The Role of Acetylides in Dual Gold Catalysis: A Mechanistic Investigation of the Selectivity Difference in the Naphthalene Synthesis from Diynes
作者:Katharina Graf、Philip D. Hindenberg、Yusuke Tokimizu、Saori Naoe、Matthias Rudolph、Frank Rominger、Hiroaki Ohno、A. Stephen K. Hashmi
DOI:10.1002/cctc.201300820
日期:2014.1
Under the conditions of dual activation catalysis with oxygen nucleophiles, β‐substituted naphthalenes were obtained from 1,2‐diethinyl arenes. Mechanistic studies, which include isotope labeling experiments, support that dual activation leads to β‐substituted naphthalenes, whereas α‐naphthalenes are formed by π activation only, and no gold acetylide or dual activation is involved in the formation
在氧亲核试剂的双重活化催化条件下,β-取代的萘是从1,2-二乙炔基芳烃中获得的。包括同位素标记实验在内的机理研究支持双重活化导致β-取代的萘,而α-萘仅通过π活化形成,而乙炔化金或双重活化均不涉及α-取代产物的形成。在导致二苯并戊戊二烯的底物上进行的其他实验支持了这些机理的见解。