由于铁与毒力之间的联系以及在感染过程中依赖于血红素作为铁源的依赖性,因此需要新的治疗靶标来对抗多重耐药性感染,例如铜绿假单胞菌的铁调节血红素加氧酶(HemO)。本文中,我们报道了一系列基于亚氨基胍的HemO抑制剂的合成和活性。化合物23对铜绿假单胞菌PAO1的结合亲和力为5.7μM,MIC 50为52.3μg/ mL 。通过将HemO活性与biliverdin-IXα依赖的红外荧光蛋白偶联来进行细胞内活性测定,其中化合物23显示EC 50为11.3μM。该化合物对铜绿假单胞菌的临床分离物显示出增强的活性,进一步证实了靶途径。这类抑制剂通过结合变构位点起作用。这种新型的结合位点是在计算机上提出的,并由饱和转移差异(STD)NMR和氢交换质谱(HXMS)支持。
Theoretical and experimental13C and15N NMR investigation of guanylhydrazones in solution
作者:Tales L. C. Martins、Teodorico C. Ramalho、Jos� D. Figueroa-Villar、Alex F.C. Flores、Cl�udio M. P. Pereira
DOI:10.1002/mrc.1299
日期:2003.12
theoretical 15N and 13C NMR data for the three nitrobenzaldehyde guanylhydrazones are reported. The theoretical data were obtained using sequential molecular dynamics/quantum mechanics methodology for the calculation of flexible molecules in a condensed phase, followed by the use of the GIAO/DFT method with the 6–311G** basis set. The experimental 15N chemical shifts for the guanylhydrazones are compared with
Synthesis of Guanylhydrazones Under Microwave Irradiation
作者:Tales L. C. Martins、Tanos C. C. França、Teodorico C. Ramalho、José D. Figueroa‐Villar
DOI:10.1081/scc-200034774
日期:2004.12.31
The reaction of aromatic aldehydes and ketones with aminoguanidine hydrochloride under microwave irradiation (MWI) afforded guanylhydrazones in shorter reaction times and improved yield as compared to the conventional methodology.