Catalytic Enantioselective Arylation of Aldehydes by Using Functionalized Grignard Reagents Generated from Aryl Bromides
作者:Toshiro Harada、Daisuke Itakura
DOI:10.1055/s-0031-1289854
日期:2011.12
of functionalized diarylmethanols starting from aryl bromides and aldehydes. In the presence of (R)-3-(3,5-diphenylphenyl)BINOL (2 mol%) and titanium tetraisopropoxide, functionalized aryl Grignard reagents (FGArMgCl; FG = 3-F3C, 4-F3C, 3-Br, 3-CN, 4-CN), prepared in situ by treatment of the bromides with i-PrMgCl˙LiCl, undergo addition to aldehydes to give the corresponding functionalized diarylmethanols
已经开发了一种有效的催化方法,用于从芳基溴化物和醛开始对映选择性合成官能化的二芳基甲醇。在(R)-3-(3,5-二苯基苯基)BINOL(2 mol%)和四异丙氧基钛的存在下,官能化的芳基格氏试剂(FGArMgCl; FG = 3-F 3 C,4-F 3 C,3-通过用i -PrMgCl 3 LiCl处理溴化物原位制备的Br,3-CN,4-CN)除醛以外,还以高对映选择性得到相应的官能化二芳基甲醇。 醛-芳基化-不对称催化-镁-钛