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A convenient, expedient and efficient method for the synthesis of poly substituted dihydro-2-oxypyrroles is described via the one-pot four-condensation of dialkyl acetylenedicarboxylate, formaldehyde, and amines (aromatic and aliphatic) at ambient temperature in the presence of Manganese (II) Nitrate Tetrahydrate (Mn(NO 3 ) 2 .4H 2 O) as a cost effective and inexpensive catalyst. The present methodology provides a simple and eco-safe procedure for the synthesis of poly substituted dihydro-2-oxypyrroles with some additional advantages, such as good to high yields , short reaction times, avoidance of hazardous or toxic catalysts , simplicity of operating and work-up procedures with no necessity for chromatographic purification steps. Normal 0 false false false EN-US X-NONE AR-SA

makara journal of science/makara journal of science

Eco-friendly and Convenient Synthesis of Biologically Active Polysubstituted Dihydro-2-Oxypyrroles Using Manganese (II) Nitrate Tetrahydrate at Ambient Temperatures