描述了金催化二炔级联环化,用于合成先前未探索的 C-N 轴向手性N-芳基苯并[ g ]吲哚。这种转变是通过中心到轴的手性转换策略实现的。手性转化表现出高效率。除了单一的C-N手性轴外,还提供了带有C-N和C-C手性轴的N-芳基苯并[ g ]吲哚。制备了标题化合物衍生的单膦配体,并在 Pd 催化的不对称烯丙基取代中进行了评估,显示出优异的手性诱导能力。
A novel synthesis of quinolizidines by a cationic gold‐catalyzed double cyclization cascade has been developed. The reaction was initiated by the gold‐catalyzed 6‐exo‐dig cyclization of ynamides, which was followed by a second cyclization of an enamide intermediate to provide the corresponding quinolizidine derivatives. The utility of this reaction was demonstrated by application to the synthesis of
Dual Photoredox and Gold Catalysis: Intermolecular Multicomponent Oxyarylation of Alkenes
作者:Matthew N. Hopkinson、Basudev Sahoo、Frank Glorius
DOI:10.1002/adsc.201400580
日期:2014.9.15
developed using a dual gold and photoredoxcatalytic system. Inexpensive organic dyes could be employed as the photocatalyst using aryldiazonium salts, while the combination of gold and iridium catalysts allowed for diaryliodonium compounds to be employed as the source of the arene coupling partner. In both cases, α‐arylated ether products were generated under remarkably mild conditions using readily accessible