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|Title:||The reaction of aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione under solvent-free grinding conditions|
|Keywords:||aromatic aldehydes;5,5-dimethyl-1,3-cyclohexanedione;2,2′-arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexen-1-one);1, 8-dioxooctahydroxanthene|
|IPC Code:||Int.Cl.7 C 07 D|
|Abstract:||The reaction of aromatic aldehyde 1 and 5,5-dimethyl-1,3-cyclohexanedione 2 under solvent-free and solid state conditions has been catalyzed by KF/Al2O3 or silica sulfate and yields two products: 2,2′-arylmethylene bis(3-hydroxy-5,5- dimethyl-2-cyclohexen-1-one) 3 and 1, 8-dioxooctahydroxanthene 4 and their derivatives. In addition, 2-amino-4-aryl-3-cyano-7,7-dimethyl-5-oxo-4H-5,6,7,8-tetrahydrobenzo[b]pyran 5 is also obtained in this condition. This method provides several advantages such as good yield (61-93%), simple work-up procedure and is environment friendly.|
|Appears in Collections:||IJC-B Vol.45B(02) [February 2006]|
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