164520-07-4Relevant academic research and scientific papers
Pyrimido[5,4-e][1,2,4]triazine-5,7(1H,6H)-dione derivatives as novel small molecule chaperone amplifiers
Zhou, Yuefen,Wei, Linyi,Brady, Thomas P.,Murali Mohan Redddy,Nguyen, Tram,Chen, Jinhua,Au, Qingyan,Yoon, Il Sang,Yip, Gary,Zhang, Bin,Barber, Jack R.,Ng, Shi Chung
experimental part, p. 4303 - 4307 (2010/05/18)
Pyrimido[5,4-e][1,2,4]triazine-5,7(1H,6H)-dione derivatives were investigated as novel small molecule amplifiers of heat shock factor 1 transcriptional activity. Lead optimization led to the discovery of compound 4A-13, which displayed potent HSF1 activit
Pyrimido[5,4-e][1,2,4]triazine-5,7-diones, processes for preparing them and their use
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Page 12, (2008/06/13)
The invention relates to pyrimido[5,4-e][1,2,4]triazine-5,7-diones, pharmaceutically acceptable salts thereof and physiologically functional derivatives. The invention therefore relates to compounds of the formula I, in which the radicals have the given meanings, and to their physiologically tolerated salts and processes for preparing them. The compounds are suitable for use as antidiabetics, for example.
General syntheses of 1-alkyltoxoflavin and 8-alkylfervenulin derivatives of biological significance by the regioselective alkylation of reumycin derivatives and the rates of transalkylation from 1-alkyltoxoflavins into nucleophiles
Nagamatsu, Tomohisa,Yamasaki, Hirofumi
, p. 130 - 137 (2007/10/03)
Regioselective alkylations of reumycin derivatives under alkaline conditions with a dialkyl sulfate or alkyl halide in 1,4-dioxane or DMF to provide 1-alkyltoxoflavin or 8-alkylfervenulin derivatives of biological significance, are described. Namely, the primary and secondary alkylations of reumycin derivatives with appropriate dialkyl sulfates or alkyl bromides under alkaline conditions in 1,4-dioxane gave predominantly 1-alkyltoxoflavin derivatives, while the same alkylations in DMF instead of 1,4-dioxane gave predominantly 8-alkylfervenulin derivatives. In the case of tertiary alkylation, the reumycin derivative with 2-bromo-2-methylpropane in both solvents under the same conditions yielded only the 1-alkyltoxoflavin derivative. Moreover, the rates of transalkylation from 1-alkyltoxoflavin derivatives into nucleophiles, e.g. DMF and n-butylamine, are also described. That is, the toxoflavin derivatives possessing a primary alkyl group at the 1-position were easily dealkylated from the 1-position by heating with DMF, whereupon reumycin (i.e., 1-dealkyltoxoflavin, 8-dealkylfervenulin) derivatives were formed. In other words, transalkylation from the toxoflavin derivatives into DMF took place, However, the transalkylation of 1-alkyltoxoflavin derivatives possessing a secondary or tertiary alkyl group at the 1-position was not observed under such conditions. On the other hand, when heating 1-alkyltoxoflavin derivatives with n-butylamine in 1,4-dioxane, the transalkylations were more easily observed even in the case of 1-alkyltoxoflavin derivatives substituted by a tertiary alkyl group.
Facile and general syntheses of 1-alkyltoxoflavin and 8-alkylfervenulin derivatives of biological significance by the regiospecific alkylation of reumycin (1-demethyltoxoflavin, 8-demethylfervenulin) derivatives
Nagamatsu, Tomohisa,Yamasaki, Hirofumi
, p. 643 - 650 (2007/10/03)
Regiospecific alkylation of reumycins (6) under alkaline conditions with a dialkyl sulfate or alkyl halide in dioxane and in DMF to provide 1-alkyltoxoflavins (5) of biological significance and 8-alkylfervenulins (7), respectively, is described.
