Ruthenium-Catalyzed Oxidative Transformations of Terminal Alkynes to Ketenes By Using Tethered Sulfoxides: Access to β-Lactams and Cyclobutanones
作者:Youliang Wang、Zhitong Zheng、Liming Zhang
DOI:10.1002/anie.201403796
日期:2014.9.1
The oxidation of in situ generated Ru vinylidenes to ketenes is realized with tethered sulfoxides. The result is a Ru‐catalyzed oxidative transformation of terminal alkynes to highly valuable ketenes. Moreover, the ketenes generated here were shown to undergo characteristic ketene [2+2] cycloaddition reactions with tethered alkenes and external imines, yielding synthetically versatile bicyclic cyclobutanones
用束缚的亚砜实现原位生成的Ru亚乙烯基的氧化为烯酮。结果是钌催化的末端炔烃氧化转化为高价值的烯酮。此外,显示此处生成的乙烯酮与链状烯烃和外部亚胺发生特征性的乙烯酮[2 + 2]环加成反应,分别生成合成通用的双环环丁酮和β-内酰胺。