作者:Leiv K. Sydnes、Rustem Isanov、Myagmarsuren Sengee、Francesco Livi
DOI:10.1080/00397911.2012.748076
日期:2013.11.2
Abstract α,β-Unsaturated acetylenic γ-hydroxyketones have been shown to react with ethyl acetoacetate in a Michael-addition fashion and subsequently undergo cyclization followed by dehydration to give substituted furans with a predictable regiospecificity. The yields were good to excellent. A mechanism for the transformation is proposed, and this mechanism explains why furan formation does not take
摘要 α,β-不饱和炔属 γ-羟基酮已被证明以迈克尔加成方式与乙酰乙酸乙酯反应,随后进行环化和脱水,得到具有可预测区域特异性的取代呋喃。产量从好到极好。提出了一种转化机制,该机制解释了为什么当相同的不饱和酮用 α-甲基化乙酰乙酸酯和丙二酸二乙酯处理时不会形成呋喃。[本文提供补充材料。访问出版商的 Synthetic Communications® 在线版,获取以下免费补充资源:完整的实验和光谱细节。] 图形摘要