作者:Martin Lübke、Rolf Skupin、Günter Haufe
DOI:10.1016/s0022-1139(99)00230-4
日期:2000.3
position to the double bond destabilize carbenium centers in 2-position. Consequently, the part of anti-Markovnikov-oriented bromofluorides increases. Besides, with dropping reactivity of alkenes, the formation of dibromides becomes a competitive side reaction of bromofluorination. The extent of this process depends on the nature of the amine/HF reagent. This reaction is most important in case of the more
N与1-烯烃溴氟化的区域化学-溴代琥珀酰亚胺和胺/ HF试剂主要取决于双键附近的官能团的特性,而仅取决于氟化剂。虽然单取代的末端烯烃主要产生马尔可夫尼科夫取向的产物,但在双键的烯丙基或均烯丙基位置的吸电子基团使2-位的碳原子中心不稳定。因此,抗Markovnikov取向的溴氟化物的部分增加。此外,随着烯烃的反应性下降,二溴化物的形成成为溴氟化的竞争性副反应。该过程的程度取决于胺/ HF试剂的性质。对于亲核性更强的三甲胺二氢氟化物,该反应最为重要,