Chemistry of esters of acetylenic keto acids
β Scribed by I. I. Lapkin; Yu. S. Andreichikov
- Publisher
- Springer US
- Year
- 1967
- Tongue
- English
- Weight
- 175 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0021-9037
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π SIMILAR VOLUMES
bei kleinen und mittleren Gasgeschwindigkeiten wurde kein EinfluB der Lochteilung (t = 3 dh, t = 6 dh) festgestellt und -schlieBlich ergaben fiir alle Viskositaten weite Lochteilungen bei hohen Gasgeschwindigkeiten den besten Stofftransport. Die hier vorgestellten Untersuchungen wurden im Rahmen des
## Abstract The thermal decomposition of some 1βethoxyvinyl esters is described. The first step of the decomposition is rearrangement to a Ξ²βketo ester, the enolic form of which is subsequently acylated by the 1βethoxyvinyl ester.
Oxidation of alkynyl ethers and -amines with iodosylbenzene in presence of Rucatalysts affords a-keto esters and a-keto amides in 44-84% yield. These conversions can also be effected with RuO,. Oxidations based on iodosylbenzene are of current interest in connection with model studies for peroxidase
Positive-ion fast atom bombardment mass spectra of 13 keto acid and keto ester phosphoranes were examined. All compounds gave a protonated molecular ion and characteristic peaks at m/z 303,279,262 and 201. 4 5 6 7 a 9 10 11 12 13 m/z (relative abundance, "h) 477 (41). 403 (54). 377 (58). 347 (45). 3