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Lookup NU author(s): Professor Alan Calvert
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Five new analogues (1c-g) of the antifolate N10-propargyl-5,8-dideazafolic acid (1a) are described in which the benzoyl-L-glutamate moiety was replaced by benzoic acid (desglutamyl-N10-propargyl-5,8-dideazafolic acid), benzoyl-L-aspartate, 4-phenylbutyrate, benzoylglycine, and benzoyl-L-alanine. The esters of the appropriate 4-aminophenyl (benzoyl) starting materials were sequentially alkylated upon nitrogen, first with a propargyl halide and then with 2-amino-6-(bromomethyl)-4-hydroxyquinazoline hydrobromide. Saponification of the antifolate esters so produced gave the desired analogues. The new derivatives (1c-g) and also the known diethyl ester of 1a (1b) were tested for their inhibition of purified L1210 thymidylate synthase (TS) and for their inhibition of the growth of L1210 cells in culture. The TS inhibition of the analogues 1b-g was estimated by calculating the inverse relative potency, defined as the ratio IC50(compound)/IC50(1a). The results obtained were as follows: greater than 62, 84, 9, 333, 21, and 5, respectively. All were thus less inhibitory than 1a. None of the compounds improved upon 1a in inhibiting the growth of L1210 cells in culture.
Author(s): Jones TR, Smithers MJ, Betteridge RF, Taylor MA, Jackman AL, Calvert AH, Davies LC, Harrap KR
Publication type: Article
Publication status: Published
Journal: Journal of Medicinal Chemistry
Year: 1986
Volume: 29
Issue: 6
Pages: 1114-1118
Print publication date: 01/06/1986
ISSN (print): 0022-2623
ISSN (electronic): 1520-4804
URL: http://dx.doi.org/10.1021/jm00156a033
DOI: 10.1021/jm00156a033
PubMed id: 3712376
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