Synthesis of Classical, Three-Carbon-Bridged 5-Substituted Furo[2,3-<i>d</i>]pyrimidine and 6-Substituted Pyrrolo[2,3-<i>d</i>]pyrimidine Analogues as Antifolates
作者:Aleem Gangjee、Yibin Zeng、John J. McGuire、Farideh Mehraein、Roy L. Kisliuk
DOI:10.1021/jm040123k
日期:2004.12.1
afford the substituted furo[2,3-d]pyrimidine 9 and the pyrrolo[2,3-d]pyrimidine 10. Subsequent coupling of each regioisomer with diethyl-l-glutamate followed by saponification afforded 4 and 5. The biological results indicate that elongation of the C8-C9 bridge of the classical 5-substituted 2,4-diaminofuro[2,3-d]pyrimidine and 6-substituted 2-amino-4-oxopyrrolo[2,3-d]pyrimidine are highly conducive
先前报道的经典两碳桥连抗叶酸,5-取代的2,4-二氨基呋喃[2,3-d]嘧啶(1)[其是LY231514(Alimta)的6-区域异构体]和6的桥同源物取代的2-氨基-4-氧代吡咯并[2,3-d]嘧啶,提供了三碳桥联的抗叶酸类似物4和5,对培养物中肿瘤细胞的抑制活性增强(EC(50)值在10( -8)-10(-7)M范围或更小)。这两个类似物是通过10步合成顺序合成的,从4-溴苯甲酸甲酯(14)开始,先被精制为α-氯甲基酮(8),然后与2,6-二氨基-嘧啶-4-酮( 7)得到取代的呋喃并[2,3-d]嘧啶9和吡咯并[2,3-d]嘧啶10。随后将每个区域异构体与谷氨酸二乙酯偶合,然后进行皂化,得到4和5。生物学结果表明,经典的5-取代的2,4-二氨基呋喃[2,3-d]嘧啶的C8-C9桥的伸长。尽管没有增加对靶酶的抑制活性,但是6-氨基-2-氨基-2-氧-2-吡咯并[2,3-d]嘧啶和6-取代