Synthesis and biological evaluation of phosphonated dihydroisoxazole nucleosides
摘要:
Phosphonated isoxazolinyl nucleosides have been prepared via 1,3-dipolar cycloaddition reaction of nitrile oxides with corresponding vinyl or allyl nucleobases for antiviral studies. The cytotoxicity, the anti-HSV activity and the RT-inhibitory activity of the obtained compounds were evaluated and compared with those of AZT and diethyl{(I'SR,4'RS)-I'-[[(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)]-3'-methyl-2'-oxa-3'-azacyclopent-4'-yl]}methylphosphonate, a saturated phosphonated dihydroisoxazole nucleoside analogue. (c) 2006 Elsevier Ltd. All rights reserved.
Lewis acid catalyst, transforming the well known, but drastic, exchange of the acetyl group of vinyl acetate with pyrimidine and purine derivatives in a very gentle and quick method to obtain a whole set of vinyl nucleobases.