Lysine and ornithine analogs of methotrexate as inhibitors of dihydrofolate reductase

Journal of Medicinal Chemistry
1982.0

Abstract

The ornithine (6a) and lysine (6b) analogues of methotrexate (1) have been synthesized via condensation of 4-amino-4-deoxy-N10-methylpteroic acid (2) with N gamma-carbobenzoxy-L-ornithine tert-butyl ester (3a) and N epsilon-carbobenzoxy-L-lysine tert-butyl ester (3b), respectively. Removal of the protecting groups gave 5a and 6b. Compounds 6a and 6b and their precursor Cbz acids (5a and 5b) show significant inhibition of dihydrofolate reductase.

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