Divergent reactivity of an indole glucosinolate yields Lossen or Neber rearrangement products: the phytoalexin rapalexin A or a unique β-<scp>d</scp>-glucopyranose fused heterocycle
作者:M. S. C. Pedras、Q. H. To、G. Schatte
DOI:10.1039/c5cc09822j
日期:——
Transformation of 1-t-Boc-4-methoxyindole-3-glucosinolate in acidic conditions yielded the potent phytoalexin rapalexin A, providing its first biomimetic synthesisvia Lossen type rearrangement, while the novel 1-thioimidocarbonyl-[small beta]-D-glucopyranose heterocyclic system was obtained in...
The first isocyanide of plant origin expands functional group diversity in cruciferous phytoalexins: synthesis, structure and bioactivity of isocyalexin A
作者:M. Soledade C. Pedras、Estifanos E. Yaya
DOI:10.1039/c2ob25492a
日期:——
Although isocyanides are not rare amongst terrestrial microbes and marine organisms, despite tens of thousands of natural products isolated from plants, isocyanides are still missing. Isocyalexin A is the firstisocyanide of plant origin. Isocyalexin A was isolated from UV-irradiated rutabaga roots and shown to be a new cruciferous phytoalexin. Its chemical structure was proven by analysis of NMR spectroscopic