Gold- or Indium-Catalyzed Cross-Coupling of Bromoalkynes with Allylsilanes through a Concealed Rearrangement
摘要:
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.
Copper(I) and phase transfer catalysed allylic substitution by terminal alkynes
作者:Tuyêt Jeffery
DOI:10.1016/s0040-4039(00)99654-0
日期:1989.1
The Cu(I) catalysed allylic substitution of (un)substituted allyl halides by alk-1-ynes can proceed smoothly at or near room temperature under solid-liquid phasetransfer conditions.