A simple and regioselective synthesis of 2-chloro-3-formylquinoline [1] by the cyclisation of N-aryacetamide has been reported by the Vilsmeier Haack reaction/cyclisation. 2-Chloro-3-formylquinoline, the formyl group shows condensation with variety of haloanilines & hydrazones and forming schiff bases N-[(E)-(2-chloroquinolin-3yl)methylidene]anilides [2a-e] which are further subjected to fluorescence study.
Haloanilines, Formylation, Vilsmeier Haack reaction, quinoline, Schiff bases