Synthesis and Biological Activities of Conformationally Restricted, Tricyclic Nonclassical Antifolates as Inhibitors of Dihydrofolate Reductases
作者:Aleem Gangjee、Jufang Shi、Sherry F. Queener
DOI:10.1021/jm960693n
日期:1997.6.1
semirigid orientations were achieved by bridging the C5 and N10 of compound 12 with a N-ethyl bridge and by variation of the position of double bonds in rings B and C as well as substitution at the 2',6'-positions of the phenyl ring. The synthesis of compounds 5-11 were accomplished by cyclocondensation of the appropriate keto ester (as the biselectrophile) with 2,4,6-triaminopyrimidine to afford the