The mysterious cyclizations of gold: An asymmetric gold(I)‐catalyzed formal [3+3] cycloaddition of 2‐(1‐alkynyl)‐2‐alken‐1‐ones with nitrones has been developed. Compound 1 was found to be an effective and reliable chiral catalyst, as well as the commonly used 2, for this gold‐catalyzed reaction. Tf=trifluoromethanesulfonyl.
mesoporous SBA‐15 supported chiral phosphine gold (I) complexes were successfully developed. The gold(I) complexes were covalently immobilized on mercaptopropyl modified SiO2 surface through radical reaction. In this way, the chiral carbon and chiral sulfur of the homogenous catalyst were perfectly remained in situ. And thus, the prepared catalysts demonstrated highly effective asymmetric cycloaddition activity