作者:Susan E. Hagen、John M. Domagala
DOI:10.1002/jhet.5570270616
日期:1990.9
A series of 5-methyl-4-oxo-3-quinolinecarboxylic acids was prepared in which the eight-position was substituted with fluorine, chlorine, methyl, or hydrogen. These quinolones were synthesized from the appropriate 2-methyl-3,4,6-trifluorobenzoic acids which were derived from oxazolines 8 and 16. The oxazoline moiety served as both an ortho-director (where feasible) and a protecting group; a trimethylsilyl
制备了一系列5-甲基-4-氧代-3-喹啉羧酸,其中八个位置被氟,氯,甲基或氢取代。这些喹诺酮是由衍生自恶唑啉8和16的合适的2-甲基-3,4,6-三氟苯甲酸合成的。恶唑啉部分既是邻位导向基团(在可行的情况下)又是保护基团;三甲基甲硅烷基部分被用来封闭分子中最酸性的位点。