We have recently described a new reaction of 8-hydroxyquinolone II with 3-bromopropyne leading to 2,3-dihydro-3-methylene-7-oxo-7H-pyridol[1,2,3-de][1,4]benzoxazine-6-carboxylate IIIa, which could be used as an intermediate for preparation of antibacterically active compound IIIb. Now we extend the scope of the reaction.
我们最近描述了8-羟基喹啉II与3-溴丙炔反应的新反应,导致2,3-二氢-3-亚甲基-7-氧代-7H-吡啶并[1,2,3-de][1,4]苯并噁嗪-6-羧酸酯IIIa的形成,该中间体可用于制备具有抗菌活性的化合物IIIb。现在,我们扩展了反应的范围。