Enantioselective methylation of the lithium enolate of 1-tetralone mediated by chiral C2-symmetric DMEU derivatives
作者:Katsuyuki Ishii、Shin Aoki、Kenji Koga
DOI:10.1016/s0040-4039(96)02372-6
日期:1997.1
Chiral C2-symmetric DMEU derivatives were designed and synthesized as chiral ligands for lithium. The reaction of the lithium enolate (2) of 1-tetralone (1) with methyl iodide in toluene in the presence of a DMEU derivative (11) and hexamethyl-disilazane gave (S)-2-methyl-1-tetralone ((S)-3) in up to 92% ee.
设计并合成了手性C 2对称的DMEU衍生物,作为锂的手性配体。在DMEU衍生物(11)和六甲基-二硅氮烷的存在下,1-四氢萘酮(1)的烯醇锂(2)与甲基碘在甲苯中的反应得到(S)-2-甲基-1-四氢萘酮((S )-3)达到92%ee。