Metal triflates–methanesulfonic acid as new catalytic systems: application to the Fries rearrangement
作者:Omar Mouhtady、Hafida Gaspard-Iloughmane、Nicolas Roques、Christophe Le Roux
DOI:10.1016/s0040-4039(03)01599-5
日期:2003.8
triflates (Mg, Ca, Sc, Cu, Zn, Y, Ln, Bi) and methanesulfonic acid, leading to active catalytic systems for the Fries rearrangement. In particular, the systems based on yttrium and copper(II) triflate proved to be very active and much cheaper than scandium triflate. The efficiency of these systems might result from the catalytic Lewis acid activation of Brønsted acids.
在金属三氟甲磺酸酯(Mg,Ca,Sc,Cu,Zn,Y,Ln,Bi)和甲磺酸之间发现了令人惊讶的协同效应,从而导致了Fries重排的活性催化系统。特别地,基于钇和三氟甲磺酸铜(II)的系统被证明是非常活跃的,并且比三氟甲磺酸cheap便宜得多。这些系统的效率可能来自布朗斯台德酸的催化路易斯酸活化。