| Popis: |
10-Deaza modifications of classical antifolate analogues bearing the 1,4-disubstituted naphthalene ring in place of the 1,4-disubstituted benzene ring were prepared and tested for antitumor activity. Naphthalene analogues (9a−c, respectively) of 10-deazaaminopterin, 5-methyl-5,10-dideazaaminopterin, and 5-ethyl-5,10-dideazaaminopterin were prepared by a route consisting of C-alkylations of the anion derived from 4-carboxy-1-naphthaleneacetic acid dimethyl ester (2) by 6-(bromomethyl)-2,4-diaminopteridine (1a) and 6-(bromomethyl)-2,4-diamino-5-methyl- and -5-ethyl-5-deazapteridines (1b and 1c, respectively) followed by ester hydrolysis and subsequent decarboxylation to give naphthalene analogues (7a−c, respectively) of 4-amino-4-deoxy-10-deazapteroic acid and 4-amino-4-deoxy-5-methyl- and -5-ethyl-5,10-dideazapteroic acids. Peptide coupling of 7a−c with l-glutamic acid dialkyl ester followed by mild ester hydrolysis gave target compounds 9a−c. The key advantage of this route is circumvention of a hydrogena... |
Plný text