Rhodium(II)-Catalyzed Reaction of Iodonium Ylides with Conjugated Compounds: Efficient Synthesis of Dihydrofurans, Oxazoles, and Dihydrooxepines
作者:Yong Lee、Sang Yoon、Youngwan Seo、Bong Kim
DOI:10.1055/s-2004-831257
日期:——
The rhodium(II)-catalyzed reaction of iodonium ylides with a variety of conjugated compounds has been examined. With α,β-unsaturated esters and α,β-unsaturated ketones, dihydrofurans were produced in moderate yields. Reactions with acrylonitriles yield oxazoles and dihydrofurans in moderate yields, whereas reactions with 1,3-butadienes result in dihydrofurans and dihydrooxepines in good yields, respectively
已经检查了碘鎓叶立德与各种共轭化合物的铑 (II) 催化反应。使用 α,β-不饱和酯和 α,β-不饱和酮,以中等收率生产二氢呋喃。与丙烯腈反应以中等收率产生恶唑和二氢呋喃,而与 1,3-丁二烯反应分别以良好收率产生二氢呋喃和二氢氧杂环庚烷。形成这些产物的机理途径已根据环丙烷中间体或 1,3-偶极环加成机理进行了描述。