Dynamic resolution of lithiated ortho-trifluoromethyl styrene oxide and the effect of chiral diamines on the barrier to enantiomerisation
作者:Rosmara Mansueto、Filippo Maria Perna、Antonio Salomone、Saverio Florio、Vito Capriati
DOI:10.1039/c3cc40988k
日期:——
The first dynamic thermodynamic resolution of a racemic oxiranyllithium is described with selectivities of up to 82 : 18 from a selection of three types of chiral ligands (seven ligands in total). Both (-)-sparteine and its (+)-surrogate were surprisingly found to increase the enantiomerisation barrier.
通过选择三种类型的手性配体(总共七个配体),以高达82:18的选择性描述了外消旋环氧乙烷基锂的第一动态热力学拆分。令人惊奇地发现,(-)-天冬氨酸和它的(+)-替代物都增加了对映异构化屏障。