Diastereodivergent additions of aluminum and magnesium reagents to [(S)S]-3,6-dimethoxy-2-(p-tolylsulfinyl)-benzaldehyde
作者:Antonio Almorı́n、M.Carmen Carreño、Álvaro Somoza、Antonio Urbano
DOI:10.1016/s0040-4039(03)01369-8
日期:2003.7
Enantiomerically pure [(S)S]-3,6-dimethoxy-2-(p-tolylsulfinyl)-benzaldehyde, prepared in two steps from commercially available 2,5-dimethoxybenzyl alcohol, reacted with organomagnesium and organoaluminum derivatives in a highly diastereodivergent way giving rise respectively to the (S) or (R) alkyl aryl or diaryl carbinols in excellent chemical and optical yields. Enantiopure (S) and (R)-2,5-dimethoxyphenyl
对映体纯的[(S)S ] -3,6-二甲氧基-2-(对甲苯亚磺酰基)-苯甲醛分两步从商购的2,5-二甲氧基苄醇制备,并以高度非对映异构的方式与有机镁和有机铝衍生物反应分别以优异的化学和光学收率得到(S)或(R)烷基芳基或二芳基甲醇。对映纯(S)和(R)-2,5-二甲氧基苯基甲基甲醇是通过两步序列获得的,该步骤包括亲核加成MeMgBr或AlMe 3并用正丁基锂脱硫。