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 tetheredsulfoxides. The result is a Ru‐catalyzed oxidativetransformation of terminalalkynes 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