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Köster R, Kucznierz R. Sulfidierung ausgewählter Carbonsäure- und Kohlensäureamide mit dem (9-BBN)2S-Reagenz. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/jlac.1992199201177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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202
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Abstract
Aminoxyl radicals are formed in high yield in the reaction between penicillins and hydrogen peroxide in water solutions in the pH range between 7 and 8. The nine-line EPR spectrum, 3 x 3 (1:2:1), indicated an interaction of the unpaired electron with one 14N nucleus (aN = 1.44 mT) and two equivalent hydrogen nuclei (aH = 2.00 mT). The reaction involves an oxidative cleavage of the beta-lactam ring of the penicillins with the formation of a cyclic aminoxyl radical, in which the thiazolidine ring carries the nitroxide group (= N-O.). It is suggested that the reaction with the formation of aminoxyl radicals can also take place in vivo in the deactivation of penicillins by metabolically formed hydrogen peroxide.
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Affiliation(s)
- C Lagercrantz
- Department of Medical Physics, University of Göteborg, Sweden
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203
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Shimizu M, Ukaji Y, Tanizaki J, Fujisawa T. Highly Stereodivergent Approach to Both Enantiomers of 4-Substituted β-Lactams via Diastereofacially Controlled Addition of Enolates oft-Butyl Acetate to a Chiral Imine. CHEM LETT 1992. [DOI: 10.1246/cl.1992.1349] [Citation(s) in RCA: 10] [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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204
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Fujisawa T, Ukaji Y, Noro T, Date K, Shimizu M. Diastereoface-discrimination reaction of lithium or titanium ester enolates with a chiral imine leading to stereodivergent synthesis of β-lactams. Tetrahedron 1992. [DOI: 10.1016/0040-4020(92)80013-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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205
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Danelon GO, Mascaretti OA. Fluorinated penicillins and other β-lactams: chemistry and biological activity. J Fluor Chem 1992. [DOI: 10.1016/s0022-1139(00)81095-7] [Citation(s) in RCA: 25] [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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206
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Kita Y, Shibata N, Tohjo T, Yoshida N. Chemistry of O-silylated ketene acetals: an efficient synthesis of carbapenem and 1β-methylcarbapenem intermediates. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p19920001795] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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207
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Nangia A. AM1 calculations on a series of bicyclic azetidin-2-ones and bicyclic 1,3-diazetidin-2-ones: investigations towards putative β-lactamase inactivators. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0166-1280(91)85147-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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208
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β-Lactams from ester enolates and silylimines: An enantiospecific synthesis of monocyclic β-lactams. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)86509-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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209
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Synthetic β-lactam antibiotics V. Antibacterial activity of some 7β-[2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido]-3-(quinolinium)thiomethylcephalosporins. Arch Pharm Res 1991. [DOI: 10.1007/bf02876869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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210
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Japelj M, Vitezic N. Some Aspects in the Industrial Synthesis of β—Lactam Antibiotics. BIOTECHNOL BIOTEC EQ 1991. [DOI: 10.1080/13102818.1991.10818628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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212
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Brown P, Calvert SH, Chapman PCA, Cosham SC, Eglington AJ, Elliot RL, Harris MA, Hinks JD, Lowther J, Merrikin DJ, Pearson MJ, Ponsford RJ, Syms JV. β-Lactamase-stable penicillins. Synthesis and structure–activity relationships of (Z)-alkyloxyimino penicillins; selection of BRL 44154. ACTA ACUST UNITED AC 1991. [DOI: 10.1039/p19910000881] [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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213
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A concise formal approach to the oxacephem skeleton from an intramolecular Peterson type olefination of N-[bis(trimethylsilyl)methyl]-β-lactams. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)98818-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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214
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215
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Barton DHR, Gateau-Olesker A, Anaya-Mateos J, Cléophax J, Géro SD, Chiaroni A, Riche C. Asymmetric synthesis of 1,3,4-trisubstituted and 3,4-disubstituted 2-azetidinones: strategy based on use ofD-glucosamine as a chiral auxiliary in the Staudinger reaction. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/p19900003211] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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216
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218
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219
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Palomo C, Ontoria JM, Odriozola JM, Alzpurua JM, Ganboa I. The acid chloride–iminoester condensation: a direct approach to PS-5 and PS-6 intermediates and related compounds. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/c39900000248] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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220
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Kobayashi Y, Ito Y, Terashima S. A Novel Use of the Ionic Hydrosilation in the Synthesis of Carbapenem Key Intermediate. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1989. [DOI: 10.1246/bcsj.62.3041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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221
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Moratal JM, Borrás J, Donaire A, Martínez MJ. Coordinating properties of the Cephalexine antibiotic. A potentiometric study of the complexes formation between Cephalexine and Co(II), Ni(II) and Cu(II) metal ions. Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)83128-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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222
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Studies toward the total synthesis of 1-oxacephalosporins 1: 3-amino-4-thio-2-azetidinones with protected γ.γ'-dihydroxyalkenoate side chain. Tetrahedron 1989. [DOI: 10.1016/0040-4020(89)80098-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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223
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Ito Y, Kobayashi Y, Kawabata T, Takase M, Terashima S. Novel syntheses of the carbapenem key intermediates, (3R,4R)-4-acetoxy-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone and (3S,4R)-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-4-carboxymethyl-2-azetidinone, from (S)-ethyl lactate. Tetrahedron 1989. [DOI: 10.1016/s0040-4020(01)89105-5] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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225
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Synthesis and biological evaluation of new C (4) heterofunctionalized monocyclic β-lactams derived from penicillin G. Eur J Med Chem 1988. [DOI: 10.1016/0223-5234(88)90100-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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226
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Fritz H, Henlin JM, Tschamber T, Streith J, Riesen A, Zehnder M. Stereospecific Synthesis of 2-Oxazinyl-4-oxoazetidinecarbamates Starting from a 1,2-Diazepine. A new type of intramolecular transbenzoylation. Helv Chim Acta 1988. [DOI: 10.1002/hlca.19880710418] [Citation(s) in RCA: 15] [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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227
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Mo studies on β-lactams.- I. On the structure and reactivity of azetidin-2-one with split-valence basis sets. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0166-1280(88)80481-0] [Citation(s) in RCA: 18] [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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228
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DÜRCKHEIMER WALTER, ADAM FRIEDHELM, FISCHER GERD, KIRRSTETTER REINER. Recent Developments in the Field of Cephem Antibiotics. ADVANCES IN DRUG RESEARCH 1988. [DOI: 10.1016/b978-0-12-013317-8.50006-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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229
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Somoza C, Mascaretti OA. Synthesis of optically active (pivaloyloxy)methyl 2',3'-substituted 4'-oxoazetidin-1'-yl-3-methylbut-2-enoates from 6-apa. Tetrahedron 1988. [DOI: 10.1016/s0040-4020(01)86069-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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230
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Kunieda T, Nagamatsu T, Higuchi T, Hirobe M. Highly efficient oxazolone-derived reagents for beta-lactam formation from beta-amino acids. Tetrahedron Lett 1988. [DOI: 10.1016/s0040-4039(00)86712-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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231
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Ito Y, Terashima S. A Synthesis of (3S,4R)-3-[(R)-1-(t-Butyldimethylsilyloxy)ethyl]-4-carboxymethyl-2-azetidinone, the Thienamycin Intermediate, from (S)-Ethyl Lactate. CHEM LETT 1987. [DOI: 10.1246/cl.1987.445] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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232
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Wada M, Aiura H, Akiba KY. A new synthesis of β-lactams from lithium ester enolates andenolizable aldimines. Tetrahedron Lett 1987. [DOI: 10.1016/s0040-4039(00)95517-5] [Citation(s) in RCA: 31] [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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233
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Tufariello JJ, Pinto DJ. A nitrone-based approach to the synthesis of cis-3-amido azetidinones. Tetrahedron Lett 1987. [DOI: 10.1016/s0040-4039(00)96760-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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234
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235
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Ito Y, Kawabata T, Terashima S. A novel synthesis of (3R,4R)-4-acetoxy-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone, the versatile key intermediate of carbapenem synthesis, from (S)-ethyl lactate. Tetrahedron Lett 1986. [DOI: 10.1016/s0040-4039(00)85317-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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