By X-ray analysis of (E)-2-methyl-3-(pyrrol-2-yl)prop-2-enal (9) the Z-configuration of the trisubstituted double bond in wallemia A (1) has been established. The E-isomer (10) has been synthesised, together with two lower vinylogues (8) and (16). The synthesis of other pyrrolylpolyenes is also reported.
Y. Badar, A. K. Chopra, H. W. Dias, M. B. Hursthouse, A. R. Khokhar, M. Ito, T. P. Toube and B. C. L. Weedon, J. Chem. Soc., Perkin Trans. 1, 1977, 1372 DOI: 10.1039/P19770001372
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