4-Hydroxy-2-quinolones. 167*. Study of the reaction of ethyl 1-alkyl-substituted 4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylates with phosphorus oxychloride
作者:I. V. Ukrainets、N. L. Bereznyakova、A. A. Davidenko、S. V. Slobodzian
DOI:10.1007/s10593-009-0367-7
日期:2009.8
Prolonged treatment of ethyl 1-alkyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylates with refluxing phosphorus oxychloride gives not only the target 4-chloro derivatives but is also accompanied by a marked loss of the 1-N-alkyl groups to form the side product 2,4-dichloro-3-ethoxycarbonylquinoline.
用回流的三氯氧化磷长时间处理乙基1-烷基-4-羟基-2-羟基-2-氧代-1,2-二氢喹啉-3-羧酸乙酯不仅得到目标4-氯衍生物,而且还伴随着1-的明显损失。 N-烷基形成副产物2,4-二氯-3-乙氧基羰基喹啉。