作者:Balázs Budai、Alexandre Leclair、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201904263
日期:2019.7.22
Reported here is a copper‐catalyzed 1,2‐methoxy methoxycarbonylation of alkenes by an unprecedented use of methyl formate as a source of both the methoxy and the methoxycarbonyl groups. This reaction transforms styrene and its derivatives into value‐added β‐methoxy alkanoates and cinnamates, as well as medicinally important five‐membered heterocycles, such as functionalized tetrahydrofurans, γ‐lactones
此处报道了通过空前使用甲酸甲酯作为甲氧基和甲氧基羰基的来源,铜被烯烃催化的1,2-甲氧基甲氧基羰基化。该反应将苯乙烯及其衍生物转变成增值的β-甲氧基链烷酸酯和肉桂酸酯,以及具有医学重要性的五元杂环,例如功能化的四氢呋喃,γ-内酯和吡咯烷。三元β-二酮基亚胺-Cu I‐苯乙烯配合物具有NMR光谱学和X射线晶体学分析的全部特征,能够催化相同的转化。这些发现表明,富电子烯烃与铜的预配位可能在加速亲核自由基向富电子烯烃的加成中起重要作用,并且可能在基于自由基的新型转化设计中具有普遍意义。