ISSN:
0899-0042
Keywords:
1,2-diols
;
chiral Mo complexes
;
transition metal complexes
;
difference CD
;
sum CD
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The in situ complexes of dimolybdenum tetraacetate [Mo2(OAc)4] with vicinal diols give CD spectra suitable for determination of their absolute configuration. Positive (negative) torsional angle in the O-C-C-O moiety leads to a positive (negative) Cotton effect at around 300 nm. The extension of this rule to compounds containing a second vic-diol moiety in the same molecule is studied on brassinosteroid vic-diols 1-14. It is demonstrated that the in situ method allows fast and easy configurational assignment of both glycol moieties present in brassinosteroids on the basis of the sum and difference CDs of respective pairs of (22S,23S)- and (22R,23R)-isomers. Chirality 9:578-582, 1997. © 1997 Wiley-Liss, Inc.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
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