An Efficient, Three‐component One‐pot Preparation of 1,4‐Dihydropyridines Containing Novel Substituted Pyrazole under Sulfamic Acid Catalysis

Abstract An efficient approach to 1,4‐dihydropyridines containing novel substituted pyrazole is achieved via three‐component reaction of pyrazolyl aldehyde, β ‐ketoester, and ammonium acetate in one‐pot under sulfamic acid catalysis.