Synthesis of gibberellins A8 and A56 from gibberellin A3
作者:N. A. Pankrushina、A. G. Druganov、I. Yu. Bagryanskaya、Yu. V. Gatilov、M. M. Shakirov、V. A. Raldugin
DOI:10.1007/bf00629875
日期:1994.9
modified. The mixture of 1β-iodides of GA8 and GA56 was separated by chromatography on SiO2 in the form of methyl or p-bromophenacyl esters which were then deiodinated and the methyl or p-bromphenacyl ester of GA8 was isolated. Free GA8 was obtained by the dephenylation of the latter ester. By two-dimensional NMR spectroscopy we succeeded in assigning all the signals in the13Cand1H NMR spectra of the methyl