in tetrahydrofuran; water byproducts: HCl, H2; (N2); addn. of concd. aq. soln. of HI (4 equiv.) to soln. of Ru complex(1 equiv.) in THF; reflux for 5 h; filtration, evapn., washing with H2O, tacking up in CH2Cl2, drying withMgSO4, filtration, evapn.;