Applications of conformational design: rational design of chiral ligands derived from a common chiral source for highly enantioselective preparations of (R)- and (S)-enantiomers of secondary alcohols
作者:Min-Can Wang、Yong-Hui Wang、Gao-Wei Li、Ping-Ping Sun、Jie-Xi Tian、Hui-Jie Lu
DOI:10.1016/j.tetasy.2011.04.013
日期:2011.4
application to the asymmetric addition of diethylzinc to aldehydes. This catalytic asymmetric process afforded the a most efficient access to the (R)- and (S)-enantiomers of a given secondary alcohol with similarly outstanding enantioselectivities and high yields. Our results also showed that the control of the desired conformer’s population by conformation design is a new and practical strategy for the
一对非对映异构体7和8可以根据构象设计的概念,从一个单一的手性来源仅用两个步骤轻松合成。这些手性配体的效率通过将其应用于不对称地将二乙基锌加成到醛中来评估。该催化不对称过程提供了最有效的(R)-和(S给定仲醇的)-对映异构体,具有相似的出色对映选择性和高收率。我们的结果还表明,通过构象设计控制所需构象异构体的数量是合理合理设计用于金属催化反应的高对映选择性手性配体的一种新的实用策略。在先前的研究以及手性配体7和8的晶体结构的基础上,提出了催化不对称加成反应的机理和可能的过渡态。