PROBLEM TO BE SOLVED: To provide a method for producing a glycosylated product capable of producing a β-glycosylated product with high selectivity in a glycosylation step including a reaction between thioarabinose and thymine having a protecting group； a method for producing 2'-fluoro-5-methyl-4'-thioarabinouridine comprising the method for producing the glycosylated product； and a method for separating and purifying β-glycosylated substance from a mixture of α-glycosylated substance and β-glycosylated substance by recrystallization.SOLUTION: According to the present invention, there is provided a method for producing a compound, the method comprising: reacting thioarabinose with thymine having a protecting group in a solvent containing chloroform to obtain a compound represented by the following formula (3): In the formula, Rand Reach independently represent a hydroxyl protecting group.SELECTED DRAWING: None【課題】チオアラビノースと保護基を有するチミンとの反応を含むグリコシル化工程においてβグリコシル化体を高い選択性で製造できるグリコシル化体の製造方法、上記のグリコシル化体の製造方法を含む２’－フルオロ－５－メチル－４’－チオアラビノウリジンの製造方法、並びにαグリコシル化体とβグリコシル化体との混合物からβグリコシル化体を再結晶により分離精製する方法を提供すること。【解決手段】クロロホルムを含む溶媒中において、チオアラビノースと保護基を有するチミンとの反応を行うことを含む、下記式（３）：式中、Ｒ1及びＲ2はそれぞれ独立に水酸基の保護基を示す：で示される化合物の製造方法。【選択図】なし
