Diastereoselective Michael reactions of (1R)-(+)-camphor methyl ketone enolates with nitro olefins
作者:Claudio Palomo、Jesús M Aizpurua、M Oiarbide、Jesús M Garcı́a、Alberto González、I Odriozola、Anthony Linden
DOI:10.1016/s0040-4039(01)00885-1
日期:2001.7
The reaction of the sodium enolate of the methyl ketone 2 with a range of nitro olefins proceeds readily to give the corresponding Michael adducts in good yields and diastereoselectivities. Subsequent oxidative cleavage of the acyloin moiety provides γ-nitroalkanoic acids along with (1R)-(+)-camphor, the chiral auxiliary of the process, which can be recovered and reused.
甲基酮2的烯醇钠与一定范围的硝基烯烃的反应容易进行,从而以良好的收率和非对映选择性得到相应的迈克尔加合物。随后,酰基环蛋白部分的氧化裂解提供了γ-硝基链烷酸以及(1 R)-(+)-樟脑,该方法的手性助剂,可以回收并再利用。