[PDF] CONTENTS 1) General procedure for the oxidative lactonization

CONTENTS 1) General procedure for the oxidative lactonization

of 2-butanone The mixture was heated under reflux for 48 h and then cooled to room temperature After the evaporation of the solvent, the residue was distilled to give 42 4 g (89 yield) of γ-butyrolactone as a colorless liquid; b p 55 °C/ 5 mmHg 1H NMR (270 MHz, CDCl 3) δ 2 21−2 32 (m, 2H), δ 2 50 (t, J = 8 3Hz, 2H), δ 4 35 (t, J = 7