Synthesis and Biological Activity of N.omega.-Hemiphthaloyl-.alpha.,.omega.-diaminoalkanoic Acid Analogs of Aminopterin and 3',5-Dichloroaminopterin
作者:Andre Rosowsky、Henry Bader、Joel E. Wright、Khandan Keyomarsi、Larry H. Matherly
DOI:10.1021/jm00040a008
日期:1994.7
carcinoma in culture. PT523 was several times more potent than methotrexate (MTX), aminopterin (AMT), or trimetrexate (TMQ). 3',5'-Dichloro substitution did not decrease either DHFR binding or cytotoxicity. A new synthetic route to PT523 from 2,4-diamino-6-(hydroxymethyl)pteridine and methyl N alpha-(4-aminobenzoyl)-N delta-phthaloyl-L-ornithinate was investigated but was not found superior to previously
Nα-(4-氨基-4-脱氧蝶酰基)-Nδ-(半邻苯二甲酰基)-L-鸟氨酸(PT523)的类似物,在对氨基苯甲酰基部分具有3',5'-二氯取代,或具有一个或多个或多个合成了氨基酸部分中的CH2基团,并将其作为二氢叶酸还原酶(DHFR)活性和细胞生长的抑制剂进行了测试。用L-2,4-二氨基丁酸或L-赖氨酸替代PT523中的L-鸟氨酸不会降低与人重组DHFR的结合力,但会导致针对SCC25人和SCC VII鼠鳞状细胞癌以及针对MCF-7的活性丧失人类乳腺癌的文化。PT523的效力比甲氨蝶呤(MTX),氨基蝶呤(AMT)或曲美脲(TMQ)强几倍。3',5'-二氯取代不会降低DHFR结合或细胞毒性。从2到PT523的新合成路线 研究了4-二氨基-6-(羟甲基)蝶啶和甲基Nα-(4-氨基苯甲酰基)-N-邻苯二甲酰基-L-鸟氨酸盐,但没有发现其优于前述方法。在有关PT523和MTX竞争性抑制(6R)-5