Shaun R Patel

Wabash College, کرافوردزویل، ایندیانا, Indiana, United States

Are you Shaun R Patel?

Claim your profile

Publications (1)3.8 Total impact

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In 2003, we reported the isolation, structure elucidation, and pharmacology of epiquinamide (1), a novel alkaloid isolated from an Ecuadoran poison frog, Epipedobates tricolor. Since then, several groups, including ours, have undertaken synthetic efforts to produce this compound, which appeared initially to be a novel, beta2-selective nicotinic acetylcholine receptor agonist. Based on prior chiral GC analysis of synthetic and natural samples, the absolute structure of this alkaloid was established as (1S,9aS)-1-acetamidoquinolizidine. We have synthesized the (1R*,9aS*)-isomer (epi-epiquinamide) using an iminium ion nitroaldol reaction as the key step. We have also synthesized ent-1 semisynthetically from (-)-lupinine. Synthetic epiquinamide is inactive at nicotinic receptors, in accord with recently published reports. We have determined that the activity initially reported is due to cross-contamination from co-occurring epibatidine in the isolated material.
    Full-text · Article · Mar 2009 · Journal of Natural Products

Publication Stats

23 Citations
3.80 Total Impact Points

Top Journals


  • 2009
    • Wabash College
      • Chemistry
      کرافوردزویل، ایندیانا, Indiana, United States