Substitution of fluorine in M[C<sub>6</sub>F<sub>5</sub>BF<sub>3</sub>] with organolithium compounds: distinctions between O- and N-nucleophiles
作者:Anton Yu Shabalin、Nicolay Yu Adonin、Vadim V Bardin
DOI:10.3762/bjoc.13.69
日期:——
Borates M[C6F5BF3] (M = K, Li, Bu4N) react with organolithium compounds, RLi (R = Me, Bu, Ph), in 1,2-dimethoxyethane or diglyme to give M[4-RC6F4BF3] and M[2-RC6F4BF3]. When R is Me or Bu, the nucleophilic substitution of the fluorine atom at the para position to boron is the predominant route. When R = Ph, the ratio M[4-RC6F4BF3]/M[2-RC6F4BF3] is ca. 1:1. Substitution of the fluorine atom at the
硼酸盐M [C6F5BF3](M = K,Li,Bu4N)与有机锂化合物RLi(R = Me,Bu,Ph)在1,2-二甲氧基乙烷或二甘醇二甲醚中反应,得到M [4-RC6F4BF3]和M [2 -RC6F4BF3]。当R为Me或Bu时,主要的途径是在硼对位的氟原子的亲核取代。当R = Ph时,比率M [4-RC6F4BF3] / M [2-RC6F4BF3]为约。1:1 氟邻位取代硼仅由RLi通过锂原子与BF3基团的氟原子配位引起。这与先前报道的在K [C6F5BF3]中被不产生K [2-NuC6F4BF3]的O-和N-亲核试剂取代不同。