Synthesis and Antitumor Activities of Novel Pyrimidine Derivatives of 2,3-<i>O</i>,<i>O</i>-Dibenzyl-6-deoxy-<scp>l</scp>-ascorbic Acid and 4,5-Didehydro-5,6- dideoxy-<scp>l</scp>-ascorbic Acid
作者:Silvana Raić-Malić、Draženka Svedružić、Tatjana Gazivoda、Andreja Marunović、Antonija Hergold-Brundić、Ante Nagl、Jan Balzarini、Erik De Clercq、Mladen Mintas
DOI:10.1021/jm0009540
日期:2000.12.1
The new pyrimidine derivatives of 2,3-O,O-dibenzyl-6-deoxy-L-ascorbic acid (8-10) were synthesized by condensation of uracil and its 5-fluoro- and 5-trifluoromethyl-substituted derivatives with 4-(5,6-epoxypropyl)-2,3-O,O-dibenzyl-L-ascorbic acid (7), while pyrimidine derivatives of 4,5-didehydro-5,6-dideoxy-L-ascorbic acid (14-17) with free C-2' and C-3' hydroxy groups in the lactone ring were obtained by debenzylation of 11-13 with boron trichloride. Z-Configuration of the C4'=C5' double bond and position of the benzyl group in the lactone ring of 14 were deduced from their H-1 and C-13 NMR spectra and connectivities in COSY, ROESY, and HMBC spectra. The exact stereostructure of 13 was confirmed by its X-ray crystal structure analysis. Of all the compounds in the series, compound 16 containing a 5-fluoro-substituted uracil ring showed the most significant antitumor activities against murine leukemia L1210/0 (IC50 = 1.4 mug/mL), murine mammary carcinoma FM3A/0 (IC50 = 0.78 mug/mL), and, to a lesser extent, human T-lymphocyte cells Molt4/C8 (IC50 = 31.8 mug/mL) and CEM/0 cell lines (IC50 = 20.9 mug/mL).