Lewis acid activation of chiral 2-trifluoromethyl-1,3-oxazolidines. Application to the stereoselective synthesis of trifluoromethylated amines, α- and β-amino acids
作者:Nicolas Lebouvier、Christophe Laroche、Florent Huguenot、Thierry Brigaud
DOI:10.1016/s0040-4039(02)00330-1
日期:2002.4
The reaction of chiral 2-trifluoromethyl-1,3-oxazolidines with various silylated nucleophiles under Lewis acid activation provides a stereoselective route to functionalized α-trifluoromethylamines. This methodology was successfully applied to the diastereoselective synthesis of trifluoromethylated homoallylic and propargylic amines, trifluoromethylated α-amino nitrile, β-aminoketone and β-aminoester
在
路易斯酸活化下,手性2-三
氟甲基-
1,3-恶唑烷与各种甲
硅烷基化的亲核试剂的反应为官能化的α-三
氟甲基胺提供了立体选择途径。该方法成功地应用于三
氟甲基化的均烯丙基和
炔丙基胺,三
氟甲基化的α-
氨基腈,β-
氨基酮和β-
氨基酯的非对映选择性合成。将α-
氨基腈和β-
氨基酯一步一步转化为(+)-3,3,3-三
氟丙
氨酸和(+)-4,4,4,4-三
氟-3-
氨基
丁酸。