1
|
Biswas A, Saleh SKA, Hazra A, Debnath SC, Hajra S. Sequential one-pot synthesis of N-sulfonyl spiroaziridine oxindoles from spiroepoxy oxindoles. Org Biomol Chem 2021; 19:5624-5631. [PMID: 34100039 DOI: 10.1039/d1ob00541c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The N-sulfonyl spiroaziridine oxindole is a recently developed versatile precursor in the synthesis of a wide range of 3,3-disubstituted spirooxindoles. It is usually prepared in three steps from isatin and needs costly and hardly available sulfinimides and hazardous peracid. A sequential and one-pot direct strategy for the synthesis of terminal N-sulfonyl spiroaziridine oxindoles has been developed under ambient conditions with excellent yields (up to 95%) from easily accessible spiroepoxy oxindoles by regioselective amination with aqueous ammonia and a subsequent ring enclosure reaction of the resulting 1,2-amino alcohol using easily available sulfonyl chloride and a base. Other salient features of the protocol include inexpensive substrate requirement and the ease of isolation of the desired product by performing single column chromatographic purification after two consecutive steps.
Collapse
Affiliation(s)
- Anurag Biswas
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India. and University of Kalyani, Kalyani, Nadia, West Bengal 741235, India
| | - S K Abu Saleh
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India.
| | - Atanu Hazra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India.
| | | | - Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India.
| |
Collapse
|
2
|
A new synthesis of 1,3-difunctionalized 2-sulfonamidopropane derivatives via regioselective ring opening reactions of 2-(bromomethyl)-1-sulfonylaziridines by substituted arylsulfonamides. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-019-02546-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
3
|
Ji F, Lv MF, Yi WB, Cai C. Synthesis of 1,4-Benzoxazepine Derivativesviaa Novel Domino Aziridine Ring-Opening and Isocyanide-Insertion Reaction. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300650] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
4
|
McLaughlin EC, Shrestha A, Fletcher MH, Steinauer NS, Shinn MK, Shahid SM. A solvent-free amidation of vinylogous esters via direct aziridination. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.135] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
5
|
Huang L, Zhang Y, Staples RJ, Huang RH, Wulff WD. Double Stereodifferentiation in the Catalytic Asymmetric Aziridination of Imines Prepared from α-Chiral Amines. Chemistry 2012; 18:5302-13. [PMID: 22434622 DOI: 10.1002/chem.201102520] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Li Huang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | | | | | | | | |
Collapse
|
6
|
Solid-phase route to Fmoc-protected cationic amino acid building blocks. Amino Acids 2012; 43:1633-41. [PMID: 22358257 DOI: 10.1007/s00726-012-1239-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 01/31/2012] [Indexed: 10/28/2022]
Abstract
Diamino acids are commonly found in bioactive compounds, yet only few are commercially available as building blocks for solid-phase peptide synthesis. In the present work a convenient, inexpensive route to multiple-charged amino acid building blocks with varying degree of hydrophobicity was developed. A versatile solid-phase protocol leading to selectively protected amino alcohol intermediates was followed by oxidation to yield the desired di- or polycationic amino acid building blocks in gram-scale amounts. The synthetic sequence comprises loading of (S)-1-(p-nosyl)aziridine-2-methanol onto a freshly prepared trityl bromide resin, followed by ring opening with an appropriate primary amine, on-resin N(β)-Boc protection of the resulting secondary amine, exchange of the N(α)-protecting group, cleavage from the resin, and finally oxidation in solution to yield the target γ-aza substituted building blocks having an Fmoc/Boc protection scheme. This strategy facilitates incorporation of multiple positive charges into the building blocks provided that the corresponding partially protected di- or polyamines are available. An array of compounds covering a wide variety of γ-aza substituted analogs of simple neutral amino acids as well as analogs displaying high bulkiness or polycationic side chains was prepared. Two building blocks were incorporated into peptide sequences using microwave-assisted solid-phase peptide synthesis confirming their general utility.
Collapse
|
7
|
Kulshrestha A, Schomaker JM, Holmes D, Staples RJ, Jackson JE, Borhan B. Selectivity in the addition reactions of organometallic reagents to aziridine-2-carboxaldehydes: the effects of protecting groups and substitution patterns. Chemistry 2011; 17:12326-39. [PMID: 21928447 PMCID: PMC4301438 DOI: 10.1002/chem.201101168] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2011] [Indexed: 11/12/2022]
Abstract
Good to excellent stereoselectivity has been found in the addition reactions of Grignard and organozinc reagents to N-protected aziridine-2-carboxaldehydes. Specifically, high syn selectivity was obtained with benzyl-protected cis, tert-butyloxycarbonyl-protected trans, and tosyl-protected 2,3-disubstituted aziridine-2-carboxaldehydes. Furthermore, rate and selectivity effects of ring substituents, temperature, solvent, and Lewis acid and base modifiers were studied. The diastereomeric preference of addition is dominated by the substrate aziridines' substitution pattern and especially the electronic character and conformational preferences of the nitrogen protecting groups. To help rationalize the observed stereochemical outcomes, conformational and electronic structural analyses of a series of model systems representing the various substitution patterns have been explored by density functional calculations at the B3LYP/6-31G* level of theory with the SM8 solvation model to account for solvent effects.
Collapse
Affiliation(s)
- Aman Kulshrestha
- Department of Chemistry, Michigan State University East Lansing, MI 48824 (USA)
| | - Jennifer M. Schomaker
- Department of Chemistry, University of Wisconsin 1101 University Avenue, Madison, WI 53706 (USA)
| | - Daniel Holmes
- Department of Chemistry, Michigan State University East Lansing, MI 48824 (USA)
| | - Richard J. Staples
- Department of Chemistry, Michigan State University East Lansing, MI 48824 (USA)
| | - James E. Jackson
- Department of Chemistry, Michigan State University East Lansing, MI 48824 (USA)
| | - Babak Borhan
- Department of Chemistry, Michigan State University East Lansing, MI 48824 (USA)
| |
Collapse
|
8
|
De Rycke N, David O, Couty F. Assessing the rates of ring-opening of aziridinium and azetidinium ions: a dramatic ring size effect. Org Lett 2011; 13:1836-9. [PMID: 21384826 DOI: 10.1021/ol200348k] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Rates for the ring-opening of aziridinium and azetidinium ions by DMAP were measured. The four-membered ring appears to be ca. 17,000 times less reactive compared to the three-membered ring but is still highly relevant from a synthetic viewpoint. The electrophilicity of these strained ammonium ions is measured for the first time.
Collapse
Affiliation(s)
- Nicolas De Rycke
- Institut Lavoisier-Versailles, UMR 8180, Université de Versailles St-Quentin-en-Yvelines, 45 avenue des Etats-Unis, 78035 Versailles Cedex, France
| | | | | |
Collapse
|
9
|
Belen’kii L, Gramenitskaya V, Evdokimenkova Y. The Literature of Heterocyclic Chemistry, Part X, 2005–2007. ADVANCES IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/b978-0-12-385464-3.00001-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
10
|
Solá TM, Churcher I, Lewis W, Stockman RA. Stereoselective aza-Darzens reactions of tert-butanesulfinimines: convenient access to chiral aziridines. Org Biomol Chem 2011; 9:5034-5. [DOI: 10.1039/c1ob05561e] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
11
|
Mukherjee M, Gupta AK, Lu Z, Zhang Y, Wulff WD. Seeking passe-partout in the catalytic asymmetric aziridination of imines: evolving toward substrate generality for a single chemzyme. J Org Chem 2010; 75:5643-60. [PMID: 20704436 DOI: 10.1021/jo101160c] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The asymmetric catalytic aziridination reaction (AZ reaction) of imines derived from dianisylmethyl (DAM) amine and tetra-methyldianisylmethyl (MEDAM) amine were examined with boroxinate catalysts prepared from both the VANOL and VAPOL ligands. This included an evaluation of different protocols for the preparation of the catalyst. The AZ reaction of DAM and MEDAM imines prepared from nine different aryl and aliphatic aldehydes were examined. The MEDAM imines were superior to the DAM imines in the AZ reaction, giving much higher asymmetric inductions and higher overall yields of aziridines. The MEDAM imines were found to also be superior to the previously studied diphenylmethyl (benzhydryl or Bh) and tetra-tert-butyldianisylmethyl (BUDAM) imines especially for imines derived from aliphatic aldehydes. The average asymmetric induction over the nine different MEDAM imines studied was 97% ee with the VAPOL catalyst and 96% ee with the VANOL catalyst. The MEDAM imines can be deprotected to give N-H aziridines in all cases except for some electron-rich aryl aldehydes. The MEDAM imines are much more reactive than benzhydryl imines, and this was most evident when a diazoacetate ester is replaced by a diazoacetamide. The less reactive diazoacetamides give very low yields in their reactions with benzhydryl imines but high yields with MEDAM imines.
Collapse
Affiliation(s)
- Munmun Mukherjee
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | | | | | | | | |
Collapse
|
12
|
Morán-Ramallal R, Liz R, Gotor V. Enantiopure trans-3-Arylaziridine-2-carboxamides: Preparation by Bacterial Hydrolysis and Ring-Openings toward Enantiopure, Unnatural d-α-Amino Acids. J Org Chem 2010; 75:6614-24. [DOI: 10.1021/jo101377j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Roberto Morán-Ramallal
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Ramón Liz
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Vicente Gotor
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, E-33071 Oviedo, Spain
| |
Collapse
|
13
|
Ottesen LK, Jaroszewski JW, Franzyk H. Ring Opening of a Resin-Bound Chiral Aziridine with Phenol Nucleophiles. J Org Chem 2010; 75:4983-91. [DOI: 10.1021/jo100505c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lars K. Ottesen
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Jerzy W. Jaroszewski
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Henrik Franzyk
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| |
Collapse
|
14
|
Colpaert F, Mangelinckx S, Leemans E, Denolf B, De Kimpe N. Asymmetric synthesis of new chiral N-sulfinyl 2,2-disubstituted aziridines by Grignard additions across α-chloro N-sulfinyl ketimines. Org Biomol Chem 2010; 8:3251-8. [DOI: 10.1039/c001471k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Medjahdi M, González-Gómez JC, Foubelo F, Yus M. Stereoselective synthesis of azetidines and pyrrolidines from N-tert-butylsulfonyl(2-aminoalkyl)oxiranes. J Org Chem 2009; 74:7859-65. [PMID: 19764731 DOI: 10.1021/jo9016666] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Base-induced cyclization of enantiopure (2-aminoalkyl)oxiranes allowed the stereospecific formation of pyrrolidin-3-ols and/or 2-(hydroxymethyl)azetidines, depending on the reaction conditions. The oxidation of 2-(hydroxymethyl)azetidines led to azetidine-2-carboxylic acids in high yields.
Collapse
Affiliation(s)
- Mohamed Medjahdi
- Departamento de Química Orgánica, Facultad de Ciencias and Instituto de Síntesis Orgánica, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | | | | | | |
Collapse
|
16
|
Chouhan G, Alper H. Domino Ring-Opening/Carboxamidation Reactions of N-Tosyl Aziridines and 2-Halophenols/Pyridinol: Efficient Synthesis of 1,4-Benzo- and Pyrido-oxazepinones. Org Lett 2009; 12:192-5. [DOI: 10.1021/ol902598d] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gagan Chouhan
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada, K1N 6N5
| | - Howard Alper
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada, K1N 6N5
| |
Collapse
|
17
|
Paasche A, Arnone M, Fink RF, Schirmeister T, Engels B. Origin of the reactivity differences of substituted aziridines: CN vs CC bond breakages. J Org Chem 2009; 74:5244-9. [PMID: 19719251 DOI: 10.1021/jo900505q] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Aziridines are broadly used as starting materials for various chemical syntheses, and the underlying reactions (CN vs CC bond breaking accompanied by an attack of a nucleophile or a dipolarophile) are strongly influenced by the substitution pattern. The present study investigates reaction courses of possible ring-opening reactions accompanied by the attack of a nucleophile for different substitution patterns of the aziridine. Information is obtained through the computation of the underlying potential energy surfaces and reaction paths. The results provide insight into the mechanisms of different ring-opening reactions and explain how the kinetics and thermodynamics of the reaction are influenced by substituents. This allows predicting substitution patterns that steer the reaction course to either CN or CC bond cleavage.
Collapse
Affiliation(s)
- Alexander Paasche
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg D-97074, Germany
| | | | | | | | | |
Collapse
|
18
|
Ciogli A, Fioravanti S, Gasparrini F, Pellacani L, Rizzato E, Spinelli D, Tardella PA. An Unexpected Highly Stereoselective Bisaziridination of (E,E)-1,4-Dialkyl-2,3-dinitrobutadienes Followed by a Nitro Group Driven Ring Enlargement. J Org Chem 2009; 74:9314-8. [DOI: 10.1021/jo902112j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Egon Rizzato
- Dipartimento di Chimica “G. Ciamician”, Università degli Studi, Via Selmi 2, I-40126 Bologna, Italy
| | - Domenico Spinelli
- Dipartimento di Chimica “G. Ciamician”, Università degli Studi, Via Selmi 2, I-40126 Bologna, Italy
| | | |
Collapse
|
19
|
Bergmeier SC, Lapinsky DJ. Chapter 3: Three-membered ring systems. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s0959-6380(09)70007-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
|
20
|
Dolle RE, Bourdonnec BL, Goodman AJ, Morales GA, Thomas CJ, Zhang W. Comprehensive Survey of Chemical Libraries for Drug Discovery and Chemical Biology: 2007. ACTA ACUST UNITED AC 2008; 10:753-802. [PMID: 18991466 DOI: 10.1021/cc800119z] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Roland E. Dolle
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Bertrand Le Bourdonnec
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Allan J. Goodman
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Guillermo A. Morales
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Craig J. Thomas
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Wei Zhang
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| |
Collapse
|
21
|
Hodgson DM, Hughes SP, Thompson AL, Heightman TD. Terminal aziridines by alpha-deprotonation/electrophile trapping of N-protected aziridine. Org Lett 2008; 10:3453-6. [PMID: 18613698 DOI: 10.1021/ol801224g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
N-tert-Butylsulfonyl and N-tert-butylsulfinyl aziridine undergo alpha-lithiation/electrophile trapping providing a new entry to terminal aziridines. With N-tert-butylsulfinyl aziridine complete asymmetric induction is observed alpha to nitrogen.
Collapse
Affiliation(s)
- David M Hodgson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.
| | | | | | | |
Collapse
|
22
|
Chen HY, Kulkarni MV, Chen CH, Sun CM. Synthesis of structurally diverse benzimidazolyl benzimidazolones by application of soluble polymer support. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.04.081] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
23
|
Crestey F, Witt M, Frydenvang K, Stærk D, Jaroszewski JW, Franzyk H. Microwave-Assisted Ring-Opening of Activated Aziridines with Resin-Bound Amines. J Org Chem 2008; 73:3566-9. [DOI: 10.1021/jo702612u] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- François Crestey
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
| | - Matthias Witt
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
| | - Karla Frydenvang
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
| | - Dan Stærk
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
| | - Jerzy W. Jaroszewski
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
| | - Henrik Franzyk
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
| |
Collapse
|
24
|
|
25
|
Wynne EL, Clarkson GJ, Shipman M. Stereocontrolled approach to 1-azabicyclo[4.1.0]heptanes: application to the synthesis of trans-2,6-disubstituted piperidines. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.11.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|