Synthesis and Biological Activity of 7-Oxo Substituted Analogues of 5-Deaza-5,6,7,8-tetrahydrofolic Acid (5-DATHF) and 5,10-Dideaza-5,6,7,8-tetrahydrofolic Acid (DDATHF)
作者:José I. Borrell、Jordi Teixidó、Josep Lluís Matallana、Blanca Martínez-Teipel、Carles Colominas、Marta Costa、Merche Balcells、Elisabeth Schuler、María José Castillo
DOI:10.1021/jm990411u
日期:2001.7.1
We recently described the syntheses of 12a-c, 4-amino-7-oxo substituted analogues of 5-deaza-5,6,7,8-tetrahydrofolic acid (5-DATHF), and 5,10-dideaza-5,6,7,8-tetrahydrofolic acid (DDATHF), in six steps from commercially available p-substituted methyl benzoates in: 20-27% overall yields; Such analogues were tested in vitro against CCRF-CEM leukemia cells and showed that they are completely devoid of any activity, the IC50 being higher than 20 mug/mL for all cases. To clarify if the presence of the carbonyl group in position C7, the distinctive feature of our synthetic. methodology, is the reason for this lack of activity, we have now obtained the 7-oxo substituted analogues of 5-DATHF and DDATHF, 18a-c, in 10-30% overall yield. Testing of 18a-c in vitro against CCRF-CEM leukemia cells revealed that these compounds are totally inactive. A molecular modeling study of 18b inside the active site of the complex El coli GARTFase-5-DATHF-GAR pointed to an electronic repulsion between the atoms of the 7-ore group and the carbonyl group of Arg90 as a possible explanation for the inactivity of 18a-c.