New method of preparation of C2F5Li and its reactions with cyclic imines and lactims: Synthesis of α-pentafluoroethyl proline
作者:Nikolay E. Shevchenko、Valentine G. Nenajdenko、Gerd-Volker Röschenthaler
DOI:10.1016/j.jfluchem.2008.01.013
日期:2008.5
Addition of pentafluoroethyllithium to cyclic imines leads to pentafluoroethyl substituted pyrrolidines, piperidines and azepanes while reaction of cyclic lactims gives rise to 2-pentafluoroethyl imines. Oxidative cleavage of 2-furyl-2-pentafluoroethyl pyrrolidine has been found to be an effective method for the preparation of a racemic α-pentafluoroethyl proline.
在环亚胺上添加五氟乙基锂会产生五氟乙基取代的吡咯烷,哌啶和氮杂环庚烷,而环内酰胺的反应会生成2-五氟乙基亚胺。已经发现2-呋喃基-2-五氟乙基吡咯烷的氧化裂解是制备外消旋α-五氟乙基脯氨酸的有效方法。