F. Richard et al., ZEOLITE CATALYZED ACYLATION OF HETEROCYCLIC-COMPOUNDS .3. COMPARISON BETWEEN BENZOFURAN AND 2-METHYLBENZOFURAN, Journal of molecular catalysis. A, Chemical, 101(3), 1995, pp. 167-169
Benzofuran and 2-methylbenzofuran were acylated by acetic anhydride in
the presence of Y-zeolite as catalyst (60 degrees C, atmospheric pres
sure) with a 43% and 95% yield respectively.