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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For Part 5, see Ref. 1.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1959–1968, October, 2012.
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Shul’ts, E.E., Belovodskii, A.V., Shakirov, M.M. et al. Synthetic transformations of sesquiterpene lactones 6. Alantolactone and isoalantolactone derivatives in the Heck reaction. Russ Chem Bull 61, 1975–1985 (2012). https://doi.org/10.1007/s11172-012-0274-4
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DOI: https://doi.org/10.1007/s11172-012-0274-4