Preparation of tetrasubstituted pyrimido[4,5-d]pyrimidine diones
作者:Hui Wang、Chao Wang、Thomas D. Bannister
DOI:10.1016/j.tetlet.2015.02.051
日期:2015.4
A novel synthetic route to 1,3,5,7-tetrasubstituted pyrimido[4,5-d]pyrimidine-2,4-diones, of interest for potential antitumor activity, is reported. The route uses 1,3-disubstituted 6-amino uracils as starting materials. The key step is a hydrazine-induced cyclization reaction to form the fused pyrimidine ring. By choosing different uracils, acylation reagents, and alkylation reagents, substituents
报道了一种潜在的抗肿瘤活性感兴趣的1,3,5,7-四取代嘧啶[4,5 - d ]嘧啶-2,4-二酮的合成途径。该路线以1,3-二取代的6-氨基尿嘧啶为起始原料。关键步骤是肼诱导的环化反应,以形成稠合的嘧啶环。通过选择不同的尿嘧啶,酰化试剂和烷基化试剂,可以选择性地改变N-1,N-3,C-5和C-7处的取代基,以提供结构上多样化的一组化合物用于生物学评估。
Use of 1,3-diisobutyl-8-methylxanthine as a bronchodilator and antiallergy agent
申请人:J. URIACH & CIA. S.A.
公开号:EP0407651A2
公开(公告)日:1991-01-16
The invention relates to the use of 1,3-diisobutyl-8-methylxanthine, or its pharmaceutically acceptable salts, for the treatment or prophylaxis of acute or chronic obstructive airways disease and allergic asthma. The invention also relates to a pharmaceutical composition of an aerosol containing 1,3-diisobutyl-8-methylxanthine, ethanol, sorbitan oleate and one or more freons.
Given the re-emergence of tuberculosis in Europe and beyond, the search for novel bio-active compound classes against this disease is of utmost importance. As a result of a high intrinsic tolerance of the etiological agent, Mycobacterium tuberculosis, towards most antibiotics and xenobiotics, the search for such new compounds is far from trivial. Further exacerbated by the rapid generation and spread of drug resistant M. tuberculosis and fuelled by the HIV/AIDS pandemic, halting the tuberculosis epidemic is of paramount importance. As part of our program to design new 2-aza-anthraquinones with anti-mycobacterial activity, various dialkyltetrahydrobenzo[g]pyrimido[4,5-c]lisoquinolinetetraones were designed and synthesised. The compounds were submitted to a biological evaluation in which the activity against M.tb H37Rv(lux) was observed, as well as the acute toxicity towards J774 A.1 macrophages. From these results, the selectivity index was calculated. Furthermore, the activity of the most promising compounds was further studied against a multi-drug resistant LAM-1 strain and against intracellular replicating M.tb. The study was further extended with a comet assay and a VITOTOX (TM) assay to investigate the possibility of observable genotoxic effects caused by these compounds. (C) 2014 Elsevier Masson SAS. All rights reserved.
Structure-activity relationships in a series of xanthine derivatives with antibronchoconstrictory and bronchodilatory activities