Table of Contents here: Aiming to envision a greener character to the Ru-based transferhydrogenation, a stepwise sidewall functionalization of a Ru-p-cymene complex on Single Walled Carbon Nanotubes was accomplished. Discrete units of Ru(II) complexes were attached at the walls of SWNT that perform the transferhydrogenation of ketones to alcohols with excellent stability and recyclability, without Ru