potassium tert-butoxide in tetrahydrofuran byproducts: KCl, triphenylphosphine; under Ar; KOC(CH3)3 added to soln. of the acetic acid derivative in THF,mixt. stirred at room temp. for 1 h, Ru complex added to suspn., stirre d at room temp. for 0.5 h; evapd. under vac., residue washed with water and Et2O, dried under vac.;