Pyrido[2,3-d]pyrimidine antibacterial agents. IV. Synthesis of metabolites of piromidic acid.
作者:JUNICHI MATSUMOTO、AKIRA MINAMIDA、YOSHITAKA KIMURA、SHINSAKU MINAMI
DOI:10.1248/cpb.28.2531
日期:——
Three metabolites of the antibacterial agent, piromidic acid (8-ethyl-5, 8-dihydro-5-oxo-2-(1-pyrrolidinyl) pyrido [2, 3-d] pyrimidine-6-carboxylic acid), were synthesized in order to confirm their structures, i.e., 2-(3-hydroxy-1-pyrrolidinyl)-(4), 2-(2-hydroxy-1-pyrrolidinyl)-(8), and 2-(3-carboxypropylamino)-8-ethyl-5, 8-dihydro-5-oxopyrido [2, 3-d]-pyrimidine-6-carboxylic acids (13). Compounds 4, 8, and 13 were identified with the metabolites designated as A, B, and I, respectively, on the basis of their IR, UV, MS, and NMR spectra. 8-Ethyl-5, 8-dihydro-2-(3- and 4-hydroxypiperidino)-5-oxopyrido [2, 3-d] pyrimidine-6-carboxylic acids (6a and 6b) as well as the O-formyl (5a), -acetyl (5b), -benzoyl (5c), and -methanesulfonyl (5d) derivatives of 4 were prepared and tested for antibacterial activity. Of the compounds discussed in this paper, 4 was the most active, particularly against gram-negative bacteria.
为了确认抗菌剂吡罗米地酸(8-乙基-5, 8-二氢-5-氧代-2-(1-吡咯烷基)吡啶并[2, 3-d]嘧啶-6-羧酸)的结构,合成了其三种代谢物,即2-(3-羟基-1-吡咯烷基)-(4)、2-(2-羟基-1-吡咯烷基)-(8)和 2-(3-羧丙基氨基)-8-乙基-5,8-二氢-5-氧代吡啶并[2,3-d]嘧啶-6-羧酸 (13)。根据化合物 4、8 和 13 的红外光谱、紫外光谱、质谱和核磁共振光谱,确定其代谢物分别为 A、B 和 I。制备了 8-乙基-5,8-二氢-2-(3-和 4-羟基哌啶基)-5-氧代吡啶并[2,3-d]嘧啶-6-羧酸(6a 和 6b)以及 4 的 O-甲酰基(5a)、-乙酰基(5b)、-苯甲酰基(5c)和-甲磺酰基(5d)衍生物,并进行了抗菌活性测试。在本文讨论的化合物中,4 的活性最高,尤其是对革兰氏阴性细菌。