First synthesis of the chiral mixed O/S ligands, 1,2-sulfinyl thiols: application as chiral proton sources in enantioselective protonations of enolates
作者:Gregorio Asensio、Pablo Gaviña、Ana Cuenca、M.Carmen Ramı́rez de Arellano、Luis R Domingo、Mercedes Medio-Simón
DOI:10.1016/s0957-4166(00)00330-x
日期:2000.9
the chiral mixed O/S ligands 1,2-sulfinyl thiols is described. These compounds have then been used as a chiral proton source in the enantioselective protonation of 2-methyl tetralone enolate and the results are compared with those obtained from the analogous alcohols. A theoretical model is proposed to explain the different behaviors exhibited in the protonation reaction for each of these proton sources
描述了制备手性混合的O / S配体1,2-亚磺酰基硫醇的合适方法。这些化合物随后被用作2-甲基四氢萘酮烯酸酯的对映选择性质子化中的手性质子来源,并将结果与从类似醇中获得的结果进行了比较。提出了一个理论模型来解释这些质子源在质子化反应中表现出的不同行为。通过X射线分析对新的手性硫醇进行了构型分配。