Synthesis and biological activity of the 2-desamino and 2-desamino-2-methyl analogs of aminopterin and methotrexate
作者:Andre Rosowsky、Ronald A. Forsch、Richard G. Moran、James H. Freisheim
DOI:10.1021/jm00105a036
日期:1991.1
cleaved the L enantiomer of MTX but left the D enantiomer unaffected. The 2-desamino and 2-desamino-2-methyl analogues of AMT and MTX inhibited the growth of tumor cells, but were very poor inhibitors of dihydrofolate reductase (DHFR). These unexpected results suggested that activity in intact cells was due to metabolism of the 2-desamino compounds to polyglutamates.
由2-氨基-5-(氯甲基)吡嗪-3-甲腈合成了先前未描述的氨基蝶呤(AMT)和甲氨蝶呤(MTX)的2-去氨基和2-去氨基-2-甲基类似物。AMT类似物通过三步顺序获得,包括与N-(4-氨基苯甲酰基)-L-谷氨酸二叔丁基缩合,与甲form或乙酸乙am加热,和与三氟乙酸温和酸解。相似地制备MTX类似物,除了将2-氨基-5-(氯甲基)吡嗪-3-甲腈与4-(N-甲基氨基)苯甲酸缩合,并将所得产物用甲am或乙酸乙am进行环化,得到2。 -4-氨基-4-脱氧-N10-甲基蝶酸的-脱氨基和2-脱氨基-2-甲基类似物。然后在磷腈氰二酸二乙酯存在下,用L-谷氨酸二叔丁酯缩合,然后用三氟乙酸酯裂解。在同样裂解MTX的L对映异构体但不影响D对映异构体的条件下,用羧肽酶G1快速且基本上完全水解证明了在该合成过程中谷氨酸部分中L构型的保留。AMT和MTX的2-desamino和2-desamino-2-methyl