Palladium-catalyzed cyclization and cross-coupling of acetylenic aryl triflates with organotin reagents
作者:Fen-Tair Luo、Ren-Tzong Wang
DOI:10.1016/0040-4039(91)80570-v
日期:1991.12
Acetylenic aryl triflates reacted readily with vinyltributyltin, allyltributyltin, 1-(trimethylsilyl)-2-(tributylstannyl)acetylene, and trimethylsilyltributyltin in the presence of a palladium catalyst to produce (Z)-indanylidene and (Z)-tetralinylidene substituted compounds, the stereospecificity of the reactions for the synthesis of these compounds being ≥98%.
Gold- or Indium-Catalyzed Cross-Coupling of Bromoalkynes with Allylsilanes through a Concealed Rearrangement
作者:M. Elena de Orbe、Margherita Zanini、Ophélie Quinonero、Antonio M. Echavarren
DOI:10.1021/acscatal.9b02314
日期:2019.9.6
The gold(I)-catalyzed reaction of bromoalkynes with allylsilanes gives 1,4-enynes in a formal cross-coupling reaction. Mechanistic studies revealed the involvement of gold(I) vinylidenes or vinylidenephenonium gold(I) cations depending on the substituent on the bromoalkyne. In the case of bromo arylalkynes, the vinylidenephenonium gold(I) cations lead to 1,4-enynes via a 1,2-aryl rearrangement. The same reactivity has been observed in the presence of InBr3.