The invention relates to a nucleophilic reagent which is useful for grafting a substituted difluoromethyl group onto a compound containing at least one electrophilic function, or for the synthesis of oxysulphide-containing and fluorine-containing organic derivatives, wherein said reagent comprises:
a) a fluorocarboxylic acid of formula Ew—CF
2
—COOH where Ew represents an electron-withdrawing atom or group, at least partially salified with an organic or inorganic cation, and
b) a polar aprotic solvent;
and in that the content of releasable protons carried by its various components, including their impurities, is at most equal to half the initial molar concentration of the said fluorocarboxylic acid.
A synthetic process uses this reagent by heating in order to graft a substituted difluoromethyl group onto various compounds.
该发明涉及一种亲核试剂,用于将取代二
氟甲基基团嫁接到含有至少一个亲电性功能的化合物上,或用于合成含氧
硫和含
氟有机衍
生物,其中所述试剂包括:a) 公式Ew—
CF2—COOH的
氟代
羧酸,其中Ew代表一个电子吸引原子或基团,至少部分与有机或无机阳离子盐化,以及b) 极性无
水溶剂;并且其中,由其各种组分携带的可释放质子的含量,包括其杂质,在最多等于所述
氟代
羧酸的初始摩尔浓度的一半。一种合成过程利用该试剂通过加热将取代的二
氟甲基基团嫁接到各种化合物上。