Ruthenium-catalyxed tandem cyclization-decarbonylation of terminal 1,6-diynes give exo -alkykidenecyclopentanes. The starting point of this process is likely to be the formation of an Ru-vinylidene complex.
Efficient Generation and Increased Reactivity in Cationic Gold via Brønsted Acid or Lewis Acid Assisted Activation of an Imidogold Precatalyst
作者:Junbin Han、Naoto Shimizu、Zhichao Lu、Hideki Amii、Gerald B. Hammond、Bo Xu
DOI:10.1021/ol501443m
日期:2014.7.3
Brønsted or Lewis acid assisted activation of an imidogold precatalyst (L-Au-Pht, Pht = phthalimide) offers a superior way to generate cationic gold compared with the commonly used silver-based system. It is also broadly applicable for most common gold-catalyzed reactions. For reactions that require milder conditions, milder acids can be used for optimized efficiency.