Abstract
3,7-Diiodo-4,8-epoxy-euniolide (2) was synthesized from euniolide (1) by the addition reaction of iodine in the presence of triphenylphosphine in CH2Cl2. The absolute structure of 2 was unambiguously determined by a combination of 1H and 13C NMR, HREI mass spectroscopy, and x-ray single crystal analysis as (11E, 1S, 3S, 4R, 7S, 8R, 14S)-3,7-diiodo-4,8-epoxy-cembra-11,15-dien-16,14-olide. X-ray crystallographic data for 2: Orthorhombic P212121 (#19), a = 10.9688(7), b = 11.3909(8), c = 16.885(1) Å, ρcalcd = 1.795 g cm−3, and for Z = 4.
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Rodríguez, A.D., Acosta, A.L. & Huang, S.D. Absolute structure of (11E, 1S, 3S, 4R, 7S, 8R, 14S)-3,7-diiodo-4,8-epoxy-euniolide. Journal of Chemical Crystallography 28, 17–21 (1998). https://doi.org/10.1023/A:1021718416971
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DOI: https://doi.org/10.1023/A:1021718416971