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Serra M, Peviani EG, Bernardi E, Colombo L. Synthesis of Variously Functionalized Azabicycloalkane Scaffolds by Domino Metathesis Reactions. J Org Chem 2017; 82:11091-11101. [PMID: 28953382 DOI: 10.1021/acs.joc.7b02047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
7,5-Fused azabicycloalkane scaffolds, carrying a quaternary stereocenter at C3 position of the lactam ring, can act as effective reverse-turn mimics and have proven to be useful intermediates for the preparation of Arg-Gly-Asp (RGD)-based cyclopentapeptides (cRGD) with nanomolar activity as αvβ3/αvβ5 integrin antagonists. Here, we report the synthesis of new azabicycloalkane scaffolds endowed at the C6 position with a para-substituted phenethyl side chain, which could be exploited to obtain cRGD-based bioconjugates that may find promising applications in anticancer therapy. By performing a domino cross enyne metathesis/ring-closing metathesis (CEYM/RCM) in the presence of styrene derivatives, followed by catalytic hydrogenation of the diene system, we easily converted a dipeptide precursor into the desired C6-functionalized azabicycloalkane scaffolds. The presence of a suitably protected p-amino group on the styrene moiety could be exploited, after deprotection, either to directly conjugate a bioactive compound or to introduce a suitable spacer between the cRGD unit and the bioactive compound.
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Affiliation(s)
- Massimo Serra
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia , Viale Taramelli 12, 27100 Pavia, Italy
| | - Elena Giulia Peviani
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia , Viale Taramelli 12, 27100 Pavia, Italy
| | - Eric Bernardi
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia , Viale Taramelli 12, 27100 Pavia, Italy
| | - Lino Colombo
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia , Viale Taramelli 12, 27100 Pavia, Italy
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Serra M, Tambini SM, Di Giacomo M, Peviani EG, Belvisi L, Colombo L. Synthesis of Easy-to-Functionalize Azabicycloalkane Scaffolds as Dipeptide Turn Mimics en Route to cRGD-Based Bioconjugates. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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3
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Screening of a library of 4-aryl/heteroaryl-4H-fused pyrans for xanthine oxidase inhibition: synthesis, biological evaluation and docking studies. Med Chem Res 2015. [DOI: 10.1007/s00044-015-1382-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Aillard B, Kilburn JD, Blaydes JP, Tizzard GJ, Findlow S, Werner JM, Bloodworth S. Synthesis and evaluation of a (3R,6S,9S)-2-oxo-1-azabicyclo[4.3.0]nonane scaffold as a mimic of Xaa-trans-Pro in poly-l-proline type II helix conformation. Org Biomol Chem 2015; 13:4562-9. [DOI: 10.1039/c5ob00180c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Stereoselective synthesis of a (3R,6S,9S)-2-oxo-1-azabicyclo[4.3.0]nonane mimic of Xaa-trans-Pro in poly-l-proline type II helix conformation is reported.
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Affiliation(s)
- Boris Aillard
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton
- UK
| | - Jeremy D. Kilburn
- School of Biological and Chemical Sciences
- Queen Mary
- University of London
- London
- UK
| | - Jeremy P. Blaydes
- Cancer Sciences
- Faculty of Medicine
- University of Southampton
- Southampton
- UK
| | - Graham J. Tizzard
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton
- UK
| | - Stuart Findlow
- Centre for Biological Sciences
- University of Southampton
- Southampton
- UK
| | - Jörn M. Werner
- Centre for Biological Sciences
- University of Southampton
- Southampton
- UK
| | - Sally Bloodworth
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton
- UK
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5
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Heescher C, Schollmeyer D, Nubbemeyer U. 1,2-Asymmetric Induction in Diastereoselective Zwitterionic Aza-Claisen Rearrangements: Key Steps in Optically Active Alkaloid Synthesis. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300389] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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6
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Chaubet G, Coursindel T, Morelli X, Betzi S, Roche P, Guari Y, Lebrun A, Toupet L, Collette Y, Parrot I, Martinez J. Stereoselective synthesis of original spirolactams displaying promising folded structures. Org Biomol Chem 2013; 11:4719-26. [DOI: 10.1039/c3ob40643a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Xu HC, Moeller KD. Intramolecular anodic olefin coupling reactions: use of the reaction rate to control substrate/product selectivity. Angew Chem Int Ed Engl 2011; 49:8004-7. [PMID: 20839207 DOI: 10.1002/anie.201003924] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hai-Chao Xu
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, USA
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8
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Xu HC, Moeller KD. Intramolecular hydroamination of dithioketene acetals: an easy route to cyclic amino acid derivatives. Org Lett 2010; 12:5174-7. [PMID: 20945849 DOI: 10.1021/ol102193x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Catalytic intramolecular hydroamination of dithioketene acetals was developed for the synthesis of cyclic amino acid derivatives. Triggered by the addition of a catalytical amount of n-BuLi, the reaction proceeds to give proline and pipecolic acid derivatives in excellent yields and diastereoselectivity.
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Affiliation(s)
- Hai-Chao Xu
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
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9
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Xu HC, Moeller KD. Intramolecular Anodic Olefin Coupling Reactions: Use of the Reaction Rate To Control Substrate/Product Selectivity. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003924] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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10
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Xu HC, Moeller KD. Intramolecular anodic olefin coupling reactions and the synthesis of cyclic amines. J Am Chem Soc 2010; 132:2839-44. [PMID: 20131795 PMCID: PMC3950632 DOI: 10.1021/ja910586v] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Anodic olefin coupling reactions using a tosylamine trapping group have been studied. The cyclizations are favored by the use of a less-polar radical cation and more basic reaction conditions. The most significant factor for obtaining good yields of cyclic product is the use of the more basic reaction conditions. However, a number of factors including the nature of both the solvent and the electrolyte used can influence the yield of the cyclizations. The cyclizations allow for the rapid synthesis of both substituted proline and pipecolic acid type derivatives.
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Affiliation(s)
- Hai-Chao Xu
- Department of Chemistry, Washington University, St. Louis, Missouri 63130
| | - Kevin D. Moeller
- Department of Chemistry, Washington University, St. Louis, Missouri 63130
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11
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Li X, Curran DP. Diverging chemoselective reactions of separable amide rotational isomers. Org Lett 2010; 12:612-4. [PMID: 20038129 DOI: 10.1021/ol902808m] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Diverging chemoselective reactions of a pair of amide rotamers have been observed by separating the rotamers and then reacting them individually. Reduction of (Z)-N-allyl-2-(phenylselanyl)-N-(2,4,6-tri-tert-butylphenyl)acetamide with tributyltin hydride at room temperature provides only the product of 5-exo cyclization, 4-methyl-1-(2,4,6-tri-tert-butylphenyl)pyrrolidin-2-one. In contrast, reduction of the corresponding (E) amide rotational isomer under identical conditions provides only the reduced product, (E)-N-allyl-N-(2,4,6-tri-tert-butylphenyl)acetamide. Such diverging reactions of rotamers may be common in transformations involving reactive intermediates (carbenes, radicals, organometallic intermediates) that have low barriers to onward reactions relative to amide rotation.
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Affiliation(s)
- Xiben Li
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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12
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Chiba K, Sugihara M, Yoshida K, Mikami Y, Kim S. Synthesis of hydrophobic phase-tagged prolyl peptides featuring rapid reaction/separation. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.07.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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14
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Lesma G, Colombo A, Sacchetti A, Silvani A. Olefin Metathesis Based Approach to Diversely Functionalized Pyrrolizidines and Indolizidines; Total Synthesis of (+)-Monomorine. J Org Chem 2008; 74:590-6. [DOI: 10.1021/jo801638u] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giordano Lesma
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano, via G. Venezian 21, 20133 Milano, Italy
| | - Alessia Colombo
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano, via G. Venezian 21, 20133 Milano, Italy
| | - Alessandro Sacchetti
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano, via G. Venezian 21, 20133 Milano, Italy
| | - Alessandra Silvani
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano, via G. Venezian 21, 20133 Milano, Italy
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15
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Lesma G, Colombo A, Sacchetti A, Silvani A. A new spirocyclic proline-based lactam as efficient type II′ β-turn inducing peptidomimetic. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.10.072] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Arosio D, Belvisi L, Colombo L, Colombo M, Invernizzi D, Manzoni L, Potenza D, Serra M, Castorina M, Pisano C, Scolastico C. A Potent Integrin Antagonist from a Small Library of Cyclic RGD Pentapeptide Mimics Including Benzyl-Substituted Azabicycloalkane Amino Acids. ChemMedChem 2008; 3:1589-603. [DOI: 10.1002/cmdc.200800143] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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17
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Kesselring D, Maurer K, Moeller KD. Building Addressable Libraries: Site-Selective Formation of an N-Acyliminium Ion Intermediate. Org Lett 2008; 10:2501-4. [DOI: 10.1021/ol8007827] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Kesselring
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
| | - Karl Maurer
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
| | - Kevin D. Moeller
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
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18
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Di Giacomo M, Vinci V, Serra M, Colombo L. New fast and practical method for the enantioselective synthesis of α-vinyl, α-alkyl quaternary α-amino acids. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2007.12.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Trabocchi A, Lalli C, Guarna F, Guarna A. Diastereoselective Synthesis of Highly Constrained Spiro-β-Lactams by the Staudinger Reaction Using an Unsymmetrical Bicyclic Ketene. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700260] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Sośnicki JG. Convenient approach to tetrahydro-quinolizin-4-ones by sequential addition of lithium allyldibutylmagnesate to N-allylpyridin-2-ones and ring-closing metathesis reactions. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.07.072] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Alcaro MC, Vinci V, D'Ursi AM, Scrima M, Chelli M, Giuliani S, Meini S, Di Giacomo M, Colombo L, Papini AM. Bradykinin antagonists modified with dipeptide mimetic β-turn inducers. Bioorg Med Chem Lett 2006; 16:2387-90. [PMID: 16504505 DOI: 10.1016/j.bmcl.2006.01.125] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2005] [Revised: 01/27/2006] [Accepted: 01/27/2006] [Indexed: 11/21/2022]
Abstract
Bradykinin (BK) is involved in a wide variety of pathophysiological processes. Potent BK peptide antagonists can be developed introducing constrained unnatural amino acids, necessary to force the secondary structure of the molecule. In this paper, we report a structure-activity relationship study of two peptide analogues of the potent B2 antagonist HOE 140 by replacing the D-Tic-Oic dipeptide with conformationally constrained dipeptide mimetic beta-turn inducers.
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Affiliation(s)
- Maria C Alcaro
- Laboratory of Peptide and Protein Chemistry and Biology, Dipartimento di Chimica Organica, University of Firenze and CNR-ICCOM, Polo Scientifico, Via della Lastruccia 13, I-50019 Sesto Fiorentino (FI), Italy
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22
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23
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Børsting P, Christensen MS, Steffansen SI, Nielsen P. Synthesis of dinucleotides with 2′-C to phosphate connections by ring-closing metathesis. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.10.074] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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25
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Harris PWR, Brimble MA. Synthesis of macrocyclic analogues of the neuroprotective agent glycyl-l-prolyl-l-glutamic acid (GPE). Org Biomol Chem 2006; 4:2696-709. [PMID: 16826294 DOI: 10.1039/b605293b] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses of seven macrocyclic analogues of the neuroprotective tripeptide glycyl-L-prolyl-L-glutamic acid (GPE) are described. Macrocycles 6 and 7 mimic the cis conformer of GPE whereas macrocycles 2-5, 8, and 9 mimic the trans conformer of GPE. The macrocyclic peptides of well-defined geometry were prepared via Grubbs ring closing metathesis of an appropriate diene precursor. In turn each of the diene precursors were prepared from the readily available allyl-substituted amino acid building blocks 12, 13, 14, 27, 36 and 51.
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Affiliation(s)
- Paul W R Harris
- Department of Chemistry, University of Auckland, 23 Symonds St., Auckland, New Zealand
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26
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Maechling S, Norman SE, McKendrick JE, Basra S, Köppner K, Blechert S. Ring-rearrangement metathesis of bicyclic amino acid derivatives. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.10.155] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Hanessian S, Tremblay M, Marzi M, Del Valle JR. Synthetic studies in the intramolecular carbocyclization of N-acyloxyiminium ions. Stereoelectronic and steric implications of nucleophilic alkene, alkyne, and allene tethers. J Org Chem 2005; 70:5070-85. [PMID: 15960507 DOI: 10.1021/jo050326w] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
N-Acyloxyiminium ions generated from 4-substituted l-pyroglutamic esters with 4-(3-butenyl), 4-(3-butynyl), 4-(3-cinnamylmethyl), and 4-allenic tethers undergo rapid Lewis acid mediated carbocyclization to give stereodefined azacyclic compounds depending on the nature of the nucleophilic tether. In general, reactions of alkenes and alkynes with terminal alkyl or aryl substituents, as well as allenes, proceed through transient vinylic carbocations that are attacked internally by the N-Boc group to give tricyclic dihydrooxazinones. Diastereotopic bis-4-(3-butenyl) and 4-(3-butynyl) tethers undergo stereochemically controlled attack favoring an antiperiplanar rather than synclinal approach to give enantiopure 6-halo octahydroindole-2-carboxylic acids and 6-halo hexahydroindole-2-carboxylic acids as their methyl esters, respectively. The aza bicyclic and tricyclic compounds are excellent scaffolds for diversification.
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Affiliation(s)
- Stephen Hanessian
- Department of Chemistry, Université de Montréal, C.P. 6128, Station Centre-ville, Montréal, Province of Quebec, H3C 3J7 Canada.
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28
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: annual survey covering the year 2003. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2004.10.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Truchot C, Wang Q, Sasaki NA. A New Diastereoselective Synthetic Approach to the Enantiopure Peptidomimetic Scaffold 2-Oxo-1-azabicyclo[4.4.0]decane. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400709] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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30
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Cluzeau J, Lubell WD. Design, synthesis, and application of azabicyclo[X.Y.0]alkanone amino acids as constrained dipeptide surrogates and peptide mimics. Biopolymers 2005; 80:98-150. [PMID: 15795926 DOI: 10.1002/bip.20213] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Azabicyclo[X.Y.0]alkanone amino acids are challenging synthetic targets and useful tools for studying structure-activity relationships of native peptide ligands. They have been employed to increase potency and stability in conformationally rigid enzyme inhibitors and receptor ligands. Since last reviewed in 1997, activity in their synthesis and application has increased significantly and access is now available to a wider diversity of these peptide mimics. This review focuses on recent syntheses of these heterocyclic amino acids and their application in the investigation of biologically active peptides and peptide mimics.
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Affiliation(s)
- Jérôme Cluzeau
- Département de Chimie, Université de Montréal, Montréal H3C 3J7, Québec, Canada
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31
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Ohfune Y, Shinada T, Hamada M, Kawasaki M. Stereoselective Synthesis of 2,5-Di- and 2,2,5-Trisubstituted Pyrrolidines by Allylation Reaction of Acyliminium Ion. HETEROCYCLES 2005. [DOI: 10.3987/com-05-s(k)61] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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32
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Børsting P, Freitag M, Nielsen P. Dinucleotides containing two allyl groups by combinations of allyl phosphotriesters, 5-allyl-, 2′-O-allyl- and 2′-arabino-O-allyl uridine derivatives as substrates for ring-closing metathesis. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.09.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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34
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35
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The first example of ring-closing olefin metathesis of dehydroamino acids: an application to the synthesis of azabicyclo[X.Y.0]alkanes. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.01.126] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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36
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André Sasaki N, Truchot C. Synthesis of Orthogonally Protected Enantiopure 2,9-Diaminodecanedioic Acid: A Model for a New General Method for the Synthesis of Orthogonally Protected α,α’-Diaminodicarboxylic Acids. HETEROCYCLES 2004. [DOI: 10.3987/com-04-s(p)40] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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