Research Article
Cobalt(II) Chloride Hexahydrate as an Efficient and Inexpensive Catalyst for the Preparation of Biscoumarin Derivatives
Table 3
Effect of solvents in reaction of 3-nitrobenzaldehyde and 4-hydroxycoumarin catalyzed by CoCl2·6H2O.
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All reactions were catalyzed by CoCl2·6H2O at 70°C. aIsolated yields. |