1
|
Bubyrev A, Adamchik M, Dar'in D, Kantin G, Krasavin M. Metal-free Three-Component Synthesis of 1,2,3-Triazoline-4-sulfonamides. J Org Chem 2021; 86:13454-13464. [PMID: 34515479 DOI: 10.1021/acs.joc.1c01552] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new type of diazo compounds, namely, CH-diazomethane sulfonamides (generated in situ from readily available α-acetyl-α-diazomethane sulfonamides), was employed in a 1,3-dipolar cycloaddition reaction with imines (also formed in situ from primary amines and aldehydes). The reaction gave hitherto undescribed 1,5-disubstituted 1,2,3-triazoline-4-sulfonamides, which were obtained in good to excellent yields with complete trans diastereoselectivity. These new sulfonamides based on the nonaromatic 1,2,3-triazoline core are rather attractive from a medicinal chemistry standpoint in light of the strong emphasis recently put on the nonflat, more saturated (higher Fsp3) scaffolds for lead-generation libraries. The oxidative aromatization of 1,2,3-triazoline-4-sulfonamides by manganese(IV) oxide gave nearly quantitative yields of 1,2,3-triazole-4-sulfonamides, of which only two examples have been reported in the literature.
Collapse
Affiliation(s)
- Andrey Bubyrev
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Maria Adamchik
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Dmitry Dar'in
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Grigory Kantin
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Mikhail Krasavin
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| |
Collapse
|
2
|
Matikonda SS, Fairhall JM, Fiedler F, Sanhajariya S, Tucker RAJ, Hook S, Garden AL, Gamble AB. Mechanistic Evaluation of Bioorthogonal Decaging with trans-Cyclooctene: The Effect of Fluorine Substituents on Aryl Azide Reactivity and Decaging from the 1,2,3-Triazoline. Bioconjug Chem 2018; 29:324-334. [DOI: 10.1021/acs.bioconjchem.7b00665] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Siddharth S. Matikonda
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Jessica M. Fairhall
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Franziska Fiedler
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Suchaya Sanhajariya
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Robert A. J. Tucker
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Sarah Hook
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Anna L. Garden
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Allan B. Gamble
- School of Pharmacy and ‡Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| |
Collapse
|
3
|
Tait K, Horvath A, Blanchard N, Tam W. Acid-catalyzed ring-opening reactions of a cyclopropanated 3-aza-2-oxabicyclo[2.2.1]hept-5-ene with alcohols. Beilstein J Org Chem 2017; 13:2888-2894. [PMID: 29564016 PMCID: PMC5753073 DOI: 10.3762/bjoc.13.281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 12/17/2017] [Indexed: 11/23/2022] Open
Abstract
The acid-catalyzed ring-opening reactions of a cyclopropanated 3-aza-2-oxabicylic alkene using alcohol nucleophiles were investigated. Although this acid-catalyzed ring-opening reaction did not cleave the cyclopropane unit as planned, this represent the first examples of ring-openings of cyclopropanated 3-aza-2-oxabicyclo[2.2.1]alkenes that lead to the cleavage of the C-O bond instead of the N-O bond. Different acid catalysts were tested and it was found that pyridinium toluenesulfonate in methanol gave the best yields in the ring-opening reactions. The scope of the reaction was successfully expanded to include primary, secondary, and tertiary alcohol nucleophiles. Through X-ray crystallography, the stereochemistry of the product was determined which confirmed an SN2-like mechanism to form the ring-opened product.
Collapse
Affiliation(s)
- Katrina Tait
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Alysia Horvath
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Nicolas Blanchard
- Laboratoire de Chimie Moléculaire, ECPM-CNRS UMR7509, University of Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
| | - William Tam
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| |
Collapse
|
4
|
Abstract
The nitrosocarbonyls (R-CONO) are highly reactive species and remarkable intermediates toward different synthetic targets. This review will cover a research area whose impact in current organic synthesis is constantly increasing in the chemical community. This review represents the first and comprehensive picture on the generation and trapping of nitrosocarbonyls and is solidly built on more than 380 papers. Six different classes of key starting materials such as hydroxamic acids, N-hydroxy carbamates, N-hydroxyureas, nitrile oxides, and 1,2,4-oxadiazole-4-oxides were highlighted. The content of the review surveys all the methods to generate the nitrosocarbonyls through different approaches (oxidative, thermal, photochemical, catalytic, aerobic, and the less common ones) in the light of efficiency, yields, and mildness. The most successful trapping agents employed to catch these fleeting intermediates are reviewed, exploiting their superior dienophilic, enophilic, and electrophilic power. The work is completed by paragraphs dedicated to the detection of the intermediates, theoretical studies, and insights about the challenges and future directions for the field.
Collapse
Affiliation(s)
- Misal Giuseppe Memeo
- Dipartimento di Chimica, Università degli Studi di Pavia , Viale Taramelli 12, 27100 Pavia, Italy
| | - Paolo Quadrelli
- Dipartimento di Chimica, Università degli Studi di Pavia , Viale Taramelli 12, 27100 Pavia, Italy
| |
Collapse
|
5
|
Savion M, Bovio B, Quadrelli P. Paralipomena of the Isoxazoline Carbocyclic Nucleoside Analogs. ChemistrySelect 2016. [DOI: 10.1002/slct.201600281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Marco Savion
- Steroid S.p.A.; Viale Spagna 156 20093 - Cologno M.se (MI) Italy
| | - Bruna Bovio
- Department of Chemistry; University of Pavia; Viale Taramelli 12 27100 - Pavia Italy
| | - Paolo Quadrelli
- Department of Chemistry; University of Pavia; Viale Taramelli 12 27100 - Pavia Italy
| |
Collapse
|
6
|
Nakashima E, Yamamoto H. Continuous flow of nitroso Diels-Alder reaction. Chem Commun (Camb) 2016; 51:12309-12. [PMID: 26138229 DOI: 10.1039/c5cc03458b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Our flow reaction systems have provided quantitative yields of nitroso Diels-Alder products with no byproducts in cases of cyclic dienes without temperature and pressure controls. Additionally, the reaction times were significantly shortened by using homogeneous catalyst (CuCl) or heterogeneous reagent (MnO2) in comparison with batch reaction.
Collapse
Affiliation(s)
- Erika Nakashima
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, USA.
| | | |
Collapse
|
7
|
Ahamad S, Kant R, Mohanan K. Metal-Free Three-Component Domino Approach to Phosphonylated Triazolines and Triazoles. Org Lett 2016; 18:280-3. [PMID: 26727129 DOI: 10.1021/acs.orglett.5b03437] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An efficient, three-component domino reaction between aldehydes, amines, and the Bestmann-Ohira reagent is reported that enables a general, mild, and straightforward access to 1,4,5-trisubstituted 1,2,3-triazolines and triazoles. The reaction proceeds through a domino-condensation/1,3-dipolar cycloaddition sequence to afford the triazoline derivatives with excellent diastereoselectivity. Moreover, when both amine and aldehyde employed for this reaction are aromatic, a spontaneous oxidation afforded 1,4,5-trisubstituted triazoles in moderate yields.
Collapse
Affiliation(s)
- Shakir Ahamad
- Academy of Scientific and Innovative Research , New Delhi 110001, India
| | | | - Kishor Mohanan
- Academy of Scientific and Innovative Research , New Delhi 110001, India
| |
Collapse
|
8
|
Synthesis and antiviral activity of anthracene derivatives of isoxazolino-carbocyclic nucleoside analogues. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
9
|
Bhattacharya D, Ghorai A, Pal U, Chandra Maiti N, Chattopadhyay P. Stereoselective domino azidation and [3 + 2] cycloaddition: a facile route to chiral heterocyclic scaffolds from carbohydrate derived synthons. RSC Adv 2014. [DOI: 10.1039/c3ra45363d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
10
|
HNO made-easy from photochemical cycloreversion of novel 3,5-heterocyclic disubstituted 1,2,4-oxadiazole-4-oxides. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.06.067] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
11
|
Quadrelli P, Mella M, Legnani L, Al-Saad D. From Cyclopentadiene to Isoxazoline-Carbocyclic Nucleosides; Synthesis of Highly Active Inhibitors of Influenza A Virus H1N1. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300119] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
12
|
Scagnelli L, Memeo MG, Carosso S, Bovio B, Quadrelli P. Syntheses of New Carbanucleosides by Pericyclic Reactions. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300202] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
13
|
Beniazza R, Desvergnes V, Girard E, Kauffmann B, Berlande M, Landais Y. Development of domino processes by using 7-silylcycloheptatrienes and its analogues. Chemistry 2012; 18:11976-86. [PMID: 22926782 DOI: 10.1002/chem.201201527] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Indexed: 11/12/2022]
Abstract
7-Silyl- and 7-silylmethylcycloheptatrienes were shown to react with acylnitroso reagents at room temperature, through their norcaradiene forms, to generate the corresponding cycloadducts 5 a-b and 6 a-b as single diastereomers. The course of the reaction was dramatically modified by changing the reaction conditions. Using a polar medium, functionalized cyclohexa-1,3-dienes 7 a-b and bicyclic compounds 13 a-b were instead generated, incorporating one or two amino groups. Similar behavior was observed by using other dienophiles, including triazolinedione, but also activated aldehydes and ketones. A tentative mechanism has been proposed to rationalize the formation of both classes of products that relies on a domino process involving four consecutive elementary steps, in this order: 1) electrocyclic process, 2) hetero-Diels-Alder reaction, 3) cyclopropane ring opening, and 4) hetero-Diels-Alder reaction. Trapping of the cationic intermediate and isolation of the primary cycloadduct provide support for this hypothesis. An enantioselective version of the cascade using cycloheptatriene 4 b and aldehydes and ketones, under copper(II) catalysis was also carried out, leading to cyclohexa-1,3-dienes 21, 28, and 30 with enantioselectivities up to 93 % ee. Finally, elaboration of the intermediates above has been carried out, opening a straightforward access to sugar mimics 42-43 and complex polycyclic systems 36 and 39.
Collapse
Affiliation(s)
- Redouane Beniazza
- Université de Bordeaux, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351, cours de la libération, 33405 Talence Cedex, France
| | | | | | | | | | | |
Collapse
|
14
|
|
15
|
Savion M, Memeo MG, Bovio B, Grazioso G, Legnani L, Quadrelli P. Synthesis and molecular modeling of novel dihydroxycyclopentane-carbonitrile nor-nucleosides by bromonitrile oxide 1,3-dipolar cycloaddition. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.086] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
16
|
Durham R, Mandel J, Blanchard N, Tam W. Ruthenium-catalyzed [2+2] cycloaddition reactions of a 2-oxa-3-azabicyclo[2.2.1]hept-5-ene with unsymmetrical alkynes. CAN J CHEM 2011. [DOI: 10.1139/v11-135] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ruthenium-catalyzed [2+2] cycloaddition reactions of a 2-oxa-3-azabicyclo[2.2.1]hept-5-ene with unsymmetrical alkynes were investigated. Yields of up to 90% were obtained though regioselectivity was modest. Select cycloadducts could be separated and used to access a highly functionalized [3.2.0] bicyclic structure through reductive cleavage of the N–O bond. These ring-opened products displayed a chemical exchange phenomenon in 1D carbon NMR and required characterization by 2D NMR techniques.
Collapse
Affiliation(s)
- Robin Durham
- Guelph–Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Jérémie Mandel
- Université de Haute-Alsace, École Nationale Supérieure de Chimie de Mulhouse, Laboratoire de Chimie Organique et Bioorganique EA4566, 3 rue A. Werner, 68093 Mulhouse CEDEX, France
| | - Nicolas Blanchard
- Université de Haute-Alsace, École Nationale Supérieure de Chimie de Mulhouse, Laboratoire de Chimie Organique et Bioorganique EA4566, 3 rue A. Werner, 68093 Mulhouse CEDEX, France
| | - William Tam
- Guelph–Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
| |
Collapse
|
17
|
Bodnar BS, Miller MJ. The nitrosocarbonyl hetero-Diels-Alder reaction as a useful tool for organic syntheses. Angew Chem Int Ed Engl 2011; 50:5630-47. [PMID: 21520360 DOI: 10.1002/anie.201005764] [Citation(s) in RCA: 206] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Indexed: 11/11/2022]
Abstract
Organic transformations that result in the formation of multiple covalent bonds within the same reaction are some of the most powerful tools in synthetic organic chemistry. Nitrosocarbonyl hetero-Diels-Alder (HDA) reactions allow for the simultaneous stereospecific introduction of carbon-nitrogen and carbon-oxygen bonds in one synthetic step, and provide direct access to 3,6-dihydro-1,2-oxazines. This Review describes the development of the nitrosocarbonyl HDA reaction and the utility of the resulting oxazine ring in the synthesis of a variety of important, biologically active molecules.
Collapse
Affiliation(s)
- Brian S Bodnar
- Chemspeed Technologies, Inc. 113 North Center Drive, North Brunswick, NJ 08906, USA
| | | |
Collapse
|
18
|
Bodnar BS, Miller MJ. Hetero-Diels-Alder-Reaktionen von Nitrosocarbonylverbindungen als nützliches Verfahren in der organischen Synthese. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201005764] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
19
|
Quadrelli P, Romano S, Caramella P. Nonbonded Interactions Tune Selectivities in Cycloadditions to 2,3-Dioxabicyclo[2.2.2]oct-5-ene. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000732] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
20
|
Straightforward hetero Diels–Alder reactions of nitroso dienophiles by microreactor technology. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.08.117] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
21
|
Lin W, Virga KG, Kim KH, Zajicek J, Mendel D, Miller MJ. Diastereoselective synthesis of a spironoraristeromycin using an acylnitroso Diels-Alder reaction. J Org Chem 2010; 74:5941-6. [PMID: 19601571 DOI: 10.1021/jo900877b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The tert-butyl N-hydroxycarbamate-derived nitroso reagent 1 reacted with N-Cbz-protected spirocyclic diene 2 to provide spirocycloadduct 3. Here we describe the efficient conversion of 3 into the novel carbocyclic nucleoside spironoraristeromycin 4.
Collapse
Affiliation(s)
- Weimin Lin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | | | | | | | | | | |
Collapse
|
22
|
Ji C, Miller MJ. Cyclopropanation of nitroso Diels-Alder cycloadducts and application to the synthesis of a 2',3'-methano carbocyclic nucleoside. Tetrahedron Lett 2010; 51:3789-3791. [PMID: 20607121 PMCID: PMC2894734 DOI: 10.1016/j.tetlet.2010.05.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Treatment of nitroso Diels-Alder cycloadducts 1 with diazomethane in the presence of palladium acetate gives synthetically useful exo-6-oxa-7-azatricyclo[3.2.1.02,4]octane derivatives 7 in good to excellent yield. Using this methodology, a conformationally restricted 2',3'-methano carbocyclic nucleoside was efficiently synthesized from nitroso cycloadduct 1a in 7 steps.
Collapse
Affiliation(s)
- Cheng Ji
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana, 46556, United States
| | - Marvin J. Miller
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana, 46556, United States
| |
Collapse
|
23
|
Affiliation(s)
- Wenyi Zhao
- Shasun Pharma Solutions, Incorporated, 10 Knightsbridge Road, Pistcataway, New Jersey 08854, USA
| |
Collapse
|
24
|
Quadrelli P, Bovio B, Piccinini A, Caramella P, De Sarlo F, Machetti F. Conversion of a nitrosocarbonyl hetero Diels–Alder cycloadduct to useful isoxazoline-carbocyclic aminols. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.10.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
25
|
Zhang J, Chang CWT. One-Pot Synthesis of 1- and 2-Substituted Naphtho[2,3-d][1,2,3]triazole-4,9-diones. J Org Chem 2009; 74:4414-7. [DOI: 10.1021/jo9004926] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jianjun Zhang
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300
| | - Cheng-Wei Tom Chang
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300
| |
Collapse
|
26
|
Monbaliu JC, Marchand-Brynaert J, Peeters D. Is anthracene cofactor or spectator for the thermolysis of anthracenyl acylnitroso cycloadducts in the presence of a diene? Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.062] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
27
|
Lin W, Gupta A, Kim KH, Mendel D, Miller MJ. Syntheses of new spirocarbocyclic nucleoside analogs using iminonitroso Diels-Alder reactions. Org Lett 2009; 11:449-52. [PMID: 19072701 DOI: 10.1021/ol802553g] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
N-Cbz- and Boc-protected spirocyclic dienes were prepared by dialkylation of cyclopentadiene. These dienes coupled efficiently in a series of iminonitroso Diels-Alder reactions to produce a series of new spirocyclic adducts. Hydrogenolysis of these adducts afforded new spirocycles that contain multiple handles for further functionalization. Furthermore, stereocontrolled dihydroxylation and reductive cleavage of the spirocyclic adducts generated versatile scaffolds for the syntheses and derivatization of novel spirocyclic carbocyclic nucleoside analogs.
Collapse
Affiliation(s)
- Weimin Lin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | | | | | | | | |
Collapse
|
28
|
Orac CM, Bergmeier SC. A formal [3+2] cycloaddition for the synthesis of bicyclo[3.2.1]octanes. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2008.12.098] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
29
|
Quadrelli P, Romano S, Piccanello A, Caramella P. The Remarkable Cis Effect in the Ene Reactions of Nitrosocarbonyl Intermediates. J Org Chem 2009; 74:2301-10. [DOI: 10.1021/jo801641j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Paolo Quadrelli
- Dipartimento di Chimica Organica and Unità di Ricerca CNISM e Dipartimento di Fisica “A. Volta”, Università degli Studi di Pavia, Via Bassi 6, 27100 - Pavia, Italy
| | - Silvano Romano
- Dipartimento di Chimica Organica and Unità di Ricerca CNISM e Dipartimento di Fisica “A. Volta”, Università degli Studi di Pavia, Via Bassi 6, 27100 - Pavia, Italy
| | - Andrea Piccanello
- Dipartimento di Chimica Organica and Unità di Ricerca CNISM e Dipartimento di Fisica “A. Volta”, Università degli Studi di Pavia, Via Bassi 6, 27100 - Pavia, Italy
| | - Pierluigi Caramella
- Dipartimento di Chimica Organica and Unità di Ricerca CNISM e Dipartimento di Fisica “A. Volta”, Università degli Studi di Pavia, Via Bassi 6, 27100 - Pavia, Italy
| |
Collapse
|
30
|
Bodnar BS, Miller MJ. Brønsted acid-mediated opening of nitroso cycloadducts under anhydrous conditions. Tetrahedron Lett 2009; 50:796-798. [PMID: 20160837 DOI: 10.1016/j.tetlet.2008.11.120] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
An unusual bicyclic hydroxamate resulted from C-O bond cleavage of acylnitroso hetero-Diels-Alder cycloadducts when treated with catalytic Brønsted acids under anhydrous conditions. Similarly, the formation of a nitrone was observed using one equivalent of triflic acid.
Collapse
Affiliation(s)
- Brian S Bodnar
- Deparment of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556
| | | |
Collapse
|
31
|
Zhang J, Chang CWT. Divergent Synthesis of Three Classes of Aryl N-Glycosides by Solvent Control. J Org Chem 2008; 74:685-95. [DOI: 10.1021/jo8020133] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianjun Zhang
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300
| | - Cheng-Wei Tom Chang
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300
| |
Collapse
|
32
|
Beniazza R, Desvergnes V, Landais Y. 7-Silylcycloheptatrienes and Analogues: Reactivity and Selectivity in Cascade Processes. Org Lett 2008; 10:4195-8. [DOI: 10.1021/ol8016403] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Redouane Beniazza
- University Bordeaux 1, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351, cours de la libération, 33405 Talence cedex 05, France
| | - Valérie Desvergnes
- University Bordeaux 1, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351, cours de la libération, 33405 Talence cedex 05, France
| | - Yannick Landais
- University Bordeaux 1, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351, cours de la libération, 33405 Talence cedex 05, France
| |
Collapse
|
33
|
Gassensmith JJ, Barr L, Baumes JM, Paek A, Nguyen A, Smith BD. Synthesis and photophysical investigation of squaraine rotaxanes by "clicked capping". Org Lett 2008; 10:3343-6. [PMID: 18582079 DOI: 10.1021/ol801189a] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pseudorotaxane complexes of squaraine dyes and tetralactam macrocycles are converted into permanently interlocked rotaxane structures using copper-catalyzed and copper-free cycloaddition reactions with bulky stopper groups. The photophysical properties of the encapsulated squaraine depend on the structure of the macrocycle. In one case, squaraine rotaxanes are produced in near-quantitative yields and with intense near-IR fluorescence. In another case, squaraine fluorescence is greatly diminished upon macrocyclic encapsulation but the signal can be restored by dye displacement with anions.
Collapse
Affiliation(s)
- Jeremiah J Gassensmith
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | | | | | | | | | | |
Collapse
|
34
|
From cyclopentadiene to isoxazoline-carbocyclic nucleosides: a rapid access to biological molecules through aza-Diels–Alder reactions. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.124] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
35
|
Fantauzzi S, Gallo E, Caselli A, Piangiolino C, Ragaini F, Cenini S. The (Porphyrin)ruthenium-Catalyzed Aziridination of Olefins Using Aryl Azides as Nitrogen Sources. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700678] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|