Synthetic transformations of sesquiterpene lactones 6. Alantolactone and isoalantolactone derivatives in the Heck reaction |
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| Authors: | E E Shul’ts A V Belovodskii M M Shakirov G A Tolstikov |
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| Institution: | 1274. N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 prosp. Akad. Lavrent’eva, 630090, Novosibirsk, Russian Federation
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| Abstract: | The Heck reaction of the eudesman-type methylidenelactones (alantolactone, alloalantolactone, and 4,15-epoxyisoalantolactone) with haloarenes afforded the corresponding (E)-13-aryleudesma-4(15),11(13)-dien-8β,12-olides and 11-arylmethyl-13-noreudesma-4(15),7(11)-dien-8α,12-olides. The yields and the ratios of the arylation products depended on the reaction conditions and the structure of lactone. Certain side processes were found to take place. |
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