ISSN:
1573-9171
Keywords:
2,3-diethoxycarbonyl-6-6-dimethyl-5,6-dihydro-4-pyridone
;
adduct with dimethyl acetylenediearboxylatc
;
atropoenantiomerism
;
X-ray structural analysis
;
interconversion
;
1H and13C NMR
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The title adduct (1) was synthesized, and its conformationally and configurationally rigid chiral structure in solution and in the crystal was established by NMR spectroscopy and by X-ray structural analysis. Atropoenantiomers of1 were observed by the1H NMR method in the presence of a chiral shift reagent. A barrier to their interconversïon was determined, ΔGx 〉 Z5 kcal mol−1 (200 °C).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01431811