Ring cleavage occurred when 1,2,4-triazino-1,2,4-triazines (3), (4) and (5) were treated with concentrated hydrochloric acid to yield N-substituted triazines (7) and (8). These confirm the given configuration assigned to the isomeric triazinotriazines. 6-Methyl-2-phenyl-7H-oxazolo [3,2-b][1,2,4]-triazin-7-one (9) underwent ring cleavage on treatment with sodium alkoxide to afford 3-alkoxy-1...

When a solution containing xylose and L-lysine is heated under weakly acidic conditions, it turns brown by the Maillard reaction. We isolated here two novel yellow compounds from a heated solution containing xylose and lysine, and identified pyrrolyl-methylidene-pyrrolone derivatives named dilysyldipyrrolones A and B. Their chemical structures were elucidated by instrumental analyses as 6-[[1-[...

The synthesis of novel fused heterocycles is based on reactions proceeding by the mechanism of the tert-amino effect, which generalizes cyclization of certain derivatives of 3-methyl-1-phenyl-2-pyrazolin-5-ones. Using this strategy a variety of fused heterocycles is obtained by the Knoevenagel condensation of 5-tert-amino-3-methyl-1-phenylpyrazolone-4-carboxal-dehyde 3 with active methylene com...

4-(acetoacetamido) arsanilic acid (ii), which was then condensed with aryl aldehydes. the resulting product on reaction with hydrazine hydrate and hydroxyl amine hydrochloride yielded pyrazolines (iv) and isoxazolines (v), respectively. the antimicrobial activity of compounds against a number of microorganisms was evaluated. some of these compounds showed significant antimicrobial activity

The title compound is a hydantoin derivative that has been synthesized through three-component reaction of ethyl pyruvate, p-anisidine and phenyl isocyanate. This paper provides comprehensive spectral dataset for the compound, including 1H 13C{1H} NMR, IR, HRMS, X-ray crystallography analyses. A tentative mechanism comprising two complementary pathways provided based on additional experiments w...

The syntheses of the title compounds are described. 1- [[2- Amino -1 - (hydroxymethyl) ethoxy] methyl] uracil exhibitslittleactivity against herpesviruses (HSV) in vivo