Modifications and structure–activity relationships at the 2-position of 4-sulfonamidopyrimidine derivatives as potent endothelin antagonists
作者:Hiroshi Morimoto、Hideshi Shimadzu、Toshihiro Hosaka、Yasushi Kawase、Kosuke Yasuda、Kohei Kikkawa、Rikako Yamauchi-Kohno、Koichiro Yamada
DOI:10.1016/s0960-894x(01)00682-5
日期:2002.1
To improve water solubility and to study structure-activity relationships, we modified the structure of the pyrimidine nucleus of each of a series of potent ET(A) antagonists, 3a and 4a, at the 2-position. In a previous study, each of these antagonists showed an extremely high affinity for the ET(A) receptor in porcine aortic membrane (IC(50) 3a; < 0.001 nM, 4a; 0.0039 nM). Two modification methods
为了提高水溶性并研究结构-活性关系,我们在2位修饰了一系列有效的ET(A)拮抗剂3a和4a的嘧啶核的结构。在以前的研究中,这些拮抗剂中的每一种都对猪主动脉膜中的ET(A)受体表现出极高的亲和力(IC(50)3a; <0.001 nM,4a; 0.0039 nM)。分别应用了两种修饰方法,一种是添加有机锂,然后进行DDQ氧化,另一种是2-(甲基磺酰基)嘧啶的亲核取代,以合成2-取代的4-磺酰胺基嘧啶衍生物。将芳基,杂芳基,烷基,氨基,烷氧基或烷硫基基团引入2-位可改变亲和力。