A novel solid-stateMichaeladdition between pyrazolone 1 and 4-arylidenepyrazolones 2 at ambient temperature produced Michael adducts, 4,4′-arylidenebis(3-methyl-1-phenyl-5-pyrazolones) 3. Pyrazolones 3 formed salts 4 with Cu2+ in solution, indicating the enolic structure of the pyrazolone rings. The reactivity of 2 with 1 is discussed in terms of the electronic and steric effects of the substituent
Solid‐State Synthesis of 4‐[(Indol‐3‐yl)‐arylmethyl]‐1‐phenyl‐3‐methyl‐5‐pyrazolones by Catalysis of Molecular Iodine
作者:Min Xia、Yuedong Lu
DOI:10.1080/00397910600640388
日期:2006.8
4-[(Indol-3-yl)-arylmethyl]-1-phenyl-3-methyl-5-pyrazolones could be smoothly and effectively obtained in good yields through the iodine-catalyzed reactions under solid-state conditions at room temperature. The three-component approach in a one-pot procedure was reported for the first time. A possible mechanism was suggested to elucidate the remarkable reaction selectivities.