Synthesis and Antitumor Activities of Novel 6-5 Fused Ring Heterocycle Antifolates: N-[4-[.omega.-(2-Amino-4-substituted-6,7-dihydrocyclopenta[d]pyrimidin-5-yl)alkyl]benzoyl]-L-glutamic Acids
作者:Yoshihiko Kotake、Atsumi Iijima、Kentaro Yoshimatsu、Naoko Tamai、Yoichi Ozawa、Nozomu Koyanagi、Kyosuke Kitoh、Hiroaki Nomura
DOI:10.1021/jm00037a012
日期:1994.5
molecule. The synthetic method involves (1) synthesis of key intermediates of tert-butyl 4-[omega-(2-substituted-3-oxocyclopentanyl) alkyl]benzoates (8a,b and 9a,b) by a carbon-carbon radical coupling of tert-butyl 4-(omega-iodoalkyl)benzoates (7a,b) with 2-substituted-2-cyclopenten-1-ones (5 and 6) utilizing tributyltin hydride, (2) cyclization of either the methyl enol-ethers derived from the 2-cyanocyclopentanones
在叶酸分子的杂环和桥键区结合修饰的基础上,合成了具有6-5个稠环系统的新型抗叶酸剂6,7-二氢环戊基[d]嘧啶(3a,b和4a,b)。合成方法涉及(1)通过叔碳-碳自由基偶联来合成4- [ω-(2-取代的3-氧代环戊基)烷基]苯甲酸叔丁酯的关键中间体(8a,b和9a,b)利用氢化三丁基锡用2-取代的2-环戊烯-1-酮(5和6)合成4-(ω-碘烷基)苯甲酸丁酯(7a,b),(2)衍生自通过用胍处理2-氰基环戊酮(8a,b)或2-(甲氧基羰基)环戊酮(9a,b)本身可生成带有4-(叔丁氧基羰基)苯基烷基的6,7-二氢环戊基[d]嘧啶( 11a,b和14a,b),(3)脱保护为相应的羧酸(12a,b和15a,b),和(4)用谷氨酸二乙酯酰胺化和脱酯。用含有三亚甲基(3a)或亚乙基桥(3b)的2,4-二氨基嘧啶稠合的环戊烯化合物发现了有效的二氢叶酸还原酶抑制作用和高度有效的细胞生长抑制作用,但没有