Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The reduction of alkenes has been achieved using NaBH 4 as the reducing agent using 0.5–1.0 mol % Ru(PPh 3 ) 4 H 2 in the presence of water. ... Ruthenium catalysts were used for the reduction of alkenes using sodium borohydride as the stoichiometric reducing agent.