Anionic Cyclization of (N,N-Dimethylamino)[2-(prop-2-yn-1-yloxy)aryl]acetonitriles
作者:Andrzej Jończyk、Tadeusz Zdrojewski、Joanna Musielak
DOI:10.1055/s-0028-1088061
日期:2009.6
conditions using powdered sodium hydroxide and benzyltriethylammonium chloride as catalyst in dimethyl sulfoxide to afford mixtures of a methylenechromane and a methylchromene via favored 6-exo-dig and 6-endo-dig processes, respectively. Several of the chromenes rearranged into benzofuranone derivatives during column chromatography on alumina and the formation of these is rationalized. phase-transfer
(N,N-二甲基氨基)[2-(丙-2-炔-1-基氧基)芳基]乙腈的环化反应是在相转移条件下,使用氢氧化钠粉末和苄基三乙基氯化铵作为催化剂的二甲基亚砜溶液提供的。分别通过有利的6- exo- dig和6- endo- dig工艺制备亚 甲基苯并二甲基亚甲基。在氧化铝上进行柱色谱分析时,几种色酮重排成苯并呋喃酮衍生物,并且合理地形成了这些色酮。 相转移催化-碳负离子-环化-杂环-分子内乙烯基化