A compound represented by a formula [1D] 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.
下列
化学式[1D]所代表的化合物(其中R1A、R1B、R2A、R2B、R3A和R3B分别代表氢原子、可选择取代的C1-6烷基等)可用作生产
硫代核苷的中间体,而本发明的生产方法则可用作生产
硫代核苷的方法。