A General Synthesis of Quinoline-2,5,8(1H)-triones via Acylation of 2,5-Dimethoxyaniline with S-tert-Butyl Thioacetates by Application of the Knorr Cyclization
A General Synthesis of Quinoline-2,5,8(1H)-triones via Acylation of 2,5-Dimethoxyaniline with S-tert-Butyl Thioacetates by Application of the Knorr Cyclization
The Directed Lithiation Route to 2-Amino-3-alkylquinones: Highly Regioselective Introduction of Electrophiles at the C-7 Position of 2(1<i>H</i>)-Quinolinones
An ortho-directedlithiation strategy starting from 2-ami- no-1,4-dimethoxybenzene derivatives allowed the efficient prepa- ration of 2-amino-3-alkylbenzoquinone derivatives. This method was also successful in the case of 6-pivaloylamino-4-methyl-5,8- dimethoxycarbostyril derivatives, in spite of the fact that two other modes of lithiation are possible, and allowed the preparation of de- rivatives