1: 82 percent / toluene / Heating 2: β-alanine; glacial acetic acid / hexane / Heating 3: 3-ethyl-5-(2-hydroxyethyl)-4-methylthiazolium bromide; triethylamine / ethanol / Heating 4: pivalic acid / tetrahydrofuran; toluene; heptane / Heating View Scheme

1: β-alanine; glacial acetic acid / hexane / Heating 2: 3-ethyl-5-(2-hydroxyethyl)-4-methylthiazolium bromide; triethylamine / ethanol / Heating 3: pivalic acid / tetrahydrofuran; toluene; heptane / Heating View Scheme

1: 3-ethyl-5-(2-hydroxyethyl)-4-methylthiazolium bromide; triethylamine / ethanol / Heating 2: pivalic acid / tetrahydrofuran; toluene; heptane / Heating View Scheme

2,2,2-trimethylacetic acid in tetrahydrofuran; n-heptane; toluene Cycloaddition; condensation; Heating;

hydrogen; acetic acid; palladium on activated charcoal in ethyl acetate Hydrogenolysis; catalytic hydrogenation; P=2585.74 Torr; 34 h;