Ring D Expansion and Aromatisation in the Biosynthesis of Nic-1, an Antifeedant Steroid from Nicandra physaloides
Isotope administration experiments with Nicandra physaloides plants using 2H3>- and 14C3>-mevalonic acid, analysed by 2H NMR and by degradation, respectively, show that the aromatic ring-D of Nic-1 (2) is formed by ring-D expansion in a steroid precursor with oxidative inclusion of the C/D angular methyl.
Gill, Harjit K.,Smith, Roland W.,Whiting, Donald A.
p. 2989 - 2993
(2007/10/02)
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