On the understanding of BF<sub>3</sub>·Et<sub>2</sub>O-promoted intra- and intermolecular amination and oxygenation of unfunctionalized olefins
作者:Chun-Hua Yang、Wen-Wen Fan、Gong-Qing Liu、Lili Duan、Lin Li、Yue-Ming Li
DOI:10.1039/c5ra10513g
日期:——
for both intra- and intermolecular amination and oxygenation of unfunctionalized olefins. In the presence of 3 equiv. of BF3·Et2O, intramolecular hydroamination of N-(pent-4-enyl)-p-toluenesulfonamides, N-(hex-5-enyl)-p-toluenesulfonamides, intermolecular hydroamination between sulfonamides and cyclohexene, norbornene or styrene, lactonization of pent-4-enoic acid or hex-5-enoic acid compounds and esterification
发现BF 3 ·Et 2 O对于未官能化的烯烃的分子内和分子间胺化和氧合都是有效的。在3当量的存在下。BF 3 ·Et 2 O的合成,N-(戊-4-烯基)-对甲苯磺酰胺,N-(六-5-烯基)-p的分子内加氢胺化-甲苯磺酰胺,磺酰胺与环己烯,降冰片烯或苯乙烯之间的分子间加氢胺化,戊-4-烯酸或六-5-烯酸化合物的内酯化以及环己烯与不同羧酸的酯化反应均很容易进行,从而导致相应的胺化或氧化产物高达99%的孤立产量。初步的NMR实验和DFT计算表明,分子内加氢氨化反应是通过磺酰亚胺酸中间体(NS-OH)进行的,形成布朗斯台德酸HF或HBF 4的可能性较小。