Structural Studies on Bioactive Compounds. 39. Biological Consequences of the Structural Modification of DHFR-Inhibitory 2,4-Diamino-6-(4-substituted benzylamino-3-nitrophenyl)-6-ethylpyrimidines (‘benzoprims')
摘要:
Benzimidazole-N-oxide modifications of potent lipophilic dihydrofolate reductase (DHFR) inhibitors (e.g., methylbenzoprim 1 and dichlorobenzoprim 2) have been prepared by basepromoted cyclization of the nitrophenylbenzylamino groups to explore the possibility that abrogation of DHFR-inhibitory activity might reveal clues to an alternative anti-ras mechanism. Examples of the new series had only low growth inhibitory activities (Gi(50) generally > 50 muM) against colon HCT116 and lung HT29 cell lines but, unlike methylbenzoprim, this activity was unaffected by hypoxanthine/thymidine rescue.
Structural studies on bioactive compounds. 8. Synthesis, crystal structure and biological properties of a new series of 2,4-diamino-5-aryl-6-ethylpyrimidine dihydrofolate reductase inhibitors with in vivo activity against a methotrexate-resistant tumor cell line
作者:Roger J. Griffin、Michelle A. Meek、Carl H. Schwalbe、Malcolm F. G. Stevens
DOI:10.1021/jm00131a009
日期:1989.11
A series of 2,4-diamino-5-aryl-6-ethylpyrimidines embracing basic substituents in the 5-aryl ring was synthesized and evaluated for inhibitory activity against rat liver dihydrofolate reductase (DHFR). Maximal enzyme inhibition was observed for compounds bearing a benzylamino (19) or N-alkylbenzylamino substituent (29 and 30) in the 4-position of the phenyl ring and a nitro group in the 3-position
Structural Studies on Bioactive Compounds. 39. Biological Consequences of the Structural Modification of DHFR-Inhibitory 2,4-Diamino-6-(4-substituted benzylamino-3-nitrophenyl)-6-ethylpyrimidines (‘benzoprims')
作者:Marianne L. Richardson、Karen A. Croughton、Charles S. Matthews、Malcolm F. G. Stevens
DOI:10.1021/jm040785+
日期:2004.7.1
Benzimidazole-N-oxide modifications of potent lipophilic dihydrofolate reductase (DHFR) inhibitors (e.g., methylbenzoprim 1 and dichlorobenzoprim 2) have been prepared by basepromoted cyclization of the nitrophenylbenzylamino groups to explore the possibility that abrogation of DHFR-inhibitory activity might reveal clues to an alternative anti-ras mechanism. Examples of the new series had only low growth inhibitory activities (Gi(50) generally > 50 muM) against colon HCT116 and lung HT29 cell lines but, unlike methylbenzoprim, this activity was unaffected by hypoxanthine/thymidine rescue.