1
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Ni Q, Xu F, Song X. Diastereoselective and E/Z-Selective Synthesis of Functionalized Quinolizine Scaffolds via the Dearomative Annulation of 2-Pyridylacetates with Nitroenynes. J Org Chem 2022; 87:9507-9517. [PMID: 35801688 DOI: 10.1021/acs.joc.2c00448] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An organocatalytic Michael/aza-Michael cascade reaction was developed to build the functionalized quinolizine scaffolds in 60-82% yields, excellent diastereoselectivities, and E/Z selectivities. This protocol involves the [3 + 3] annulations of 2-pyridylacetates with nitroenynes through the dearomative strategy in the presence of an organic base under mild conditions. The versatile late-stage derivatizations further demonstrated the synthetic utility of this methodology.
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Affiliation(s)
- Qijian Ni
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Fangfang Xu
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Xiaoxiao Song
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
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2
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Antony J, P. Musthafa S, Natarajan R, Mathai S, S. Devaky K, Rappai JP. Highly atom efficient synthesis of 2,2,4,5-tetrasubstituted 3(2H)-furanones having both hydroxyl and amino substituents. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2036347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Jesna Antony
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India
| | - Sumi P. Musthafa
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India
| | - Rakesh Natarajan
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, India
| | - Sindhu Mathai
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India
| | | | - John P. Rappai
- Department of Chemistry, Government Victoria College, Palakkad, India
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3
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Rappai JP, Antony J, Musthafa SP, Natarajan R. Expeditious synthesis of highly substituted 3(2H)-furanone and quinoline by microwave assisted reaction between aldonitrones and dibenzoylacetylene. NEW J CHEM 2022. [DOI: 10.1039/d2nj00991a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microwave assisted reaction between various aldonitrones and dibenzoylacetylene gave 2-hydroxy-2,5-diphenyl-4-(phenylamino)furan-3(2H)-one (5) and (3-hydroxy-2-phenylquinolin-4-yl)(phenyl)methanone (8) arising through two distinct reaction pathways in good yields. Compared to reactions carried out under thermal...
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4
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Mineeva IV. Diastereoselective Allylation of α-Hydroxy Schiff Bases with 2-Substituted Functionalized Allyl Bromides. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428021090086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Zou N, Qin X, Wang Z, Shi W, Mo D. Advances on the Synthesis and Application of α,β-Unsaturated Nitrones. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202109007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Heravi MM, Zadsirjan V, Hamidi H, Daraie M, Momeni T. Recent applications of the Wittig reaction in alkaloid synthesis. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2020; 84:201-334. [PMID: 32416953 DOI: 10.1016/bs.alkal.2020.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Wittig reaction is the chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide (the Wittig reagent) to afford an alkene and triphenylphosphine oxide. Noteworthy, this reaction results in the synthesis of alkenes in a selective and predictable fashion. Thus, it became as one of the keystone of synthetic organic chemistry, especially in the total synthesis of natural products, where the selectivity of a reaction is paramount of importance. A literature survey disclosed the existence of vast numbers of related reports and comprehensive reviews on the applications of this important name reaction in the total synthesis of natural products. However, the aim of this chapter is to underscore, the applications of the Wittig reaction in the total synthesis of one the most important and prevalent classes of natural products, the alkaloids, especially those showing important and diverse biological activities.
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran.
| | - Vahideh Zadsirjan
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
| | - Hoda Hamidi
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
| | - Mansoureh Daraie
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
| | - Tayebeh Momeni
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
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7
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Lahosa A, Yus M, Foubelo F. Enantiodivergent Approach to the Synthesis of Cis-2,6-Disubstituted Piperidin-4-ones. J Org Chem 2019; 84:7331-7341. [PMID: 31063684 DOI: 10.1021/acs.joc.9b01008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enantiopure β-amino ketone derivatives were synthesized by decarboxylative Mannich reaction of chiral N- tert-butanesulfinyl imines with β-keto acids and were subsequently transformed into cis-2,6-disubstituted piperidin-4-ones through an organocatalyzed condensation with aldehydes. Both enantiomers were accessible from the same precursors by inverting the order in the reaction sequence of the aldehydes involved in the imine formation and the intramolecular Mannich condensation. The synthesis of the piperidine alkaloids (+)-241D, (-)-epimyrtine, and (-)-lasubine II demonstrated the utility of this methodology.
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Affiliation(s)
- Alejandro Lahosa
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Instituto de Síntesis Orgánica (ISO) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain
| | - Francisco Foubelo
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Instituto de Síntesis Orgánica (ISO) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain
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8
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Yuan W, Pan Y, Zhang X, Liang P, Zhang J, Jiao W, Shao H. Direct and highly stereoselective synthesis of quinolizidine iminosugars promoted by l-proline-Et 3N. Org Biomol Chem 2018; 16:9230-9236. [PMID: 30483692 DOI: 10.1039/c8ob01953c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild and effective method for the synthesis of polyhydroxylated quinolizidine iminosugars is described. The Mannich-type reaction of iminosugar C-glycosides with aldehyde in the presence of l-proline-Et3N provides polyhydroxylated quinolizidine iminosugars, and desired products as the potential glucosidase inhibitors were obtained in good to excellent yields with excellent stereoselectivity.
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Affiliation(s)
- Wen Yuan
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, China.
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9
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Ho HE, James MJ, O’Brien P, Taylor RJK, Unsworth WP. Ag(I)-Catalyzed Synthesis of Azabicyclic Alkaloid Frameworks from Ketimine-Tethered Ynones: Total Synthesis of Indolizidine 209D. Org Lett 2018; 20:1439-1443. [DOI: 10.1021/acs.orglett.8b00225] [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)
- Hon Eong Ho
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
| | - Michael J. James
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
| | - Peter O’Brien
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
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10
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Kandepedu N, Abrunhosa-Thomas I, Troin Y. Stereoselective strategies for the construction of polysubstituted piperidinic compounds and their applications in natural products’ synthesis. Org Chem Front 2017. [DOI: 10.1039/c7qo00262a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An abridged and far-reaching review communication on the construction of the polysubstituted piperidinic core using diverse methodologies for the benefit of organic chemists interested in the total synthesis of biologically active compounds.
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Affiliation(s)
- Nishanth Kandepedu
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Isabelle Abrunhosa-Thomas
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Yves Troin
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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11
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James MJ, Grant ND, O’Brien P, Taylor RJK, Unsworth WP. Catalytic Dearomatization Approach to Quinolizidine Alkaloids: Five Step Total Synthesis of (±)-Lasubine II. Org Lett 2016; 18:6256-6259. [DOI: 10.1021/acs.orglett.6b03017] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Michael J. James
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Niall D. Grant
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Peter O’Brien
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | | | - William P. Unsworth
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
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12
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Reddy AA, Reddy PO, Prasad KR. Synthesis of β-Amino-Substituted Enones by Addition of Substituted Methyl Enones to Sulfinimines: Application to the Total Synthesis of Alkaloids (+)-Lasubine II and (+)-241D and the Formal Total Synthesis of (-)-Lasubine I. J Org Chem 2016; 81:11363-11371. [PMID: 27732001 DOI: 10.1021/acs.joc.6b01541] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Addition of silyl enol ethers obtained from substituted methyl enones to chiral sulfinimines afforded the β-amino-substituted enones with excellent selectivity. Utility of the obtained N-sulfinyl β-amino ketones possessing α,β-unsaturation is exemplified in the total synthesis of the quinolizidine alkaloid natural products (-)-lasubine I, (+)-lasubine II, and substituted piperidine alkaloid (+)-241-D.
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Affiliation(s)
| | - Polimera Obula Reddy
- Department of Organic Chemistry, Indian Institute of Science , Bangalore 560012, India
| | - Kavirayani R Prasad
- Department of Organic Chemistry, Indian Institute of Science , Bangalore 560012, India
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13
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Veerasamy N, Carter RG. Synthesis of quinolizidine-containing lycopodium alkaloids and related natural products. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Yokoyama T, Fukami Y, Sato T, Chida N. Synthesis of (±)-Lasubine II Using N-Methoxyamines. Chem Asian J 2016; 11:470-3. [PMID: 26582105 DOI: 10.1002/asia.201501143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Indexed: 12/28/2022]
Abstract
The synthesis of (±)-lasubine II has been achieved through a three-component allylation capitalizing on the unique properties of N-methoxyamines. This reaction enabled the installation of all the carbon atoms of lasubine II in a single operation. The N-methoxy group was efficiently used for the subsequent nitrone formation. A single-step cyclization of isoxazolidines or N-methoxyamines to form functionalized piperidine rings was also developed.
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Affiliation(s)
- Takashi Yokoyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Yutaro Fukami
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
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15
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Recent Advances of 1,3-Dipolar Cycloaddition Chemistry for Alkaloid Synthesisa. ADVANCES IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1016/bs.aihch.2016.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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N V G M, Dyapa R, Pansare SV. Formal Synthesis of (+)-Lasubine II and (-)-Subcosine II via Organocatalytic Michael Addition of a Ketone to an α-Nitrostyrene. Org Lett 2015; 17:5312-5. [PMID: 26492086 DOI: 10.1021/acs.orglett.5b02677] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The first examples of an organocatalytic Michael addition of a ketone to in situ generated α-nitrostyrenes are reported. A suitably functionalized γ-nitroketone obtained from the organocatalyzed Michael addition was converted into (+)-2-epi-lasubine II, the immediate synthetic precursor of (+)-lasubine II and (-)-subcosine II (enantiomers of the natural quinolizidine alkaloids). Two of the three stereocenters in (+)-2-epi-lasubine II are set by the Michael reaction.
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Affiliation(s)
- Moorthy N V G
- Department of Chemistry, Memorial University , St. John's, Newfoundland, Canada A1B 3X7
| | - Rajendar Dyapa
- Department of Chemistry, Memorial University , St. John's, Newfoundland, Canada A1B 3X7
| | - Sunil V Pansare
- Department of Chemistry, Memorial University , St. John's, Newfoundland, Canada A1B 3X7
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17
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Drège E, Venot PE, Le Bideau F, Retailleau P, Joseph D. Two-Component Domino Reactions Initiated from Ketenes: Serendipitous Synthesis of Quinolizidinones Analogous to Chelated Lobeline's Conformation. J Org Chem 2015; 80:10119-26. [PMID: 26366609 DOI: 10.1021/acs.joc.5b01727] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An original and efficient synthesis of quinolizidinones through a one-pot two-component cascade reaction of norlobelanine with in situ generated ketenes is reported. Functionalized fused azabicyclic scaffolds bearing multiple stereogenic centers were prepared with excellent diastereoselectivities. Mild optimized conditions involving a key "shuttle base" deprotonation strategy was applied to the synthesis, in a short sequence, of a constrained mimetic of the privileged H-bonded conformation of (-)-lobeline.
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Affiliation(s)
- Emmanuelle Drège
- Université Paris-Sud, UMR CNRS 8076 BioCIS, Université Paris-Saclay, Equipe de Chimie des Substances Naturelles , 5, rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry, France
| | - Pierre-Etienne Venot
- Université Paris-Sud, UMR CNRS 8076 BioCIS, Université Paris-Saclay, Equipe de Chimie des Substances Naturelles , 5, rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry, France
| | - Franck Le Bideau
- Université Paris-Sud, UMR CNRS 8076 BioCIS, Université Paris-Saclay, Equipe de Chimie des Substances Naturelles , 5, rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, UPR CNRS 2301, Université Paris-Saclay , Bât. 27, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette cedex, France
| | - Delphine Joseph
- Université Paris-Sud, UMR CNRS 8076 BioCIS, Université Paris-Saclay, Equipe de Chimie des Substances Naturelles , 5, rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry, France
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18
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Abstract
This review of simple indolizidine and quinolizidine alkaloids (i.e., those in which the parent bicyclic systems are in general not embedded in polycyclic arrays) is an update of the previous coverage in Volume 55 of this series (2001). The present survey covers the literature from mid-1999 to the end of 2013; and in addition to aspects of the isolation, characterization, and biological activity of the alkaloids, much emphasis is placed on their total synthesis. A brief introduction to the topic is followed by an overview of relevant alkaloids from fungal and microbial sources, among them slaframine, cyclizidine, Steptomyces metabolites, and the pantocins. The important iminosugar alkaloids lentiginosine, steviamine, swainsonine, castanospermine, and related hydroxyindolizidines are dealt with in the subsequent section. The fourth and fifth sections cover metabolites from terrestrial plants. Pertinent plant alkaloids bearing alkyl, functionalized alkyl or alkenyl substituents include dendroprimine, anibamine, simple alkaloids belonging to the genera Prosopis, Elaeocarpus, Lycopodium, and Poranthera, and bicyclic alkaloids of the lupin family. Plant alkaloids bearing aryl or heteroaryl substituents include ipalbidine and analogs, secophenanthroindolizidine and secophenanthroquinolizidine alkaloids (among them septicine, julandine, and analogs), ficuseptine, lasubines, and other simple quinolizidines of the Lythraceae, the simple furyl-substituted Nuphar alkaloids, and a mixed quinolizidine-quinazoline alkaloid. The penultimate section of the review deals with the sizable group of simple indolizidine and quinolizidine alkaloids isolated from, or detected in, ants, mites, and terrestrial amphibians, and includes an overview of the "dietary hypothesis" for the origin of the amphibian metabolites. The final section surveys relevant alkaloids from marine sources, and includes clathryimines and analogs, stellettamides, the clavepictines and pictamine, and bis(quinolizidine) alkaloids.
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Saha N, Chatterjee B, Chattopadhyay SK. δ,ε-Unsaturated α,β-Diamino Acids as Building Blocks for the Asymmetric Synthesis of Diverse α,β-Diamino Acids. J Org Chem 2015; 80:1896-904. [PMID: 25562112 DOI: 10.1021/jo5022162] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nemai Saha
- Department of Chemistry, University of Kalyani, Kalyani-741235, West Bengal, India
| | - Bhaskar Chatterjee
- Department of Chemistry, University of Kalyani, Kalyani-741235, West Bengal, India
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Saha N, Chattopadhyay SK. Enantioselective synthesis of polyhydroxyindolizidinone and quinolizidinone derivatives from a common precursor. Beilstein J Org Chem 2014; 10:3104-10. [PMID: 25670979 PMCID: PMC4311665 DOI: 10.3762/bjoc.10.327] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 12/14/2014] [Indexed: 11/23/2022] Open
Abstract
A concise asymmetric synthetic route to two new tetrahydroxyindolizidinone and quinolizidinone derivatives has been developed from a common intermediate which featured a highly selective dihydroxylation reaction and a RCM reaction as key steps.
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Affiliation(s)
- Nemai Saha
- Department of Chemistry, University of Kalyani, Kalyani - 741235, West Bengal, India, Fax: +91+33+25828282
| | - Shital K Chattopadhyay
- Department of Chemistry, University of Kalyani, Kalyani - 741235, West Bengal, India, Fax: +91+33+25828282
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21
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Scope and limitations of the synthesis of functionalized quinolizidinones and related compounds by a simple precursor approach via addition of lithium allylmagnesates to 2-pyridones and RCM as key steps. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.09.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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22
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Kim GW, Jin T, Kim JS, Park SH, Lee KH, Kim SS, Myeong IS, Ham WH. A concise synthesis of (−)-lentiginosine via an anti,syn-oxazine. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2013.11.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Hwang S, Park H, Kwon Y, Kim S. Acid promoted cyclodehydration of amino alcohols with amide acetal. RSC Adv 2014. [DOI: 10.1039/c4ra10625c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Intramolecular N-alkylation of amino alcohols using an amide acetal was developed that is widely applicable to the formation of azaheterocycles.
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Affiliation(s)
- Soonho Hwang
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
| | - Heemin Park
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
| | - Yongseok Kwon
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
| | - Sanghee Kim
- College of Pharmacy
- Seoul National University
- Seoul 151-742, Korea
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24
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James T, MacLellan P, Burslem GM, Simpson I, Grant JA, Warriner S, Sridharan V, Nelson A. A modular lead-oriented synthesis of diverse piperazine, 1,4-diazepane and 1,5-diazocane scaffolds. Org Biomol Chem 2014; 12:2584-91. [DOI: 10.1039/c3ob42512f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A modular synthetic approach is described in which combinations of cyclic sulfamidate and hydroxy sulfonamide building blocks may be converted into piperazine, 1,4-diazepine and 1,5-diazocane scaffolds.
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Affiliation(s)
- Thomas James
- School of Chemistry
- University of Leeds
- Leeds, UK
- Astbury Centre for Structural Molecular Biology
- University of Leeds
| | - Paul MacLellan
- School of Chemistry
- University of Leeds
- Leeds, UK
- Astbury Centre for Structural Molecular Biology
- University of Leeds
| | - George M. Burslem
- School of Chemistry
- University of Leeds
- Leeds, UK
- Astbury Centre for Structural Molecular Biology
- University of Leeds
| | | | | | - Stuart Warriner
- School of Chemistry
- University of Leeds
- Leeds, UK
- Astbury Centre for Structural Molecular Biology
- University of Leeds
| | | | - Adam Nelson
- School of Chemistry
- University of Leeds
- Leeds, UK
- Astbury Centre for Structural Molecular Biology
- University of Leeds
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Mironiuk-Puchalska E, Rowicki T, Sas W, Koszytkowska-Stawińska M. Convenient synthesis of epimeric indolizidines by the intramolecular 1,3-dipolar cycloaddition of a sugar derived N-(3-alkenyl)nitrone. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Saha N, Chattopadhyay SK. Enantiodivergency and enantioconvergency in the synthesis of the dendrobate alkaloid 241D. J Org Chem 2012. [PMID: 23205643 DOI: 10.1021/jo3019329] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A diastereodivergent preparation of two N-alkenylnitrones (9 and 11) from easily available (R)-2,3-O-cyclohexylideneglyceraldehyde (5) led to an enantiodivergent synthesis of both enantiomers of the dendrobate alkaloid 241D in a sequential two-directional approach involving intramolecular nitrone cycloaddition as the key step. Either of these two nitrones could, in principle, be utilized for the preparation of the title compounds in an enantioconvergent fashion as well. The methodology was extended to prepare an analogue (33) of (-)-241D.
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Affiliation(s)
- Nemai Saha
- Department of Chemistry, University of Kalyani, Kalyani-741235, West Bengal, India
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Biswas T, Mukherjee JP, Chattopadhyay SK. Enantiodivergent synthesis of N-protected azetidine-2-carboxylic acid. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.08.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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28
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Pei CK, Jiang Y, Shi M. Phosphorus-Containing Lewis Base Catalyzed Cascade Reactions of Isatin-Derived Oximes with Allenic Esters and Further Transformations. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200511] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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