Non-glutamate Type Pyrrolo(2,3-d)pyrimidine Antifolates. II. Synthesis and Antitumor Activity of N5-Substituted Glutamine Analogs.
作者:Fumio ITOH、Yoshio YOSHIOKA、Koichi YUKISHIGE、Sei YOSHIDA、Megumi WAJIMA、Koichiro OOTSU、Hiroshi AKIMOTO
DOI:10.1248/cpb.44.1498
日期:——
cross resistance to the analog (4Oa) having a tetrazole moiety as a substituent of glutamine, which exhibited potent antitumor activities. These results demonstrate that the antifolate analogs (4) with N5-substituted glutamine in place of glutamic acid are novel potent DHFR inhibitors with activity against MTX-resistant tumors. The potent antitumor activity of these analogs (4) may result from their
N- [4- [3-(2,4-二氨基-7H-吡咯并[2,3-d]嘧啶-5-基)丙基]苯甲酰基] -L-谷氨酸的谷氨酸部分(1b,TNP- 351)和相关化合物被一些N5取代的谷氨酰胺代替。通过将吡咯并[2,3-d]嘧啶羧酸(11a,b)与一些经过适当保护的N5取代的谷氨酰胺衍生物(10A-S)偶联来有效制备抗叶酸剂(4A-S),这是通过偶联Boc-Glu制备的使用合适的缩合试剂将-OMe(7)与各种胺(8A-S)结合,然后进行水解。检查了所得产物对培养物中二氢叶酸还原酶(DHFR),胸苷酸合成酶(TS)和鼠类纤维肉瘤Meth A细胞生长的抑制作用。所有N5取代的谷氨酰胺类似物(4A-S)对DHFR的抑制作用都比TNP-351强得多,并且某些类似物对Meth A细胞的生长抑制作用与TNP-351相同。还检查了一些典型的类似物(4Bb,4Db,4F,4Oa)对培养物中抗甲氨蝶呤(MTX)的人C