Synthesis and antiherpesviral activity of 5-C-substituted uracil nucleosides.

Reaction of 2'-deoxy-5-hydroxyuridine with some Wittig reagents gave 5-alkoxycarbonylmethyl-, 5-carbamoylmethyl-, 5-cyanomethyl-and 5-acetonyl-2'-deoxyuridines. The corresponding 1-beta-D-arabinofuranosyl derivatives were prepared from 1-beta-D-arabinofuranosyl-5-hydroxymethyluracil. The latter was also converted to 1-beta-D-arabinofuranosyl-5-vinyluracil via triphenylphosphonium salt, and then to 5-(2-halogenovinyl)derivatives. Some of these compounds showed marked antiherpesviral activity in vitro.