The partial synthesis of an isomer of gibberellic acid methyl ester, with a lactone between C-6 and C-10 and an esterified acid group at C-19, is described. The overall yield from gibberellic acid was 46%. The preparation of 6-epi-GA1 has also been carried out. Its structure was confirmed by an X-ray analysis of its 1 β-iodo derivative.
B. M. Fraga, C. D. Gómez, M. G. Hernández, E. de Paz, F. G. Tellado and A. A. Perales, J. Chem. Soc., Perkin Trans. 1, 1990, 1535 DOI: 10.1039/P19900001535
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