INTERMEDIATE FOR SYNTHESIS OF 1-(2-DEOXY-2-FLUORO-4-THIO--D- ARABINOFURANOSYL) CYTOSINE, INTERMEDIATE FOR SYNTHESIS OF THIONUCLEOSIDE, AND METHODS FOR PRODUCING THESE INTERMEDIATES 1-(2--2--4---D-)

摘要

A compound represented by a formula [ID] as shown below (wherein R 1A , R 1B , R 2A , R 2B , R 3A and R 3B represent a hydrogen atom, an optionally substituted C 1-6 alkyl group, and the like) is useful as an intermediate for producing a thionucleoside, and the production method of the present invention is useful as a method for producing a thionucleoside.