Mechanistic examination of Au<sup>III</sup>-mediated 1,5-enyne cycloisomerization by AuBr<sub>2</sub>(<i>N</i>-imidate)(NHC)/AgX precatalysts – is the active catalyst Au<sup>III</sup> or Au<sup>I</sup>?
作者:Jonathan P. Reeds、Mark P. Healy、Ian J. S. Fairlamb
DOI:10.1039/c4cy00617h
日期:——
The role of AuI and AuIII species in 1,5-enyne cycloisomerization reactions has been examined in this paper.
本文研究了AuI和AuIII物种在1,5-炔烯环异构化反应中的作用。
Calcium-Catalyzed Direct Coupling of Alcohols with Organosilanes
作者:Vera J. Meyer、Meike Niggemann
DOI:10.1002/ejoc.201100231
日期:2011.7
A calcium-catalyzeddirect substitution of π-activatedalcohols with different organosilanes under very mild reaction conditions is presented. The high reactivity of the calcium catalyst allows efficient conversion of secondary and tertiary allylic, secondary benzylic, and tertiary propargylic alcohols with allyltrimethylsilane at room temperature. Furthermore, the first direct substitution of an alcohol