Beilstein J. Org. Chem.2009,5, No. 68, doi:10.3762/bjoc.5.68
catalytic activity was observed which may be attributed to the microscopic changes in the structure of the catalyst.
Conclusion
An efficient Knoevenagel condensation was achieved between a range of aromatic aldehydes and activemethylenecompounds in short time periods by using HAP–Cs2CO3 as the catalyst
Beilstein J. Org. Chem.2007,3, No. 43, doi:10.1186/1860-5397-3-43
effect, which generalizes cyclization of certain derivatives of 3-methyl-1-phenyl-2-pyrazolin-5-ones. Using this strategy a variety of fused heterocycles is obtained by the Knoevenagel condensation of 5-tert-amino-3-methyl-1-phenylpyrazolone-4-carboxal-dehyde 3 with activemethylenecompounds such as