Application of [Mo2(OAc)4] for determination of absolute configuration of pyranoid and furanoid vic-diols by circular dichroism
摘要:
The in situ complexes of [Mo-2(OAc)(4)] with vic-diols obtained from monosaccharides gave CD spectra suitable for determination of absolute configuration in this group. Positive (negative) torsional angle in the O-C-C-O moiety leads to a positive (negative) Cotton effect at around 300 nm. This rule was also extended to vic-diols containing an amino group in the same molecule. Protection of the amino group as a carbamate inhibits the formation of a chiral complex with the NH2 moiety and enables determination of absolute configuration of the diol fragment. Copyright (C) 1996 Elsevier Science Ltd