作者:Tülay Yıldız、Nurgül Çanta、Ayşe Yusufoğlu
DOI:10.1016/j.tetasy.2014.01.003
日期:2014.2
Fourteen chiral α- and β-keto alcohols 2a–2r were synthesized by the asymmetric reduction of their corresponding diketones 1a–1r via baker’s yeast. In addition, ten corresponding racemic α-keto alcohols were synthesized by the benzoin condensation of their corresponding aldehydes, which were used for the determination of the ee values through their chiral resolution on chiral HPLC. Amongst the 15 diketones
通过面包酵母通过不对称还原相应的二酮1a - 1r,合成了14种手性α-和β-酮醇2a - 2r。此外,通过苯甲酸的相应醛的苯偶姻缩合反应,合成了十种相应的外消旋α-酮醇,它们通过手性HPLC上的手性拆分用于测定ee值。在这15种二酮中,1j和手性α-酮醇2i,2j和手性β-酮醇2r是新型化合物。六种酮醇2b,2c,2d,2f,面包酵母首次合成了2h和2p。文献中有一些研究,其中在与本文报道的条件不同的各种条件下,将面包酵母应用于二酮1a,1g,1e,1k和1n。这些研究的产量和ee值不如我们的结果高。合成的所有酮醇均通过IR,NMR(1 H和13 C)和MS表征。还讨论了二酮的结构与产率,非对映选择性和对映体过量之间的关系。