Journal of the Chemical Society. Chemical communications p. 519 - 520 (1995)
Update date:2022-08-25
Topics:
Armengol, Elvira
Cano, Maria L.
Corma, Avelino
Garcia, Hermenegildo
Navarro, Maria T.
Owing to its large molecular size, alkylation of 2,4-di-tert-butylphenol with cinnamyl alcohol does not take place using HY zeolite (pore opening 7.4 Angstroem) as catalyst even after controlled steaming treatment to increase its mesoporosity; by contrast, novel mesoporous aluminosilicate MCM-41 catalyses this reaction giving rise to 6,8-di-tert-butyl-2-phenyl-2,3-dihydro<4H>benzopyran (arising from intramolecular cyclization of the primary cinnamylphenol) together with 4-tert-butylphenol and small amounts of 6-tert-butyl-2-phenyl-2,3-dihydro<4H>benzopyran.
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