R. Sercheli et al., ENCAPSULATION OF N,N',N''-TRICYCLOHEXYLGUANIDINE IN HYDROPHOBIC ZEOLITE-Y - SYNTHESIS AND CATALYTIC ACTIVITY, Tetrahedron letters, 38(8), 1997, pp. 1325-1328
N,N',N ''-Tricyclohexylguanidine was encapsulated in hydrophobic zeoli
te Y by reacting N,N'-dicyclohexylcarbodiimide with cyclohexylamine wi
thin the supercage. The encapsulated guanidine catalyzes the addition
reaction of acetone to benzaldehyde forming 4-phenyl-4-hydroxybutan-2-
one as the principal product, as opposed to the homogeneous system whi
ch produces 4-phenyl-3-buten-2-one via condensation reaction. (C) 1997
Elsevier Science Ltd.