New bifunctional chiral ammonium salts were investigated in an asymmetric cascade synthesis of a key building block for a variety of biologically relevant isoindolinones. With this chiral compound in hand, the development of further transformations allowed for the synthesis of diverse derivatives of high pharmaceutical value, such as the Belliotti (S)-PD172938 and arylated analogues with hypnotic sedative activity, obtained in good overall total yield (50%) and high enantiomeric purity (95% ee). The synthetic routes developed herein are particularly convenient in comparison with the current methods available in literature and are particularly promising for large scale applications.
新的双功能手性铵盐在对各种生物相关的异吲哚酮的关键构建块进行不对称级联合成中进行了研究。有了这种手性化合物,进一步转化的开发使得合成具有高药用价值的多种衍生物成为可能,例如Belliotti(S)-PD172938和芳基类似物,具有催眠镇静活性,总产率较高(50%)且对映选择性较高(95% ee)。本文开发的合成路线与目前文献中可用的方法相比特别方便,并且特别适用于大规模应用。