1002/chem.201001123] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Davis FA, Edupuganti R. Asymmetric Synthesis of Substituted Homotropinones from N-Sulfinyl β-Amino Ketone Ketals. (−)-Euphococcinine and (−)-Adaline. Org Lett 2010; 12:848-51. [DOI: 10.1021/ol902910w] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Franklin A. Davis
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122
| | - Ram Edupuganti
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122
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Davis FA, Song M, Qiu H, Chai J. Total synthesis of (5R,6R,8R,9S)-(−)-5,9Z-indolizidine 221T using sulfinimine-derived N-sulfinyl β-amino ketones. Org Biomol Chem 2009; 7:5067-73. [DOI: 10.1039/b915796d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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