Velazquez-Herrera, Franchescoli D.; Gonzalez-Rodal, Daniel; Fetter, Geolar; Perez-Mayoral, Elena published the article 《Towards highly efficient hydrotalcite/hydroxyapatite composites as novel catalysts involved in eco-synthesis of chromene derivatives》. Keywords: chromene derivative green synthesis hydrotalcite hydroxyapatite composite catalyst property.They researched the compound: tert-Butyl 2-cyanoacetate( cas:1116-98-9 ).Synthetic Route of C7H11NO2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1116-98-9) here.
A series of hydrotalcite/hydroxyapatite composites were investigated as novel catalysts in the green synthesis of chromenes in high conversions (up to 78% after 2 h), under solvent-free and mild conditions, from salycilaldehydes and cyano compounds Materials were prepared by three different methods: impregnation of hydroxyapatite over hydrotalcite already crystallized; impregnation of hydrotalcite over hydroxyapatite and crystallization of both the components simultaneously. The composites resulted in the materials with high activity and selectivity for the 2-amino-4H-chromene synthesis. The catalytic performance was depending on the catalyst synthesis method and governed by the basicity of the samples and textural properties also varying as a function of the used cyano compound Observed reactivity was attributed to the high dispersion of the hydrotalcite particles on the hydroxyapatite component, resulting in a considerable increase of the surface areas from 3 to 154 m2/g, and thus, given rising to a high concentration of superficial hydroxyls reaching 7.1 x 1014 sites/g catalyst. Broad pore size distributions in composites enabled a rapid diffusion of the reactants to reach the basic hydroxyl sites.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem