Synthesis of 12-Methoxyabietic Acid Methylester, a Feeding Deterrent of the Larch Sawfly Pristiphora erichsonii (Hartig)

Article abstract of DOI:10.1007/BF00809694

The diasteromeric methylesters of 12-methoxyabietic acid, an antifeedant for the larch sawfly Pristiphora erichsonii (Hartig) have been synthesised from abietic acid methylester (2).The unknown configuration at C-12 of the natural product has been determined by comparing the spectral and analytical data of the synthesised compounds with data given in the literature for the natural product as being (S). - Keywords: 12-Methoxyabieticacidmethylester; η⁴-<<1R-(1a,4aβ,4ba,10aa)>-1,2,3,4,4a,4b,5,9,10,10a-Decahydro-1,4a-dimethyl-7-(-1-methylethyl)-1-phenanthrencarboxylic acid methylester>-tricarbonyliron, 1H-, 13C-, 2D-NMR