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Substituent-Oriented Synthesis of Substituted Pyrazoles/Chromeno[3,2-c]pyrazoles via Sequential Reactions of Chromones/3-Chlorochromones and Tosylhydrazones
- Dai, Tianzi, Li, Qunyi, Zhang, Xiaofei, Yang, Chunhao
- Journal of organic chemistry 2019 v.84 no.9 pp. 5913-5921
- chemical reactions, chemical structure, chemoselectivity, organic chemistry, pyrazoles
- A facile and efficient synthetic strategy for the chemoselective synthesis of monocyclic/tricyclic-fused pyrazoles was developed, and it was oriented by different 3-position substituents (H or Cl) on the chromones. The reaction proceeded in a one-pot sequential way with a broad substrate scope and moderate to excellent yields.