abstract |
(57) [Problem] To provide a method for economically producing α-methylene-γ-butyrolactone using a general-purpose raw material. SOLUTION: The following general formula (1): (Wherein, R 1 , R 2 , R 3 , and R 4 represent a hydrogen atom or an organic residue), and a gas phase contact reaction between γ-butyrolactone and methyl alcohol is performed. |