Zinc-mediated Coupling Reaction of 2-Bromo-2,3,3,3-tetrafluoropropanoate with Various Chiral Imines. Simple and Effective Access to Optically Active α-Fluoro-α-(trifluoromethyl)-β-amino Esters
作者:Takashi Sekiguchi、Kei Sato、Takashi Ishihara、Tsutomu Konno、Hiroki Yamanaka
DOI:10.1246/cl.2004.666
日期:2004.6
The reactions of benzyl 2-bromo-2,3,3,3-tetrafluoropropanoate with various types of chiral imines in the presence of zinc in THF at room temperature were revealed to afford the threo- and erythro-isomers of α-fluoro-α-(trifluoromethyl)-β-amino esters with high diasteremeric excesses in fair to good chemical yields.
在
锌存在下,
2-溴-2,3,3,3-四氟丙酸苄酯与各种手性
亚胺在室温下于
四氢呋喃中的反应显示,可以得到α-
氟-α-(三
氟甲基)-β-
氨基酯的三
氟异构体和赤
氟异构体,非对映过量较高,
化学收率尚可。