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An efficient and convenient protocol for the synthesis of quinoxalines and dihydropyrazines via cyclization-oxidation processes using HClO4·SiO2 as a heterogeneous recyclable catalyst |
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| Authors: | Biswanath Das Katta Venkateswarlu Kanaparthy Suneel Anjoy Majhi |
| Institution: | Organic Chemistry Division-I, Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 007, Andhra Pradesh, India |
| Abstract: | A convenient and straightforward method has been developed for the synthesis of quinoxalines and dihydropyrazines (DHPs) using α-bromo ketones and 1,2-diamines in the presence of silica supported perchloric acid (HClO4·SiO2) at room temperature. The quinoxalines and DHPs were presumably formed via cyclization-oxidation. The catalyst works under heterogeneous conditions and can be recycled. |
| Keywords: | α-Bromoketone 1 2-Diamine HClO4· SiO2 Cyclization-oxidation processes Quinoxaline Dihydropyrazine Heterogeneous recyclable catalyst |
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