N-Ribosidation of a series of azolinones was achieved via silylation and SnCll catalysis. N- Ribosidation of 4-imidazolin-2-one gave l-8-~-ribofuranosyl-4-imidazolin-2-one; of 1, 2, 4- triazolin-3-one gave 2-and 4-8-D-ribo-furanosyl-1, 2, 4-triazolin-3-one, and 2, 4-di-~-D- ribofuranosyl-1, 2, 4-triazolin-3-one; and of 2-tetrazolin-5-one gave l-@-~-ribofuranosyl-2- tetrazolin-5-one and 1, 4-di-@-D-ribofuranosyl-2-tetrazolin-5-one. Structure assignments ...
