| 摘要 |
PROBLEM TO BE SOLVED: To readily obtainα-methylene-γ-butyrolactones useful as a monomer for a resin from a cheap raw material in high selectivity by carrying out a gas phase catalytic reaction of specificγ-butyrolactones with aldehydes in the presence of a catalyst of a specified composition. SOLUTION: The objective compound of formula II is obtained by carrying out a gas phase catalytic reaction of a raw material containing (A) aγ- butyrolactone of formula I (R<1> to R<4> are each H, a 1-18C alkyl) and capable of having a 1-18C alkyl substituted atβ-position andγ-position, and (B) formaldehyde (derivative) in the presence of (C) a catalyst of the composition of the formula Sia Csb Wc Xd Oe [X is Ag, Nb, Mg, Al, Ni, Zn, Mo, Cr, Sb, Ti, or Pt; (a), (b), (c) and (d) are each 100, 0-10, 10-0 and 0-10 respectively; (e) is a number of oxygen atoms satisfying atomic valences of Si, Cs, W and X components].
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