Ontology highlight
ABSTRACT:
SUBMITTER: Bruneau AM
PROVIDER: S-EPMC3985715 | biostudies-literature | 2014 Feb
REPOSITORIES: biostudies-literature
Journal of the American Chemical Society 20140205 7
Lithium ephedrates and norcarane-derived lithium amino alkoxides used to effect highly enantioselective 1,2-additions on large scales have been characterized in toluene and tetrahydrofuran. The method of continuous variations in conjunction with (6)Li NMR spectroscopy reveals that the lithium amino alkoxides are tetrameric. In each case, low-temperature (6)Li NMR spectra show stereoisomerically pure homoaggregates displaying resonances consistent with an S4-symmetric cubic core rather than the a ...[more]