Facile synthesis of α-monofluoromethyl alcohols: Nucleophilic monofluoromethylation of aldehydes using TMSCF(SO2Ph)2
作者:G.K. Surya Prakash、Nan Shao、Zhe Zhang、Chuanfa Ni、Fang Wang、Ralf Haiges、George A. Olah
DOI:10.1016/j.jfluchem.2011.10.010
日期:2012.1
α-Fluoromethyl phenyl sulfone derivatives have been extensively employed in various reactions as versatile fluoromethylating reagents. While nucleophilic monofluoromethylations of aldehydes have been achieved using fluoromethyl phenyl sulfone or fluorobis(sulfonyl)methanes, a facile protocol under mild reaction conditions remains an ardently sought goal. We now report a feasible synthetic approach
α-氟甲基苯基砜衍生物作为通用的氟甲基化试剂已广泛用于各种反应中。尽管已经使用氟甲基苯基砜或氟双(磺酰基)甲烷实现了醛类的亲核单氟甲基化,但在温和的反应条件下实现简便的操作方案仍然是人们一直追求的目标。现在,我们报告使用α-三甲基甲硅烷基-α-氟双(苯磺酰基)甲烷[TMSCF(SO 2 Ph)2,TFBSM]作为新型单氟甲基化试剂。由催化量的氟化物引发,可以轻松地将试剂添加到各种醛中,从而以高收率提供所需的产物。计算和动力学研究表明,与其他氟甲基硅烷相比,TFBSM中Si-C键具有出色的不稳定性。