A new route to diesters of symmetrical octene , decene , and dodecenedioic acids was proposed. The ratio of the cis/trans isomers was 1 : 4. The synthesis involved oxidative splitting of five , six , and seven membered cycloalkanones with hydrogen peroxide into the corresponding ω alkenoic acids followed by esterification and metathesis over Re
Hex-5-ynoic acid, a mult.ipurpose synth0n, was synthesized in three steps starting from cyclohexanone by bromination--dehydrobr6mination of the intermediate hex-5-enoic acid.
carboxylic acidscarboxylic acids (acyclic compounds) P 0250
-072Synthesis of ω-and (ω-1)-Acetylenic Acids from Five-, Six-, or Seven-Membered Cycloalkanones.-A divergent and experimentally simple procedure for the synthesis of the title ω-and (ω-1)-acetylenic acids (IV) and (V), resp., from cycloalkanones (I) based on the selective dehydrobromination of the dibromides (III) is developed. -(STAROSTIN, E. K.; IGNATENKO, A. V.; LAPITSKAYA, M. A.; PIVNITSKY, K. K.; NIKISHIN, G. I.; Russ.
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