The 1H and 13C NMR spectra of cis-endo (a) and cis-exo (b) diastereoisomeric pairs of Ðve di †erently C-1-functionalized 2,4-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-ones were completely assigned. Several trends regarding the variation of chemical shifts and coupling constants of hydrogen and carbon a
C1—C2 Cleavage of C1-Functionalized 8-Oxabicyclo-[3.2.1]-oct-6-en-3-one. Stereoselective Preparation of 4-Substituted Butenolides.
✍ Scribed by Angel M. Montana; Francisca Garcia; Consuelo Batalla
- Publisher
- John Wiley and Sons
- Year
- 2005
- Weight
- 16 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0931-7597
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The total assignment of the 1 H and 13 C NMR spectra of 24 cis-endo and 15 cis-exo diastereoisomers of C-1-substituted 2,4-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one derivatives was deduced from the concerted application of DEPT, COSY, HETCOR, HMBC, HMQC and PS-NOESY experiments. The relative stereo
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