Studies on quinones. XIII. Synthesis and reactivity in acid medium of cyclic<i>O,N</i>-ketals derived from acylbenzoquinones and enamines
作者:RaÚL Cassis、Ricardo Tapia、Jaime A. Valderrama
DOI:10.1002/jhet.5570210346
日期:1984.5
A series of cyclic O,N-ketals 14–20 derived from benzo[b]furan has been synthesized by reaction of acylbenzoquinones and enamines. Compounds 14–20, in warm aqueous sulfuric acid, react to give elimination or rearrangement products depending on the structure of the substrate. The behavior of heterocycles 14–20 in acid conditions is interpreted on the basis of the arrangement of the carbon substituents
通过酰基苯醌和烯胺的反应合成了一系列衍生自苯并[ b ]呋喃的环状O,N-缩酮14-20。化合物14–20在温暖的硫酸水溶液中,根据底物的结构反应生成消除或重排产物。根据呋喃环上碳取代基的排列,可以解释在酸性条件下杂环14-20的行为。