CH23197Revisiting Staudinger and Ruzicka’s altered pyrethrolone: the cyclopentadienone dimers derived from pyrethrin I, cinerin I and jasmolin I
On treatment with base, the natural pyrethrins pyrethrin I, cinerin I and jasmolin I undergo elimination to transient cyclopentadienones that dimerise to afford regioisomeric endo cycloadducts. (Image credit: J. H. Ryan.)
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