Phosphite-Gold(I)-Catalyzed [2+2] Intermolecular Cycloaddition of Enol Ethers with N-Allenylsulfonamides
作者:Samuel Suárez-Pantiga、Cristina Hernández-Díaz、María Piedrafita、Eduardo Rubio、José M. González
DOI:10.1002/adsc.201200043
日期:2012.6.18
Addition of catalytic amounts of a phosphite‐based gold(I) catalyst efficiently triggers the intermolecular [2+2] cycloaddition of allenes and alkenes substituted by electron‐donor groups. The reaction is fast and furnishes cyclobutane derivatives in a stereoselective manner using low catalyst loadings. Besides, the same catalyst selectively affords homodimerization products from the starting allene