sodium carbonate; tetrabutyl-ammonium chloride in toluene T=112°C; 5 h; Product distribution / selectivity;

1: 3-methyl-2-butenoic acid With water; potassium carbonate; tetrabutyl-ammonium chloride in toluene T=90 - 95°C; 0.5 h; 2: 2-isopropenyl-5-methyl-4-hexene-1-yl methanesulfonate in toluene T=90 - 95°C; 16 h; Product distribution / selectivity;