A synthesis, including asymmetric synthesis, of α-quaternary α-amino aldehydes from ketones and chloromethyl p-tolyl sulfoxide via sulfinylaziridines
作者:Tsuyoshi Satoh、Juri Endo、Hiroyuki Ota、Toshio Chyouma
DOI:10.1016/j.tet.2007.03.067
日期:2007.5
p-tolyl sulfoxides, prepared from ketones and chloromethyl p-tolyl sulfoxide, with N-lithio arylamines resulted in the formation of sulfinylaziridines in good to high yields. The sulfinylaziridines were treated with N-lithio aniline or N-lithio p-chloroaniline to afford α-quaternary α-amino aldehydes in good yields. From α-quaternary α-amino aldehydes, α-quaternary α-amino acid esters and β-quaternary β-amino
1-氯乙烯基治疗p -甲苯基砜,由酮和氯制备p -甲苯基砜,用Ñ -lithio芳基胺导致良好的形成sulfinylaziridines的产量高。用N-硫代苯胺或N-硫代对氯苯胺处理亚磺酰基氮丙啶,以高收率得到α-季α-氨基醛。由α-季α-氨基醛获得α-季α-氨基酸酯和β-季β-氨基醇。当旋光性氯甲基p在该步骤中使用了甲苯基亚砜,从而实现了一种光学活性α-季α-氨基醛的合成方法。描述了用于形成亚磺酰基氮丙啶的反应机理,包括不对称诱导。