Efficient PPA-SiO2-catalyzed Synthesis of β-enaminones Under Solvent-Free Conditions

Abstract

An efficient method has been developed for the synthesis of β-enaminones under solvent-free reaction conditions using PPA-SiO 2 as catalyst. The reaction yields were good to excellent (up to 90%). This methodology affords high selectivity and good tolerance of a variety of different functional groups present on both aromatic and aliphatic amines. In addition, the methodology is environmentally benign and cost-effective due to absence of solvent and easy work-up.

Design of a graphene oxide-SnO2 nanocomposite with superior catalytic efficiency for the synthesis of β-enaminones and β-enaminoesters

“…Table 3 shows the comparison of reported catalyst with our catalyst for the synthesis of b-enaminones and b-enaminoesters under the same conditions. 91 These results conrmed that our GO-SnO 2 catalyst is more effective and less time consuming for synthesis of b-enaminones and b-enaminoesters. 91 These results conrmed that our GO-SnO 2 catalyst is more effective and less time consuming for synthesis of b-enaminones and b-enaminoesters.…”

“…From Table 3, it can be seen that our catalyst exhibited higher yields in lesser time compared to the other reported system such as Cu/AlO(OH), 87 Ag/Fe 3 O 4 @meso-SiO 2 , B 2 O 3 /Al 2 O 3 , 90 Ag nanoparticle 28 and PPA-SiO 2 . 91 These results conrmed that our GO-SnO 2 catalyst is more effective and less time consuming for synthesis of b-enaminones and b-enaminoesters.…”