Research Article
Natural Hydroxyapatite: Green Catalyst for the Synthesis of Pyrroles, Inhibitors of Corrosion
Table 2
Optimization of the standard reactiona.
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aAll reactions were carried out using aldehyde (2.5 mmol), amine (2.5 mmol), and 1,3-dicarbonyl compound (2.5 mmol) to nitromethane (5 mmol), t = 24 h. bIsolated yield. cReaction with AlPO4 as the catalyst. dReaction was conducted in the presence of fluoro-apatite (FAP) as the catalyst. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||