A highly efficient and green cascade synthesis of 3-methyl-substituted-4-hydroxy-1-methyl-quinolin-2(1H)-ones under solvent- and catalyst-free conditions
作者:Subrahmanya Ishwar Bhat、Darshak R. Trivedi
DOI:10.1039/c3ra45208e
日期:——
protocol for the synthesis of 3,3′-methanediylbis(4-hydroxy-1-methylquinolin-2(1H)-one) (MDBHQ) derivatives and 3-((2-amino-6-oxocyclohex-1-enyl)methyl)-4-hydroxy-1-methylquinolin-2(1H)-one (AOCHQ) derivatives has been developed via a cascade Knoevenagel–Michael reaction. The products were obtained in high yield under neat reaction conditions without any work-up or chromatographicpurification. The generality
Reactions of Heterocyclic Quinone Methides: 1-Methyl-3-methylene-2,4(1<i>H</i>,3<i>H</i>)-quinolinedione
作者:M. A. Chauncey、M. F. Grundon
DOI:10.1055/s-1990-27077
日期:——
1-Methyl-3-methylene-2,4(1H,3H)-quinolinedione (2), prepared from 4-hydroxy-1,3-dimethyl-2 (1H)-quinolinone (1) and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) gives the dimer 3. Compound 2 also reacts in situ with 2,2-dimethyl-2H-1-benzopyran and with isopropenyl acetate to give Diels-Alder cycloaddition products.