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Dölling K. Synthesis and reactivity of β-stannylated phenylalanines. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2017. [DOI: 10.1515/znb-2017-0060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The free radical hydrostannation of a series of N-benzoyl and N-acetyl dehydrophenylalanine esters 2a
–
h yields β-stannylated phenylalanine derivatives 3 and 4. This addition of tin hydride to such unsaturated compounds simultaneously creates two new chiral centers leading to mixtures of two diastereomeric pairs of enantiomers. The reaction of 3-stannylated phenylalanine 3 with methanolic HCl yields chlorostannyl-substituted compounds 5 and 6 and, with one equivalent of bromine, the bromostannylated compounds 7 and 8 are formed. The bromostannylated phenylalanine derivative 7 reacts with one further equivalent of bromine to produce the dibromostannylated compound 9. Even the chlorostannylated phenylalanine derivative 5 reacts with one further equivalent of HCl to give the dichlorostannylated compound 10. The products were characterized by elemental analysis, infrared (IR), and multinuclear (1H, 13C, 119Sn) nuclear magnetic resonance (NMR) spectroscopy. Attempts were made to assign the preferred conformation of the stannylated phenylalanine derivatives using Karplus-type relationship of coupling constants 3
J(H,H), 3
J(Sn,H), and 3
J(Sn,C=O). The results of these analyses have been confirmed by three crystal structure determinations.
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Affiliation(s)
- Karin Dölling
- Martin-Luther Universität Halle-Wittenberg , Biozentrum, 06099 Halle , Germany
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2
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Rehman W, Badshah A, Baloch MK, Ali S, Hameed G, Khan KM. Synthesis Characterization and Biological Screening of Tri-benzyl Tin(IV) Complexes of Some Schiff Bases. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200400138] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3
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Experimental and theoretical studies of the triphenyltin(IV) chloride adduct of pyridine-2-ethanol. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Amini MM, Azadmehr A, Alijani V, Khavasi HR, Hajiashrafi T, Kharat AN. Di- and triorganotin(IV) carboxylates derived from triorganotin(IV) iodide with mixed organic groups on tin: Cyclic, hexameric triorganotin(IV) carboxylates. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.04.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Shcherbakov VI, Ivanov EF, Khorshev SY, Feldman MS, Kopytov EB, Konkina TN. Trialkyltin Derivatives of N-Phthaloyl-Protected Amino Acids. ACTA ACUST UNITED AC 1991. [DOI: 10.1080/15533179108020628] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Ruisi G, Giudice MTL. Synthesis and spectroscopic characterization of organotin derivatives ofN-benzoylglycylglycine. Appl Organomet Chem 1991. [DOI: 10.1002/aoc.590050504] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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D�lling K, Hartung H, Schollmeyer D, Weichmann H. Synthese und Reaktivit�t 3-triorganostannylsubstituierter Alaninderivate Kristallstruktur von 3-(Diphenylchlorostannyl)-N-acetylalaninethylester. Z Anorg Allg Chem 1991. [DOI: 10.1002/zaac.19916000121] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Sandhu GK, Kaur H. Preparation and characterization of diphenyllead(IV) and triphenyllead(IV) complexes withN-protected amino-acids and the dipeptides. Appl Organomet Chem 1990. [DOI: 10.1002/aoc.590040407] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Preparation, IR and 1H NMR spectral studies of triorganotin(IV) complexes of N-benzoylglycine and N-benzoylglycylglycine. J Organomet Chem 1990. [DOI: 10.1016/0022-328x(90)85347-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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