Highly Efficient Gold-Catalyzed Synthesis of Dibenzocycloheptatrienes
作者:Daniel Pflästerer、Eva Rettenmeier、Severin Schneider、Edgar de Las Heras Ruiz、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/chem.201402015
日期:2014.5.26
Dibenzocycloheptatrienes are obtained by a gold‐catalyzed7‐exo‐dighydroarylation protocol in a highly efficient manner. The gold‐catalyzed reaction usually gives the products in high yields and excellent selectivity. This procedure provides an easy and efficient access to dibenzocycloheptanoids, which are an interesting and unique class of natural products. This was underlined by the first total
Mechanistic Insights into the Post‐Cyclization Isomerization in Gold‐Catalyzed 7‐
<i>exo</i>
‐
<i>dig</i>
‐Hydroarylations
作者:Daniel Pflästerer、Sören Schumacher、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/chem.201501075
日期:2015.8.3
control of the reaction times in most cases. Mechanistic studies demonstrated that a slow isomerization is also possible with the gold catalyst at elevated temperatures, but much faster isomerization rates were observed with acidic additives. An observed initiation period for the gold‐catalyzedisomerization indicates that not the homogenous catalyst, but a decomposition product of it may be the catalytically