Conjugated Vinylgold(I)-Vinylideneruthenium(II) Complexes and Related Organoruthenium Compounds: Stable Analogues of Intermediates Proposed in Dual Gold Catalysis
作者:Marcel Wieteck、Mie Højer Larsen née Vilhelmsen、Pascal Nösel、Jürgen Schulmeister、Frank Rominger、Matthias Rudolph、Markus Pernpointner、A. Stephen K. Hashmi
DOI:10.1002/adsc.201600255
日期:2016.4.28
species with a phenyl group on the second alkyne provided vinylruthenium(II) complexes in which the ruthenium was still bound to the same carbon as in the starting material, with a tert‐butyl group on the second alkyne vinylruthenium(II) complexes in which the ruthenium has migrated to another carbon, were obtained. This reactivity mimics the initial steps suggested for dual gold catalysis with these
Cyclization of carbonyl substituted enyne-allenes: C2-C6-cyclization induced by heat or by addition of samarium(II) iodide, samarium(III) chloride, or boron trifluoride
作者:Michael Schmittel、Marc Strittmatter
DOI:10.1016/s0040-4020(98)00847-3
日期:1998.11
Under a variety of conditions the reaction of enyne-allenes with carbonyl substituents at the allene and phenyl ort-butyl groups at the alkyne terminus afforded productsvia the new C2-C6-cyclization. Products of the Myers-Saito-cyclization were not detected.
The Gold(I)-Mediated Domino Reaction to Fused Diphenyl Phosphoniumfluorenes: Mechanistic Consequences for Gold-Catalyzed Hydroarylations and Application in Solar Cells
作者:Sebastian Arndt、Jan Borstelmann、Rebeka Eshagh Saatlo、Patrick W. Antoni、Frank Rominger、Matthias Rudolph、Qingzhi An、Yana Vaynzof、A. Stephen K. Hashmi
DOI:10.1002/chem.201800460
日期:2018.6.4
involving a phosphinoauration and a gold‐catalyzed 6‐endo‐digcyclization step, was developed. Starting from modular and simple‐to‐prepare phosphadiynes, π‐extended phosphoniumfluorenes were synthesized. The mechanistic proposal was supported by kinetic measurements and by the trapping of key intermediates. These led to important conclusions for the gold‐catalyzedhydroarylation mechanism. Cyclic voltammetry
作者:Pascal Nösel、Laura Nunes dos Santos Comprido、Tobias Lauterbach、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1021/ja4085385
日期:2013.10.16
In the presence of a gold catalyst an unprecedented oxidativecyclization of diynes takes place. The reaction cascade is initiated by an oxygen transfer from a N-oxide onto a gold-activated alkyne. The formed α-oxo carbene is transferred across the second alkyne yielding a stabilized vinyl carbene/cation. Alkyl migration or sp(3)-CH insertion then terminates the catalytic cycle by formation of highly
Simple Gold-Catalyzed Synthesis of Benzofulvenes-<i>gem</i>-Diaurated Species as “Instant Dual-Activation” Precatalysts
作者:A. Stephen K. Hashmi、Ingo Braun、Pascal Nösel、Johannes Schädlich、Marcel Wieteck、Matthias Rudolph、Frank Rominger
DOI:10.1002/anie.201109183
日期:2012.4.27
Alkyl‐substituted diynes deliver benzofulvenes in a unique gold‐catalyzed reaction. The catalytic cycle involves the formation of gold acetylides by alkynyl C–H activation, the formation of vinylidene gold(I) intermediates by dual activation, and alkyl C–H activation by the vinylidene gold(I) species. gem‐Diaurated species obtained from the catalysis reactions prove to be highly active catalysts for