Gold(I)-Catalyzed Intermolecular [2+2] Cycloadditions between Allenamides and Alkenes
作者:Hélio Faustino、Paloma Bernal、Luis Castedo、Fernando López、José L. Mascareñas
DOI:10.1002/adsc.201200047
日期:2012.6.18
3‐(Propa‐1,2‐dien‐1‐yl)oxazolidin‐2‐one works as an efficient two‐carbon partner in a variety of intermolecular gold‐catalyzed [2+2] cycloadditions to alkenes. The transformation represents a simple and practical entry to highly substituted cyclobutane derivatives and takes place with complete regio‐ and stereocontrol.
Formal Intermolecular [2 + 2] Cycloaddition Reaction of Alleneamides with Alkenes via Gold Catalysis
作者:Xiao-Xiao Li、Li-Li Zhu、Wen Zhou、Zili Chen
DOI:10.1021/ol202703a
日期:2012.1.20
An efficient method was developed to construct the densely functionalized cyclobuane adducts through formal intermolecular cycloaddition of alleneamides with electron-rich olefins via gold catalysis, in which vinyl ethers/amides and electron-rich styrenes worked very well. In addition, a series of alleneamide dimerization products were prepared from the same alleneamide substrates.