METHOD FOR PURIFYING 5' -PROTECTED THYMIDINES AND NOVEL DERIVATIVES THEREOF

摘要

This invention provides a method for efficiently purifying 5'-protected thymidines which cannot be efficiently purified by the prior art. Impurities can be separated by obtaining crystals including a carbonyl-containing solvent to provide a highly pure 5'-protected thymidine. Thus, this invention allows 5'-protected thymidines, which cannot be purified in an industrial scale by the prior art, to be easily provided with a high purity in a large scale.