Synthesis of 3-Alkanesulfonyl-4(1H)-quinolinones from 3-Alkanesulfonyl-4-alkylsulfanylquinolines
作者:Leszek Skrzypek、Andrzej Maślankiewicz、Kinga Suwińska
DOI:10.3987/com-10-12133
日期:——
3-Alkanesulfonyl-4-alkylsulfanylquinolines (4) were transformed to 3-alkanesulfonyl-4(1H)-quinolinones (5) and (6). 1H-Derivatives 5 were obtained by acidic hydrolysis of compounds 4. 1-Alkyl derivatives 6 were prepared in three ways: a) via 1-alkylquinolinium salts 7 followed by their acidic hydrolysis to 6; b) in one-pot reactions of compounds 4 with alkyl bromides under Phase Transfer Catalysis (PTC) conditions; or c) by alkylation of 1H-derivatives 5 with alkyl bromides under PTC conditions.