41730-79-4Relevant academic research and scientific papers
Synthesis of oxazolidin-2-ones and imidazolidin-2-ones directly from 1,3-diols or 3-amino alcohols using iodobenzene dichloride and sodium azide
He, Tian,Gao, Wen-Chao,Wang, Wei-Kun,Zhang, Chi
, p. 1113 - 1118 (2014/04/03)
A general and efficient method for the synthesis of oxazolidin-2-ones and imidazolidin-2-ones directly from 1,3-diols and 3-amino alcohols has been developed using the same reagent combination of iodobenzene dichloride (PhICl2) and sodium azide (NaN3).
Mezlocillin: A Penicillin from the Acylureido Series / Synthesis and chemical properties
Koenig, H.-B.,Metzger, K. G.,Offe, H.-A.,Schroeck, W.
, p. 88 - 90 (2007/10/02)
Mezlocillin, 6--penicillanic acid, is a new semisynthetic acylureido-penicillin with a broad spectrum of antibacterial activity.The synthesis of mezlocillin from ampicillin and the from 6-aminopenicillanic acid and the physico-chemical properties are described.Mezlocillin is cleaved by penicillinase to the penicilloate which is degraded further by acids to the penilloate. - Key words: Acylureido series; Mezlocillin, chemical properties, synthesis; Penicillins
Nitroimidazoles: Part IV - 1-Sulphonyl(carbamoyl/thiocarbamoyl)-3-(1-methyl-5-nitroimidazol-2-yl)-2-imidazolidinones
Nagarajan, K.,Arya, V. P.,George, T.,Sudarsanam, V.,Shah, R. K.,et al.
, p. 928 - 940 (2007/10/02)
Sulphone (5) is condensed with sodium salts of a variety of 1-suplphonyl (7), 1-thiocarbamoyl (9) and 1-carbonyl (10)-2-imidazolidinones to give 3-(2-imidazolyl)imidazolidinones (12), (13) and (14) respectively, out of which 1-methylsulphonyl-3-(1-methyl-5-nitro-imidazol-2-yl)-2-imidazolidinone (12a) is undergoing clinical trials as an antiamoebic-antitrichomonal agent. 15 and 16 are analougous imidazolidinones, while 17 and 18 are benzimidazolone derivatives.The reaction of 5 with the sodium salt of 2-imidazolidinone gives rise to the mono and bis-condensation products 21 and 22 respectively.Several other minor byproducts, 23-27 have been identified. 23, 26 and 27 arise from 21. 24, a transformation product of 5 leads to the ether 25 by a displacement reaction.A second synthesis of 12a involves the nitration of imidazolylimidazolidinone (30) in the terminal step, with 30 becoming available from 1-methyl-2-aminoimidazole (28) and chloroethyl isocyanate, and subsequent reaction of resultant 29 with methanesulphonyl chloride.The higher ring homologue, 33 of 12a is synthesised in poor yield from 5 and 1-methylsulphonylhexahydropyrimidinone.Treatment of 12a and 13a with KI in DMF leads to the isomeric 4-nitro derivatives 38a, b and desmethyl derivates 37a, b.Treatment of 12a with triethyloxonium fluoroborate affords the quaternary isothiourea (35) which is hydrolysed to 36.Treatment of 12a and 13a with aqeous alkali leads to cleavage of imidazolidinone ring to form the ethylenediamines 31a and b.Position isomers 41 and 43 of 12a are respetcively obtained by the reaction of 1-methyl-4-nitro-5-chloro-(40)-, and 1-methyl-5-nitro-4-chloro-(42)-imidazoles with 1-methylsulphonyl-ethylene urea.Treatment of the last compound with various reactive halides, e.g. 2-chlorobenzothiazole, yields several analogues 44a-i of 12a while niridazole (45) and methylsulphonyl chloride affords nitrothiazole analogue 46.
Penicillins
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, (2008/06/13)
Arylmethyl- and cyclohexenylmethyl- penicillins, substituted on the α-carbon atom of the side chain by a 2,3-disubstituted imidazolidinylcarbamido or a 2,3-disubstituted imidazolidinylthiocarbamido group, or by the corresponding 2,3-disubstituted 1,3-diazacyclohexylcarbamido or thiocarbamido groups are anti-bacterial agents.
