A new strategy for the synthesis of fluorinated 3,4-dihydropyrimidinones
作者:Santos Fustero、Silvia Catalán、José Luis Aceña、Carlos del Pozo
DOI:10.1016/j.jfluchem.2009.06.001
日期:2009.12
A new family of 3,4-dihydropyrimidinones (DHPMs) bearing fluorinated substituents at C6 have been prepared from gem-difluorinated nitriles, alkyl 3-butenoates and iso(thio)cyanates. This novel Biginelli-type process relies on the γ-addition of the ester-derived enolate to fluorinatednitriles. A tandem nucleophilic addition aza-Michael reaction sequence completes the synthetic process.