SCHEDULED MAINTENANCE
A modified Wadsworth–Emmons reaction using a catalytic amount of 15-crown-5 has been employed in the synthesis of the naturally occurring furosesquiterpene pallescensin E. The structure of this compound has been confirmed by comparison of its spectral data with those of the synthesised isomer, 9,10-dihydro-7,8-dimethyl-4H-benzo[4,5]cyclohepta[1,2-b]furan.
R. Baker and R. J. Sims, J. Chem. Soc., Perkin Trans. 1, 1981, 3087 DOI: 10.1039/P19810003087
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