Guyanin, a novel tetranortriterpenoid. Structure elucidation by 2-D N.M.R. spectroscopy
✍ Scribed by Helen Jacobs; Frank Ramdayal; William F. Reynolds; Stewart McLean
- Book ID
- 104218366
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- French
- Weight
- 200 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
The structure of guyanin, a new type of tetranortriterpenoid isolated from Hortia regia, has been determined by nmr spectroscopy. Indirect shift correlation experiments were crucial for this determination. Hortia regia Vand. (Rutaceae), collected in Guyana, has afforded a new sub-
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The structure of the methylated derivative (1) of the tetrasaccharide-alditol-O-beta-L-rhamnopyranosyl-(1----3)-O-beta-D- xylopyranosyl-(1----4)-O-beta-L-rhamnopyranosyl-(1----2)-1,5-di-O-acetyl -L- arabinitol has been determined solely on the basis of n.m.r. data.
## Abstract Compounds 1–7 form a novel group of dithiocarbamates, first synthesized from the reaction of a series of primary amines with carbon disulfide and 3‐bromo ethyl pyruvate in the presence of anhydrous potassium phosphate. Structure elucidation of this group of compounds was accomplished us
## Abstract The charge separation between the dithiole ring and oxygen in 3‐(1′,2′‐dithiole‐3′‐ylidene)‐6‐methyl‐2,3‐dihydropyran‐2,4‐diones and 3‐(1′,2′‐dithiole‐3′‐ylidene)‐2,3‐dihydrobenzo[__b__] pyran‐2,4‐diones has been determined by ^13^C and ^19^F n.m.r. spectroscopy. By both methods it is f