1
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Shah DJ, Sharma AS, Shah AP, Sharma VS, Athar M, Soni JY. Fixation of CO2 as a carboxylic acid precursor by microcrystalline cellulose (MCC) supported Ag NPs: a more efficient, sustainable, biodegradable and eco-friendly catalyst. NEW J CHEM 2019. [DOI: 10.1039/c8nj06373g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver nanoparticles supported on microcrystalline cellulose (Ag NPs@MCC), an active catalyst, has been discovered for the direct carbonylation of terminal alkynes with CO2 into carboxylic acid under mild and sustainable reaction conditions.
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Affiliation(s)
- Dharmesh J. Shah
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | - Anuj S. Sharma
- Department of Chemistry
- School of Science
- Gujarat University
- Ahmedabad
- India
| | | | - Vinay S. Sharma
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | - Mohd Athar
- Department of Chemistry
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar
- India
| | - Jigar Y. Soni
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
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2
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Wu XF, Zheng F. Synthesis of Carboxylic Acids and Esters from CO 2. Top Curr Chem (Cham) 2016; 375:4. [PMID: 27957706 DOI: 10.1007/s41061-016-0091-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 11/23/2016] [Indexed: 12/20/2022]
Abstract
The achievements in the synthesis of carboxylic acids and esters from CO2 have been summarized and discussed.
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Affiliation(s)
- Xiao-Feng Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou, 310018, People's Republic of China.
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059, Rostock, Germany.
| | - Feng Zheng
- Hangzhou Branch of Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 600 No. 21 Street, Hangzhou, China.
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3
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Suneel Kumar CV, Ramana CV. Tuning the Regioselectivity of Gold-Catalyzed Internal Nitroalkyne Redox: A Cycloisomerization and [3 + 2]-Cycloaddition Cascade for the Construction of spiro-Pseudoindoxyl Skeleton. Org Lett 2014; 16:4766-9. [DOI: 10.1021/ol502213w] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Chepuri V. Suneel Kumar
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. HomiBhabha Road, Pune 411 008, India
| | - Chepuri V. Ramana
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. HomiBhabha Road, Pune 411 008, India
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4
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Heravi MM, Zadsirjan V. Recent advances in the application of the Oppolzer camphorsultam as a chiral auxiliary. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.07.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Zhao SB, Bilodeau E, Lemieux V, Beauchemin AM. Hydrogen bonding directed intermolecular Cope-type hydroamination of alkenes. Org Lett 2012; 14:5082-5. [PMID: 23005340 DOI: 10.1021/ol3023177] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Intermolecular hydroamination of unactivated alkenes represents a significant synthetic challenge. An efficient Cope-type hydroamination is achieved under mild conditions for reactions of N-alkylhydroxylamines with allylic amines, using hydrogen bonding to achieve increased reactivity and high regioselectivity. This approach provides a number of highly functionalized vicinal diamine motifs as Markovnikov addition products.
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Affiliation(s)
- Shu-Bin Zhao
- Center for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
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6
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Manjolinho F, Arndt M, Gooßen K, Gooßen LJ. Catalytic C–H Carboxylation of Terminal Alkynes with Carbon Dioxide. ACS Catal 2012. [DOI: 10.1021/cs300448v] [Citation(s) in RCA: 168] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Filipe Manjolinho
- Department
of Chemistry, University of Kaiserslautern, Erwin-Schrödinger-Strasse 54,
67663 Kaiserslautern, Germany
| | - Matthias Arndt
- Department
of Chemistry, University of Kaiserslautern, Erwin-Schrödinger-Strasse 54,
67663 Kaiserslautern, Germany
| | - Käthe Gooßen
- Department
of Chemistry, University of Kaiserslautern, Erwin-Schrödinger-Strasse 54,
67663 Kaiserslautern, Germany
| | - Lukas J. Gooßen
- Department
of Chemistry, University of Kaiserslautern, Erwin-Schrödinger-Strasse 54,
67663 Kaiserslautern, Germany
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7
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Krenske EH, Agopcan S, Aviyente V, Houk KN, Johnson BA, Holmes AB. Causation in a cascade: the origins of selectivities in intramolecular nitrone cycloadditions. J Am Chem Soc 2012; 134:12010-5. [PMID: 22788115 DOI: 10.1021/ja300002k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The factors controlling chemo-, regio-, and stereoselectivity in a cascade of reactions starting from a bis(cyanoalkenyl)oxime and proceeding via nitrone cycloadditions have been unraveled through a series of density functional theory calculations with several different functionals. Both kinetic and thermodynamic control of the reaction cascade are important, depending upon the conditions. Kinetic control was analyzed by the distortion/interaction model and found to be dictated by differences in distortions of the cycloaddends in the transition states. A new mechanism competing with that originally proposed in the application of these reactions to the histrionicotoxin synthesis was discovered in these studies.
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8
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Dumas AM, Molander GA, Bode JW. Amide-Forming Ligation of Acyltrifluoroborates and Hydroxylamines in Water. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201077] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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9
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Dumas AM, Molander GA, Bode JW. Amide-forming ligation of acyltrifluoroborates and hydroxylamines in water. Angew Chem Int Ed Engl 2012; 51:5683-6. [PMID: 22539274 DOI: 10.1002/anie.201201077] [Citation(s) in RCA: 124] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Indexed: 02/01/2023]
Affiliation(s)
- Aaron M Dumas
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH) Zürich, Wolfgang Pauli Strasse 10, 8093 Zürich, Switzerland
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10
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Krenske EH, Davison EC, Forbes IT, Warner JA, Smith AL, Holmes AB, Houk KN. Reverse cope elimination of hydroxylamines and alkenes or alkynes: theoretical investigation of tether length and substituent effects. J Am Chem Soc 2012; 134:2434-41. [PMID: 22280245 DOI: 10.1021/ja211568k] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Quantum mechanical calculations have been used to study the intramolecular additions of hydroxylamines to alkenes and alkynes ("reverse Cope eliminations"). In intermolecular reverse Cope eliminations, alkynes are more reactive than alkenes. However, competition experiments have shown that tethering the hydroxylamine to the alkene or alkyne can reverse the reactivity order from that normally observed. The exact outcome depends on the length of the tether. In agreement with experiment, a range of density functional theory methods and CBS-QB3 calculations predict that the activation energies for intramolecular reverse Cope eliminations follow the order 6-exo-dig < 5-exo-trig < 5-exo-dig ≈ 7-exo-dig. The order of the barriers for the 5-, 6-, and 7-exo-dig reactions of alkynes arises mainly from differences in tether strain in the transition states (TSs), but is also influenced by the TS interaction between the hydroxylamine and alkyne. Cyclization onto an alkene in the 5-exo-trig fashion incurs slightly less tether strain than a 6-exo-dig alkyne cyclization, but its activation energy is higher because the hydroxylamine fragment must distort more before the TS is reached. If the alkene terminus is substituted with two methyl groups, the barrier becomes so much higher that it is also disfavored compared to the 5- and 7-exo-dig cyclizations.
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11
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Yang D, Micalizio GC. Convergent and stereodivergent synthesis of complex 1-aza-7-oxabicyclo[2.2.1]heptanes. J Am Chem Soc 2011; 133:9216-9. [PMID: 21604673 DOI: 10.1021/ja202900h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convergent and stereodivergent pathway to highly substituted 1-aza-7-oxabicyclo[2.2.1]heptanes is described. It begins with a coupling reaction involving allylic alcohol, aldehyde, and LiHMDS to produce stereodefined primary homoallylic amines. Subsequent N-oxidation and condensation with formaldehyde or glyoxylate defines a convenient entry to densely functionalized homoallylic nitrones whose intramolecular annulation can be controlled to deliver one of two distinct heterocyclic skeletons, each with ≥20:1 stereoselection. Control of the stereochemistry in these reactions results from both control of the nitrone geometry and selective partitioning of the reaction pathway between direct [3 + 2] cycloaddition and tandem [3,3] rearrangement/[3 + 2] cycloaddition.
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Affiliation(s)
- Dexi Yang
- Department of Chemistry, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458, USA
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12
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Entropy versus tether strain effects on rates of intramolecular 1,3-dipolar cycloadditions of N-alkenylnitrones. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.11.121] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Chen QH, Yu XZ, Zhang TY, Jia XB. Studies on intramolecular 1,3-dipolar cycloaddition reactions: III. The synthesis of a novel heterocyclic ring system by regiospecific cycloaddition. ACTA CHIMICA SINICA 2010. [DOI: 10.1002/cjoc.19890070212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Naito T, Shirakawa M, Ikai M, Ninomiya I, Kiguchi T. The dipolar 1,3 cycloaddition of C,N-dialkylnitrone to olefins with hydroxyl group and the derivatives. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19961150104] [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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15
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Nett M, Gulder TAM, Kale AJ, Hughes CC, Moore BS. Function-oriented biosynthesis of beta-lactone proteasome inhibitors in Salinispora tropica. J Med Chem 2009; 52:6163-7. [PMID: 19746976 DOI: 10.1021/jm901098m] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The natural proteasome inhibitor salinosporamide A from the marine bacterium Salinispora tropica is a promising drug candidate for the treatment of multiple myeloma and mantle cell lymphoma. Using a comprehensive approach that combined chemical synthesis with metabolic engineering, we generated a series of salinosporamide analogues with altered proteasome binding affinity. One of the engineered compounds is equipotent to salinosporamide A in inhibition of the chymotrypsin-like activity of the proteasome yet exhibits superior activity in the cell-based HCT-116 assay.
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Affiliation(s)
- Markus Nett
- Scripps Institution of Oceanography, University of California at San Diego, La Jolla, California 92093, USA
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16
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Stephens BE, Liu F. A regio- and diastereoselective intramolecular nitrone cycloaddition for practical 3- and 2,3-disubstituted piperidine synthesis from gamma-butyrolactone. J Org Chem 2009; 74:254-63. [PMID: 19053606 DOI: 10.1021/jo8018285] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A fast and efficient route for diversity-oriented synthesis of 3- and 2,3-disubstituted piperidines, featuring an intramolecular nitrone cycloaddition with high regio- and diastereoselectivity, was achieved in six steps and 36-66% overall yield from commercially available gamma-butyrolactone or 1,4-butanediol. A new N-alkenyl nitrone enoate was used in this intramolecular nitrone cycloaddition, and the regioselectivity, diastereoselectivity, and reversibility of this cycloaddition were investigated.
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Affiliation(s)
- Benjamin E Stephens
- Department of Chemistry & Biomolecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
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17
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Padar P, Bokros A, Paragi G, Forgó P, Kele Z, Howarth NM, Kovacs L. Single Diastereomers of Polyhydroxylated 9-Oxa-1-azabicyclo[4.2.1]nonanes from Intramolecular 1,3-Dipolar Cycloaddition of ω-Unsaturated Nitrones. J Org Chem 2006; 71:8669-72. [PMID: 17064056 DOI: 10.1021/jo061503b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
8-Benzyloxymethyl-3,4,5-tribenzoyloxy-9-oxa-1-azabicyclo[4.2.1]nonane has been prepared as the single diastereoisomer 8 from an intramolecular 1,3-dipolar cycloaddition involving 2-(benzyloxy)acetaldehyde and omega-unsaturated hydroxylamine 7 derived from methyl alpha-D-glucopyranoside. The analogous 8-methoxycarbonyl 9-oxa-1-azabicyclo[4.2.1]nonane was afforded in a similar manner, from methyl D-galactopyranoside and methyl glyoxylate, as a 3:1 mixture of diastereoisomers 15 and 16. When conducted in achiral ionic liquid 17 this ratio increased to 8:1, and in chiral ionic liquid 18, compound 15 was formed exclusively.
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Affiliation(s)
- Petra Padar
- Department of Medicinal Chemistry, University of Szeged, H-6720, Hungary
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18
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Ishiyama H, Tsuda M, Endo T, Kobayashi J. Asymmetric synthesis of double bond isomers of the structure proposed for pyrinodemin A and indication of its structural revision. Molecules 2005; 10:312-6. [PMID: 18007301 PMCID: PMC6147537 DOI: 10.3390/10010312] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2004] [Revised: 01/24/2005] [Accepted: 01/24/2005] [Indexed: 11/20/2022] Open
Abstract
Asymmetric synthesis of double bond isomers (+)-2 (Δ15’,16’) and (+)-3 (Δ14’,15’) of the structure (1) (Δ16’,17’) proposed for pyrinodemin A, a cytotoxic bis-pyridine alkaloid with a unique cis-cyclopent[c]isoxazolidine moiety from a marine sponge, has been accomplished. Pyrinodemin A was indicated to be a 1:1 racemic mixture of 2 from comparison of C18 and chiral HPLC analysis for pyrinodemin A and the synthetic compounds as well as ESIMS data of oxidative degradation products of pyrinodemin A.
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19
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White JD, Hansen JD. Total Synthesis of (−)-7-Epicylindrospermopsin, a Toxic Metabolite of the Freshwater Cyanobacterium Aphanizomenon ovalisporum, and Assignment of Its Absolute Configuration. J Org Chem 2004; 70:1963-77. [PMID: 15760174 DOI: 10.1021/jo0486387] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The Z and E nitrones 38 and 39 from condensation of aldehyde 20 with hydroxylamine 36 underwent intramolecular dipolar cycloaddition to give the substituted 1-aza-7-oxobicyclo[2.2.1] heptanes 40 and 41 in a ratio of 2:1, respectively. Reductive N-O bond cleavage of 40 followed by carbonylation gave cyclic urea 47 in which inversion of the secondary alcohol was effected via an oxidation-reduction sequence. After conversion of the p-bromobenzyl ether 50 to azide 54, activation of the cyclic urea as its O-methylisourea and reduction of the azide led to spontaneous cyclization to afford the tricyclic nucleus 59 of cylindrospermopsin. Global deprotection, including hydrolysis of the 2,4-dimethyoxypyrimidine appendage to a uracil, and then monosulfation of the resultant diol 60 afforded a substance identical with natural (-)-7-epicylindrospermopsin (1). The asymmetric synthesis of (-)-7-epicylindrospermopsin defines its absolute configuration as 7S,8R,10S,12S,13R,14S.
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Affiliation(s)
- James D White
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, USA
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20
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White JD, Hansen JD. Asymmetric synthesis of epicylindrospermopsin via intramolecular nitrone cycloaddition. Assignment of absolute configuration. J Am Chem Soc 2002; 124:4950-1. [PMID: 11982346 DOI: 10.1021/ja012709r] [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: 11/30/2022]
Abstract
A synthesis of (-)-epicylindrospermopsin (2) was completed that establishes its absolute configuration and corroborates the corrected structural assignment previously made to this toxin by Weinreb et al. The hydroxylamine 3, prepared from 4-bromobenzyloxyacetaldehyde, was condensed with aldehyde 4, obtained in nine steps from (R)-methionine, to give nitrone 16. Intramolecular cycloaddition of 16 proceeded stereoselectively to yield the oxazabicyclo[2.2.1]heptane 17, which after reduction and deprotection afforded piperidine 18. The latter was transformed via cyclic urea 19 to the inverted C12 alcohol 20, and the derived azide 22 was cyclized to produce the guanidine moiety of 25. Final sulfation of the C12 hydroxyl group furnished (-)-2.
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Affiliation(s)
- James D White
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, USA.
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21
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Ali Dondas H, Grigg R, Thibault S. X=Y–ZH Systems as potential 1,3-dipoles. Part 52: Fused-ring forming electrophile induced oxime→nitrone→cycloaddition cascades. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00661-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Tranmer GK, Tam W. Intramolecular 1,3-dipolar cycloadditions of norbornadiene-tethered nitrones. J Org Chem 2001; 66:5113-23. [PMID: 11463264 DOI: 10.1021/jo015610b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Efficient routes to the synthesis of norbornadiene-tethered nitrones have been developed, and their intramolecular 1,3-dipolar cycloadditions were studied. The cycloadditions occurred in moderate to good yields for a variety of substrates and were found to be highly regio- and stereoselective, giving single regio- and stereoisomers in most cases.
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Affiliation(s)
- G K Tranmer
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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23
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Abstract
This paper describes the synthesis of (+)-allopumiliotoxin 323B' (1) using the intramolecular [3 + 2]-cycloaddition reaction of the (Z)-N-alkenylnitrone 4. This synthesis began with (R)-tert-butyl-3-hydroxy-pent-4-enoate [(R)-13] which was obtained by enzymatic resolution with Amano PS lipase. A series of manipulations gave intermediate 17 and in situ coupling with 4-benzoyloxybutanal lead to the (Z)-N-alkenylnitrone 4 which underwent an intramolecular [3 + 2]-cycloaddition reaction to give the isoxazolidine 3 as the major cycloadduct. Isoxazolidine 3 provided the piperidinone 24 which upon diastereofacial selective addition of MeMgBr gave the required tertiary alcohol 25. Formation of the indolizidine core 2 was achieved by an intramolecular S(N)2 reaction. The side chain was assembled from a Wittig reaction between the phosphorane 8 and the enantiomerically pure aldehyde 9. Further modifications afforded the aldehyde 7 which underwent an aldol condensation with the potassium enolate of the indolizidone core 2. Dehydration gave the enone 37 which was converted into the anti-diol 38 by intramolecular hydride reduction. Finally, deprotection of the BOM protecting group gave (+)-allopumiliotoxin 323B' (1).
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Affiliation(s)
- C H Tan
- Department of Chemistry, University of Cambridge, UK.
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24
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Budzińska A, Sas W. Preparation of highly substituted 7-oxa-1-azabicyclo[2.2.1]heptanes from 4-nitro-1-butene derivatives. Route to polysubstituted piperidines. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00021-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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26
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Lalk M, Reinke H, Peseke K. A Novel Approach to Anellated Carbasugar Derivatives, Using Intramolecular 1,3-Dipolar Cycloaddition Reactions of Sugar-Derived Nitrones. European J Org Chem 2001. [DOI: 10.1002/1099-0690(200102)2001:4<759::aid-ejoc759>3.0.co;2-r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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27
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Looper RE, Williams RM. Construction of the A-ring of cylindrospermopsin via an intramolecular oxazinone-N-oxide dipolar cycloaddition. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(00)01921-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Bagley MC, Tovey J. Diastereoselective synthesis of cis-2,5-disubstituted pyrrolidine N-oxides by the retro-Cope elimination. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(00)01964-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Oppolzer W, Bochet CG. Asymmetric synthesis of the spirocyclic core of the cylindricine-type alkaloids. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(00)00447-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Hems WP, Tan CH, Stork T, Feeder N, Holmes AB. Intramolecular cyclisation of (Z)-N-4-alkenylnitrones and the effects of alkenyl substituents. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(98)02617-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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31
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Tan CH, Stork T, Feeder N, Holmes AB. Stereoselective synthesis of the indolizidine core of the allopumiliotoxins. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(98)02618-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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32
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Budzińska A, Bukowska M, Sas W. Preparation of 2,2,6-trisubstituted 7-oxa-1-azabicyclo[2.2.1]heptanes from 4-nitro-1-butene derivatives. A route to 2,2,6-trisubstituted-4-hydroxypiperidines. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(98)02357-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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33
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Kiguchi T, Shirakawa M, Honda R, Ninomiya I, Naito T. Total synthesis of (+)-azimic acid, (+)-julifloridine, and proposed structure ofN-methyljulifloridine via cycloaddition of nitrone to a chiral dipolarophile. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)01012-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Crimmins MT, Kirincich SJ, Wells AJ, Choy AL. An Improved Synthetic Preparation of 3-Butenal. SYNTHETIC COMMUN 1998. [DOI: 10.1080/00397919808004914] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Black DS, Craig DC, Edwards GL, Laaman SM. Intramolecular cycloaddition of 5-alkenyl-1-pyrroline 1-oxide-5-carboxylic esters. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)01159-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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36
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Motorina IA, Fowler FW, Grierson DS. Intramolecular Diels-Alder Reaction of N-Alkyl-2-cyano-1-azadienes: A Study of the Eschenmoser Cycloreversion of Dihydrooxazines as a Route to N-Alkyl-2-cyano-1-azadienes. J Org Chem 1997; 62:2098-2105. [PMID: 11671514 DOI: 10.1021/jo9614046] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In connection with the development of the intramolecular Diels-Alder reaction (IMDA) of 1-azadienes, the 5,6-dihydro-4H-1,2-oxazine 12has been evaluated as a synthon equivalent of the 2-cyano-1-azadiene system. It was found that the dihydrooxazonium salt 27, generated in situ from the cyclic hydroxamic acid derivative 26, is converted directly to azadiene 4a via tautomerization to the corresponding enamine and a particularly facile Eschenmoser type cycloreversion process. Conditions were subsequently found for the preparation of synthon 12. N-Alkylation of this intermediate with alkyl bromides in the presence of Ag(+) ion also resulted in direct formation of the 2-cyano-1-azadiene products 38a-dand 4a. Microwave irradiation of a benzene solution of azadiene 4a proved to be a convenient means to effect its IMDA conversion to indolizidine 5a. To avoid decomposition of azadiene 38c, its intramolecular cycloaddition giving 40 (60%) was achieved by flash vacuum thermolysis.
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Affiliation(s)
- Irina A. Motorina
- Institut de Chimie des Substances Naturelles, 91198 Gif-sur Yvette, France, and Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794
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Nakamura H, Aoyagi K, Singaram B, Cai J, Nemoto H, Yamamoto Y. Eine neuartige [3+2]-Anellierung einesortho-Carboranyltrimethylsilans an konjugierte Carbonylverbindungen. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971090423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Relative and absolute stereocontrol in intramolecular nitrone cycloadditions to the cyclohexene ring. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00676-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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Aurich HG, Quintero JLR, Sievers U. Formation of tricyclic compounds in domino reactions of alkenal oximes. European J Org Chem 1995. [DOI: 10.1002/jlac.1995199509229] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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Rudge AJ, Collins I, Holmes AB, Baker R. Enantioselektive Synthese von Desoxynojirimycin. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941062229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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41
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Grigg R, Dorrity MJ, Heaney F, Malone JF, Rajviroongit S, Sridharan V, Surendrakumar S. X=Y-ZH systems as potential 1,3-dipoles. Part 34. generation of nitrones from oximes. Tandem michael addition-1,3-dipolar cycloaddition reactions. class 2 processes utilising bifunctional michael acceptor-dipolarophile components. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)91022-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Collins I, Fox ME, Holmes AB, Williams SF, Baker R, Forbes IJ, Thompson M. The total synthesis of (±)-indolizidines 235B and 235B′. ACTA ACUST UNITED AC 1991. [DOI: 10.1039/p19910000175] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Snider BB, Walner M. Preparation of unsaturated α,α-dichloro acid chlorides and intramolecular [2 + 2] cycloadditions of the α-chloroketenes reductively generated from them. Effect of double bond geometry on the cycloaddition. Tetrahedron 1989. [DOI: 10.1016/s0040-4020(01)80143-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Carling RW, Leeson PD. Synthesis of iminomethano-dibenzo[a,e]cyclooctenes by transannular formation and cleavage of isoxazolidines. Tetrahedron Lett 1988. [DOI: 10.1016/s0040-4039(00)88495-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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48
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Stereoselective Intramolecular Nitrone Cycloaddition in the Synthesis of Lasubine II. ACTA ACUST UNITED AC 1986. [DOI: 10.1002/jlac.198619861102] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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