Biomimetic synthesis of (±)-chrysomelidial, (±)-dehydroiridodial, and (±)-iridodial
Abstract
Treatment of 10-oxocitral (3), a key intermediate for iridoid biosynthesis, with 50% aqueous formic acid yielded (±)-chrysomelidial (5) and (±)-dehydroiridodial (6), while reduction of (3) or (5) and (6) in 70% aqueous formic acid with the coenzyme model (8) gave rise to (±)-iridodial (4).