Development of site- and stereoselective continuous flow deuterium labelling method for carbohydrates using high dispersion effect towards Ru/C of hydrogen flow

A site- and stereoselective deuterium labelling method for carbohydrates has been developed using a Ru/C catalyst under continuous flow conditions. It has been demonstrated that enhancing the void fraction of the catalyst cartridge leads to improved incorporation, while maintaining high selectivity over 150 h. This scalable, sustainable approach has the potential to reduce energy use, waste and Ru consumption, thus broadening continuous flow applications in organic synthesis.