已合成了30种羟基氨基脲的席夫碱(Ar-CH = NNHCONHOH),并针对L1210鼠白血病细胞进行了测试。发现IC(50)值在2.7 x 10(-6)至9.4 x 10(-4)M的范围内。30种化合物中的17种具有比羟基脲(一种抗癌药)更高的抑制活性。目前用于治疗针对L1210细胞的黑色素瘤,白血病和卵巢癌。IC(50)值在微摩尔范围内的六种化合物的效力比羟基脲高11至30倍(IC(50)= 8.2 x 10(-5)M)。通过摇瓶法测定模型化合物[1-(3-三氟甲基亚苄基)-4-羟基氨基脲的模型的分配系数(log P)和电离常数(pK(a)),测得的log P为用于推导-CH = NNHCONHOH的Hansch-Fujita pi常数。根据新获得的pi和其他部分的pi,通过pi值的总和计算出其他29种化合物的分配系数(SlogP)。定量构效关系(QSAR)分析表明,除基本药效团(-
已合成了30种羟基氨基脲的席夫碱(Ar-CH = NNHCONHOH),并针对L1210鼠白血病细胞进行了测试。发现IC(50)值在2.7 x 10(-6)至9.4 x 10(-4)M的范围内。30种化合物中的17种具有比羟基脲(一种抗癌药)更高的抑制活性。目前用于治疗针对L1210细胞的黑色素瘤,白血病和卵巢癌。IC(50)值在微摩尔范围内的六种化合物的效力比羟基脲高11至30倍(IC(50)= 8.2 x 10(-5)M)。通过摇瓶法测定模型化合物[1-(3-三氟甲基亚苄基)-4-羟基氨基脲的模型的分配系数(log P)和电离常数(pK(a)),测得的log P为用于推导-CH = NNHCONHOH的Hansch-Fujita pi常数。根据新获得的pi和其他部分的pi,通过pi值的总和计算出其他29种化合物的分配系数(SlogP)。定量构效关系(QSAR)分析表明,除基本药效团(-
Herbicidal sulphonylaminocarbonyltriazolinones having two substituents
申请人:Bayer Aktiengesellschaft
公开号:US05300480A1
公开(公告)日:1994-04-05
Herbicidal sulphonylaminocarbonyltriazolinones having two substituents bonded via oxygen, of the formula ##STR1## in which R.sup.1 represents hydrogen or an optionally substituted radical from the series comprising alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkenyl and aralkyl, R.sup.2 represents an optionally substituted radical from the series comprising alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkenyl and aralkyl, and R.sup.3 represents an optionally substituted radical from the series comprising alkyl, aralkyl, aryl and heteroaryl, and their salts.
Grobner; Muller, European Journal of Medicinal Chemistry, 1974, vol. 9, # 3, p. 341 - 343
作者:Grobner、Muller
DOI:——
日期:——
Chemical scaffolds with structural similarities to siderophores of nonribosomal peptide–polyketide origin as novel antimicrobials against Mycobacterium tuberculosis and Yersinia pestis
作者:Julian A. Ferreras、Akash Gupta、Neal D. Amin、Arijit Basu、Barij N. Sinha、Stefan Worgall、Venkatesan Jayaprakash、Luis E.N. Quadri
DOI:10.1016/j.bmcl.2011.08.052
日期:2011.11
Mycobacterium tuberculosis (Mtb) and Yersinia pestis (Yp) produce siderophores with scaffolds of nonribosomal peptide-polyketide origin. Compounds with structural similarities to these siderophores were synthesized and evaluated as antimicrobials against Mtb and Yp under iron-limiting conditions mimicking the iron scarcity these pathogens encounter in the host and under standard iron-rich conditions. Several new antimicrobials were identified, including some with increased potency in the iron-limiting condition. Our study illustrates the possibility of screening compound libraries in both iron-rich and iron-limiting conditions to identify antimicrobials that may selectively target iron scarcity-adapted bacteria and highlights the usefulness of building combinatorial libraries of compounds having scaffolds with structural similarities to siderophores to feed into antimicrobial screening programs. Published by Elsevier Ltd.