反应详情

According to example 30, by reacting 7-bromoacetyl-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid ethyl ester with 2-[N-(2-acetoxyethyl)-N-acetylamino]thioacetamide in ethanol gave 1-ethyl-6-fluoro-1,4-dihydro-7-[2-[[N-(2-acetoxyethyl)-N-acetylamino]methyl]-4-thiazolyl]-4-oxo-3-quinolinecarboxylic acid ethyl ester, mp 148°-152° C., resolidified and melted 164°-165° C., which was hydrolyzed with refluxing 6N hydrochloric acid to afford the titled compound, mp 290° C. (dec).