l-'4C]-Trans-9-octadecenoic acid was obtained in 60 per cent overall yield and [9, 10-3H]-trans-9-octadecenoic acid in 30 per cent yield by stereomutation of the double bonds in the corresponding cis-compounds with nitrous acid in toluene. purified by silver nitrate chromatography and contained no
Synthesis and Characterization of 9(10)-Bromo-9-octadecenoic Acids
✍ Scribed by Amat-Guerri, F. ;Rivas-Palmer, P.
- Publisher
- John Wiley and Sons
- Year
- 1975
- Weight
- 255 KB
- Volume
- 77
- Category
- Article
- ISSN
- 0931-5985
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✦ Synopsis
Abstract
9(10)‐Bromo‐cis‐9‐octadecenoic acid, m. p. 36.7° C, was prepared by dehydrobromination of threo‐9,10‐dibromo‐stearic acid with bases and by polar addition of hydrogen bromide to stearolic acid. The trans isomer, m. p. 6°–8° C, was obtained from the corresponding erythro‐dibromide. Both compounds were characterized by IR and NMR spectroscopies and a reaction scheme for their formation by dehydrobromination is suggested.
📜 SIMILAR VOLUMES
## Abstract The new α‐aminophosphonic acids are synthesized, reacting (9H‐fluoren‐9‐yl)urea with formaldehyde and phosphorus trichloride. (9H‐Fluoren‐9‐yl)urea was prepared from spiro(fluoren‐9,4′‐imidazolidine)‐2′,5′‐dione by alkaline hydrolysis with Ba(OH)~2~. The structure of the title compounds