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
Booth, Paul M.; Fox, Christina, M. J.; Ley, Steve V., Journal of the Chemical Society. Perkin transactions I, 1987, p. 121 - 130
作者:Booth, Paul M.、Fox, Christina, M. J.、Ley, Steve V.
DOI:——
日期:——
Regiospecific alkylation of β-ketothioesters and use in the synthesis of acyl-tetronic acids
作者:Paul M. Booth、Christina M.J. Fox、Steven V. Ley
DOI:10.1016/s0040-4039(00)94065-6
日期:1983.1
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
作者:Pilar López-Alvarado、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1055/s-1998-2014
日期:1998.2
An efficient synthesis of quinoline-2,5,8(1H)-triones bearing alkyl groups at C3 and/or C4 is described. The reaction sequence employed involves Knorr cyclization of 2,5-dimethoxyanilides into 5,8-dimethoxyquinoline systems, followed by oxidative demethylation with cerium ammonium nitrate. The starting 2,5-dimethoxyanilides were prepared by chemoselective acylation by regioselective alkylation of S-tert-butyl acetothioacetate (1) at C2 and/or C4. The introduction of electrophiles other than alkyl groups at C2 on 1 was also studied.