Syntheses of 3-Substituted 1-Methyl-6-phenylpyrimido(5,4-e)-1,2,4-triazine-5,7(1H,6H)-diones (6-Phenyl Analogs of Toxoflavin) and Their 4-Oxides, and Evaluation of Antimicrobial Activity of Toxoflavins and Their Analogs.
作者:Tomohisa NAGAMATSU、Hirofumi YAMASAKI、Takashi HIROTA、Masatoshi YAMATO、Yutaka KIDO、Motoo SHIBATA、Fumio YONEDA
DOI:10.1248/cpb.41.362
日期:——
6-Phenyl analogs of toxoflavin (1-methyl-6-phenylpyrimido[5,4-e]-1,2,4-triazine-5,7(1H,6H)-diones ) (7a--f) and their 4-oxides (8a-f) were synthesized by nitrosative or nitrative cyclization of the aldehyde hydrazones (6a-f) of 6-(1-methylhydrazino)-3-phenyluracil (5). Both sets of compounds, 7a-f and 8a-f, gave the corresponding 1-demethyl derivatives (10a-f) upon treatment with nucleophiles such
毒黄素的6-苯基类似物(1-甲基-6-苯基嘧啶[5,4-e] -1,2,4-三嗪-5,7(1H,6H)-二酮)(7a–f)及其4通过对6-(1-甲基肼基)-3-苯基尿嘧啶(5)的醛(6a-f)进行亚硝化或硝化环化反应合成α-氧化物(8a-f)。在加热下用亲核试剂如二甲基甲酰胺(DMF)和乙酸处理后,两组化合物7a-f和8a-f均得到相应的1-脱甲基衍生物(10a-f)。检查了毒素黄素(1a-e),毒素4-氧化物(3a-e)及其6-苯基类似物(7a-f和8a-f)对多种细菌和真菌菌株的活性。大多数化合物显示出对革兰氏阳性细菌的强抑制活性。在化合物中,1c,1d,1e和3c表现出对微球菌的最强抑制作用(0。5微克/毫升的最小生长抑制浓度)和金黄色葡萄球菌4R(1微克/毫升),以及枯草芽孢杆菌和金黄色葡萄球菌(1-2微克/毫升)。大多数化合物对白色念珠菌和酿酒酵母具有很强的抗真菌活性(最低2-100微克/毫升的生长抑制浓度)。