Abstract
AbstractPolyethylene glycol (PEG‐400) was proved a highly efficient and green solvent reaction medium for the synthesis of series of novel 3,6‐dimethyl‐4,7‐dihydro‐2H‐pyrazolo[3,4‐b]pyridine derivatives with excellent yields by a three‐component reaction of 1H‐pyrazol‐3‐amino‐5‐methyl, various aromatic or heteroaromatic aldehydes and chosen CH‐active compounds under catalyst‐free conditions via one‐pot strategy. This transformation is compatible with a broad diversity of functional group tolerance. Rapid synthesis, mild reaction conditions, high yields, no catalyst or column chromatography, cost‐effectiveness and green solvent are the benefits of this protocol.
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