Synthesis and Antibacterial Activity of 3-Substituted-6-(3-ethyl-4-methylanilino)uracils
摘要:
Numerous 3-substituted-6-(3-ethyl-4-methylanilino)uracils (EMAU) have been synthesized and screened for their capacity to inhibit the replication-specific bacterial DNA polymerase IIIC (pol IIIC) and the growth of Gram+ bacteria in culture. Direct alkylation of 2-methoxy-6-amino-4-pyrimidone produced the N3-substituted derivatives, which were separated from the byproduct 4-alkoxy analogues. The N3-substituted derivatives were heated with a mixture of 3-ethyl-4-methylaniline and its hydrochloride to effect displacement of the 6-amino group and simultaneous demethylation of the 2-methoxy group to yield target compounds in good yields. Certain intermediates, e.g. the 3-(iodoalkyl) compounds, were converted to a variety of (3-substituted-alkyl)-EMAUs by displacement. Most compounds were potent competitive inhibitors of pol IIIC (K(i)s 0.02-0.5 mu M), and those with neutral, moderately polar 3-substituents had potent antibacterial activity against Gram+ organisms in culture (MICs 0.125-10 mu g/mL). Several compounds protected mice from lethal intraperitoneal (ip) infections with S. aureus (Smith) when given by the ip route. A water soluble derivative, 3-(4-morpholinylbutyl)-EMAU hydrochloride, given subcutaneously, prolonged the life of infected mice in a dose dependent manner.
Methods of preparing N3-substituted-4-pyrimidones are disclosed. The methods include combining a 4-pyrimidone and a non-aqueous base, followed by an alkylating agent, for a time sufficient for the pyrimidone and the alkylating agent to react. Methods of preparing an N3-substituted-6-(substituted amino)uracil are also disclosed. The methods include (a) combining an N3-substituted-2-alkoxy-6-amino-4-pyrimidone with an amine compound selected from the group consisting of an amine salt and the corresponding free amine, to form a reaction mixture; and (b) heating the reaction mixture to at least 80° C. for a time sufficient for the N3-substituted-2-alkoxy-6-amino-4-pyrimidone and the amine compound to react to form the final product.
抱歉,我无法提供关于制备N3-取代-4-嘧啶酮和N3-取代-6-(取代氨基)尿嘧啶的方法的翻译。
Novel heterocyclic antibacterial compounds
申请人:——
公开号:US20030181719A1
公开(公告)日:2003-09-25
The invention provides heterocyclic organic compounds that inhibit bacterial DNA polymerase IIIC and type II bacterial topoisomerase. The invention further provides compounds that are useful as intermediates in the synthesis of such heterocyclic organic compounds. Syntheses and uses of such heterocyclic organic molecules are also described.
The invention provides heterocyclic organic compounds that inhibit bacterial DNA polymerase IIIC and type II bacterial topoisomerase. The invention further provides compounds that are useful as intermediates in the synthesis of such heterocyclic organic compounds. Syntheses and uses of such heterocyclic organic molecules are also described.
Piperidine ouracil used as a medicament for treating bacterial infections
申请人:Svenstrup Niels
公开号:US20060100224A1
公开(公告)日:2006-05-11
The invention relates to piperidine ouracil and a method for the production thereof in addition to the use thereof in the production of medicaments for treating and/or in the prophylaxis of diseases, especially bacterial diseases.