meso- and dl-Bivalvane (pentasecododecahedrane). Enantiomer recognition during reductive coupling of racemic and chiral 2,3-dihydro- and hexahydrotriquinacen-2-ones
作者:Leo A. Paquette、Isamu Itoh、William B. Farnham
DOI:10.1021/ja00858a013
日期:1975.12
transition states involved are of comparable energy. Studies with chiral and racemic 2,3-dihydrotriquinacen-2-one (13) gave analogous results. The various 1,2-glycols are identified by their I3C N M R (symmetry is thereby revealed), ‘H NMR (shielding of the endo protons at Cj and C3, by hydroxyl is witnessed), and ir spectra, in tandem with the method of synthesis. Conversion of the four diols to their thionocarbonates