[4 + 2] Cycloaddition of thiophene S-monoxides to activated methylenecyclopropanes
作者:Thies Thiemann、Daisuke Ohira、Yuanqiang Li、Tsuyoshi Sawada、Shuntaro Mataka、Karsten Rauch、Mathias Noltemeyer、Armin de Meijere
DOI:10.1039/b003850o
日期:——
determined as being endo,syn. The Wittig olefination of cyclopropanone hemiacetal to generate the methylenecyclopropanes and the subsequent cycloaddition can be carried out in a one-pot operation. This procedure is one of many potential one-pot or multi-component reactions involving stabilized phosphoranes. A further example of this type of reaction is shown in the novel desilylation–Wittig olefination