| 摘要 |
A method of converting pure alpha-anomer or beta/alpha-anomer mixtures of 1,2,3,5-tetra-O-acetyl-L-ribofuranose to methyl-1-(2,3,5 -tri-O-acetyl-beta-L-ribofuranosyl)-1,2,4-triazole-3-carboxylate an intermediate for levovirin, as well as, the novel pure alpha-anomer, alpha 1,2,3,5-tetra-O-acetyl-L-ribofuiranose, are useful in manufacturing levovirin.
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