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
Photosensitizer-Free, Gold-Catalyzed C-C Cross-Coupling of Boronic Acids and Diazonium Salts Enabled by Visible Light
作者:Sina Witzel、Jin Xie、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/adsc.201700121
日期:2017.5.2
The first photosensitizer‐free visiblelight‐driven, gold‐catalyzed C–C cross‐couplings of arylboronic acids and aryldiazonium salts are reported. The reactions can be conducted under very mild conditions, using a catalytic amount of tris(4‐trifluoromethyl)phosphinegold(I) chloride [(4‐CF3‐C6H4)3PAuCl] with methanol as the solvent allowing an alternative access to a variety of substituted biaryls in
据报道,第一个无光敏剂的可见光驱动的,金催化的芳基硼酸和芳基重氮盐的CC交联反应。该反应可以在非常温和的条件下进行,使用催化量的三(4-三氟甲基)膦金(I)氯化物[(4-CF 3 -C 6 H 4)3 PAuCl],甲醇为溶剂,可以选择使用以中等至优异的收率合成各种取代的联芳基,并具有宽泛的官能团耐受性。
Trans Influence of Ligands on the Oxidation of Gold(I) Complexes
作者:Yangyang Yang、Lukas Eberle、Florian F. Mulks、Jonas F. Wunsch、Marc Zimmer、Frank Rominger、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1021/jacs.9b09363
日期:2019.10.30
tetra-coordinate gold(I) with the oxidizing reagent as one of the ligands as an intermediate. A computational study of the geometry of (Phen)R3PAu(I)NTf2 complexes shows that the accessibility of such tri-coordinate species shows a good correlation with the 'trans influence' of phosphine ligands: the weak σ-donating phosphine ligands promote tri-coordination of gold(I) complexes. The oxidative addition