Adenosine-2-thione

Adenosine-2-thione is a purine-nucleoside derivative featuring a 2'-thione substitution on the ribosyl moiety of adenosine. The thiocarbonyl functionality replaces the native 2'-hydroxyl group, introducing a sulfur atom conjugated to the sugar ring’s anomeric center. This structural modification disrupts the hydrogen-bonding capacity of the ribose, while retaining the adenine base’s N-glycosidic linkage. The compound arises as a process-related impurity during adenosine synthesis, particularly under oxidative or sulfur-mediated reaction conditions. Its distinct thiocarbonyl chromophore enables UV spectral differentiation from parent adenosine, facilitating HPLC reference standard use for impurity profiling in pharmaceutical development.