1: N,N'-di(2,4,6-trimethylphenyl)-4,5-dihydroimidazolinium chloride With potassium 2-methyl-2-butoxide in hexane; toluene T=50°C; 0.166667 h; 2: Fuuml;rstner's ruthenium indenylidene catalyst in hexane; toluene T=50°C; 18 h;

KO(C(CH3)3) in hexane byproducts: KCl, C(CH3)3OH, PCy3; using Schlenk techniques; mixing of (Mes2C3N2H5)(Cl), KO(t-Bu) and (PCy3)2Cl2Ru(CHPh) in anhyd. hexane; degassing of soln. by pulling vac. for afew minutes, heating at 60°C for 24 h in vac. with very vigorous stirring; cooling to room temp., opening the flask to air, addn. of 1:1 2-propanol:water; stirring in air for 30 min, filtration, washing with 2-propanol:water and with hexane, drying under vac. overnight, elem. anal.;

potassium hydride in tetrahydrofuran T=25°C; 3 h;

potassium hydroxide T=60°C; 1.25 h;

in methanol; chloroform

potassium hydride in tetrahydrofuran T=25°C; 1 h;