Determination of enantiomeric purity of glycols RCHOHCH2OH
作者:Ernest L. Eliel、Kwang-Youn Ko
DOI:10.1016/s0040-4039(00)88164-2
日期:1983.1
The enantiomericpurity of primary-secondary glycols, RCHOHCH2OH, is conveniently determined by conversion to a pair of epimeric 1,3-dioxolanes through condensation with benzaldehyde, followed by NMRspectroscopy in presence of a chiral shift reagent with observation of the benzylic protons.
developed for the efficient synthesis of benzylidene acetal from aldehyde at room temperature. In this metal‐free method, Cl3CCN serves as a water scavenger as well as reaction medium and the acid catalyst is readily recovered and recycled. At room temperature, a wide variety of aryl and α,β‐unsaturated aldehydes react readily with functionalized diols and opticallyactive diols to furnish the corresponding