The present invention is anti-folate antimalarials with dual-binding modes of the general formula (I) [refer to structure in the abstract] wherein R1 and R2 which may be the same or different are independently selected from methyl or ethyl or alkylphenyl, R3 is independently hydrogen, halide, lower alkyl substituted with ester, carboxylic, amide, and ether. Linker is X(CH2)nY wherein X and Y which may be the same or different are independently selected from oxygen, carbon, nitrogen, substituted phenyl where n is an integer from 1 to 2-6, or pharmaceutically acceptable salts therefore. The anti-folate antimalarials with dual-binding modes act as novel inhibitors with good inhibition constants against wild-type, double (C59R+SIOSN), triple (N51+C59R+SIOSN, C59R+S 1 OSN+I164L), and quadruple (N51+C59R+S108N+I164L) mutant enzymes. The compounds are also effective against wild type (Tm4/S.2) and mutants (K1CB1, W2, Cs1-2 and V1/S) malaria parasites.
本发明涉及一种具有双重结合模式的抗叶酸抗疟疾药物,其一般式为(I)[参见摘要中的结构],其中R1和R2可以相同也可以不同,独立地选自甲基或乙基或烷基苯基,R3独立地选自氢、卤素、取代酯、羧基、酰胺和醚的低烷基。连接体为X(
CH2)nY,其中X和Y可以相同也可以不同,独立地选自氧、碳、氮、取代苯基,n为1至2-6的整数,或其药学上可接受的盐。具有双重结合模式的抗叶酸抗疟疾药物作为新型
抑制剂,对野生型、双重(C59R+SIOSN)、三重(N51+C59R+SIOSN,C59R+S1OSN+I164L)和四重(N51+C59R+S108N+I164L)突变酶具有良好的抑制常数。这些化合物还对野生型(Tm4/S.2)和突变体(K1CB1、W2、Cs1-2和V1/S)疟原虫有效。