The present invention relates to a bismuth-type promoter and its use as a Lewis acid catalyst for acylation reactions of aromatic compounds. The promoter corresponds to the formula MY
&mgr;−q
&xgr;
q
, where M represents a &mgr;-valent and at least trivalent element in the cationic form, preferably known to give Lewis acids, where Y is a monovalent anion or a monovalent anionic functional group, where &xgr;
−
represents an anion or an anionic functional group carrying a sulfonyl functional group carried by a perhalogenated atom, preferably a perfluorinated atom, more preferably a perfluoromethylene (—CF
2
—); and where q is an integer advantageously chosen within the closed range (comprising the limits) ranging from 1 to (&mgr;−1) (that is to say, 1 or 2 when &mgr; is 3). The present application also relates to processes for the preparation of the promoter.
本发明涉及一种
铋型
促进剂及其作为芳香化合物酰化反应的
路易斯酸催化剂的用途。
促进剂对应于公式MY &mgr;−q &xgr; q,其中M代表阳离子形式中的一个&mgr;-价和至少三价元素,最好是已知能提供
路易斯酸的元素,其中Y是一价阴离子或一价阴离子功能团,&xgr;−代表携带由
全氟化原子携带的磺酰基功能团的阴离子或阴离子功能团,最好是
全氟化原子,更好地是
全氟甲基(—
CF2—);q是一个整数,优选地选择在从1到(&mgr;-1)的封闭范围内(包括限制)的范围内(也就是说,当&mgr;为3时为1或2)。本申请还涉及制备
促进剂的方法。