Takushi Kurihara, Keiko Nasu, Kyoko Mihara
1983
Citations
0
Influential Citations
2
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
The synthesis of 1,4-dihydro-1-methoxy or ethyl -2-methyl-4-oxo-3-quinolineglyoxylic acid derivatives are described. α-Acetoxy-1,4-dihydro-1-hydroxy-2-methyl-4-oxo-3-quinolineacetic acid esters (7a, 7a), which are key intermediates, were prepared by catalytic hydrogenation of 2-acetoxy-3-acetyl-4-hydroxy-4-(2-nitrophenyl) crotonic acid lactone (6) in methanol or ethanol.