Mono et difluoration electrochimiques de groupes benzyliques
作者:Eliane Laurent、Bernard Marquet、Robert Tardivel
DOI:10.1016/s0040-4020(01)89079-7
日期:——
a fluorinating reagent allowed to introduce a fluorine atom in α position of electron withdrawing group via carbocation + (ECBECN mechanism). Whatever the E group monofluorides are obtained in good yields from paramethoxy derivatives (R=p-OCH3). In this case, by raising the potential of working electrode after the monofluorination step, gem difluorides can be directly prepared from 1. When the substituent
以CH 3 CN为溶剂,以Et 3 N,3HF为氟化剂,对苄基化合物进行阳极氧化,通过碳正离子+(EC B EC N机理)在吸电子基团的α位置引入氟原子。从对甲氧基衍生物(R = p-OCH 3)以高收率获得任何E基团一氟化物。在这种情况下,通过在单氟化步骤之后提高工作电极的电势,可以直接从1制备二氟化宝石。当苯环的取代基与甲氧基不同时,氟化物2和乙酰胺的混合物 通常可以得到H 2 O 3,这两种化合物的比例与阳离子稳定性有关。
Kabore Leopold, Laurent Eliane, Marquet Bernard, J. Chem. Res. Symp., (1993) N 1, S 12-13
作者:Kabore Leopold, Laurent Eliane, Marquet Bernard
DOI:——
日期:——
Kabore, L.; Laurent, E.; Marquet, B., Journal of Chemical Research, Miniprint, 1993, # 1, p. 125 - 139