Synthesis of 2,4-Bis(aryloxy)-1,5-diarylpentane-1,5-diones by Base-Mediated Tandem Reaction

[摘要]：A new, practical, base-mediated method has been developed for the synthesis of 2,4-bis(aryloxy)-1,5-diarylpentane-1,5-diones by a tandem alpha-methylenation-Michael reaction through activation of two C-Cl bonds. This method permits the use of dichloromethane instead of dibromomethane as a source of one carbon atom for the alpha-methylenation reaction. The products are useful in syntheses of polysubstituted pyridines and methylenebisbenzofurans.

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