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Zusammenfassung Einige neue N-Triäthyl- bzw. N-Triphenylborazinderivate wurden hergestellt und ihre IR-Spektren mit denen bereits bekannter Verbindungen verglichen. Die Frequenzabhängigkeit der B—N-Hauptbande infolge der Art der Substitution an den B-Atomen wird diskutiert.
Herrn Prof. Dr. Dr. h. c.F.Wessely zum 70. Geburtstag gewidmet. 相似文献
Several new N-triethyl- and N-triphenylborazines have been prepared. IR-Spectra are recorded and compared with those of compounds already described. The frequency dependence of the B—N main band upon B-substitution is discussed.
Herrn Prof. Dr. Dr. h. c.F.Wessely zum 70. Geburtstag gewidmet. 相似文献
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The synthesis of variously substituted bis-triazinylhydrazines and their subsequent oxidation preferably with chlorine in a two-phase system to azo-1,3,5-triazines starting from cyanuric chloride is reported. Reaction of ethoxycarbonylhydrazine with cyanuric chloride followed by oxidation gave access to mono- and bis-ethoxycarbonyl-1,3,5-triazines, respectively. Azo-1,3,5-triazines proved to be very reactive dienophiles. 相似文献
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The solid-phase synthesis of 1,3-disubstituted and 1,3,5-trisubstituted 1,3,5-triazine-2,4,6-triones from MBHA and Wang resin is described. Reaction of resin-bound amino acids with isocyanates yield resin-bound ureas, which further react with chlorocarbonyl isocyanate in toluene at 65 degrees C to selectively afford the resin-bound 1,3-disubstituted 1,3,5-triazine-2,4,6-triones. Selective alkylation at the N-5 position of the resin-bound 1,3-disubstituted 1,3,5-triazine-2,4,6-triones was accomplished by treatment with alkyl halides in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). The desired products were cleaved from their solid support and obtained in good yield and purity. The method can be employed in production of toltrazuril analogue libraries for identification of new anticoccidial agents. 相似文献
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Giancarlo Verardo Angelo G. Giumanini Fausto Gorassini Paolo Strazzolini Franco Benetollo Gabriella Bombieri 《Journal of heterocyclic chemistry》1995,32(3):995-1001
1,3,5-Triscubstituted hexahydro-1,3,5-trazin-2-ones 3 are easily obtained by the reaction of 1,3,5-trisub-stituted hexahydro-1,3,5-triazines 1 with organic isocyanates 2 . The reaction is believed to occur by the sequential addition to 2 of two molecules of the monomeric N-methyleneamines in thermal equilibrium with 1. Substituent scrambling at the operating temperature (120°) was negligible. The crystal structure of 1,3,5-triphenylhexahydro-1,3,5-triazin-2-one (3a) has been determined by X-ray diffraction methods. 相似文献
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