Synthesis of 3-aryl-4, 5-dihydro-5-hydroxy-1,2-oxazoles by reaction of substituted benzonitrile oxides with the enolate ion of acetaldehyde
作者:L. Di Nunno、L. Di Nunno、A. Scilimati
DOI:10.1016/s0040-4020(01)86800-9
日期:1987.1
By reaction of substituted benzonitrile oxides with the enolate ion of acetaldehyde (quantitatively generated by the known cycloreversion of THF in the presence of n-butyllithium) a number of 3-aryl-4,5-dihydro-5-hydroxy-1, 2-oxazoles (previously unknown or, in two cases, only synthesized by different procedures) have been isolated in high yields. Treatment of such hydroxyisoxazolines with some common
通过使取代的苄腈氧化物与乙醛的烯醇盐离子反应(由正丁基锂存在下已知的THF环还原定量地产生),可以生成许多3-芳基-4,5-二氢-5-羟基-1,2-高产率地分离了恶唑(以前未知,或者在两种情况下,仅通过不同的方法合成)。用一些常见的碱处理此类羟基异恶唑啉可使其以高收率转化成相应的异恶唑。