Quinolonecarboxylic acids. 2. Synthesis and antibacterial evaluation of 7-oxo-2,3 dihydro-7H-pyrido[1,2,3-de][1,4]benzothiazine-6-carboxylic acids
作者:Violetta Cecchetti、Arnaldo Fravolini、Renata Fringuelli、Giuseppe Mascellani、Piergiuseppe Pagella、Maurizio Palmioli、Giorgio Segre、Patrizia Terni
DOI:10.1021/jm00386a005
日期:1987.3
pyridobenzothiazine acid derivatives was synthesized and their in vitro antibacterial activity was evaluated. The 1,4-benzothiazine intermediates, which by Gould-Jacobs quinoline synthesis produced pyridobenzothiazine acids, were prepared by hydrolytic basic cleavage of substituted 2-aminobenzothiazoles and successive cyclocondensation with 1-bromo-2-chloroethane or alternatively with monochloroacetic acid, hence
合成了一系列的吡啶并苯并噻嗪酸衍生物,并对其体外抗菌活性进行了评估。1,4-苯并噻嗪中间体是通过Gould-Jacobs喹啉合成而生成吡啶基苯并噻嗪酸的,其制备方法是将取代的2-氨基苯并噻唑进行水解碱性裂解,然后用1-溴-2-氯乙烷或一氯乙酸进行连续环缩合反应,然后通过LiAlH4。吡啶并苯并噻嗪酸10c,30和31对革兰氏阳性和革兰氏阴性病原体显示出强大的抗菌活性。讨论了构效关系。化合物9-氟-10-(4-甲基-1-哌嗪基)-7-氧代-2,3-二氢-7H-吡啶基[1,2,3-de] [1,4]苯并噻嗪-6-羧酸已发现酸(31)(MF-934)具有抗菌活性,