作者:Franklin A. Davis、Rajarathnam E. Reddy、Joanna M. Szewczyk、G. Venkat Reddy、Padma S. Portonovo、Huiming Zhang、Dean Fanelli、R. Thimma Reddy,、Ping Zhou、Patrick J. Carroll
DOI:10.1021/jo970077e
日期:1997.4.1
Enantiomerically pure sulfinimines (thiooxime S-oxides 10), important building blocks in the asymmetric synthesis of amine derivatives, are prepared in good to excellent yields in one step from aromatic, heteroaromatic, and aliphatic aldehydes. This protocol involves treating commercially available (R)- or (S)-menthyl p-toluenesufinate (Andersen reagent 4) with LiHMDS, followed by the aldehyde, affording
对映体纯的亚砜亚胺(硫肟肟S-氧化物10),是胺衍生物不对称合成的重要组成部分,一步一步从芳族,杂芳族和脂族醛制备,收率良好至优异。该方案涉及先用LiHMDS处理醛对苯甲酸酯的(R)-或(S)-薄荷基对甲苯磺酸酯(Andersen试剂4),然后用醛处理,仅得到(E)-10。亚磺胺10是通过甲硅烷基亚磺酰胺阴离子13与醛的Peterson型烯化反应形成的。通过四氧化三锂(12a)与双(三甲基甲硅烷基)亚磺酰胺11的反应生成阴离子13,双(三甲基甲硅烷基)亚磺酰胺11在4与LiHMDS的反应中形成。形成的另一产物是O-(三甲基甲硅烷基)薄荷醇(12c),将其以> 80%的产率分离出来以进行再循环。