Abstract
The reaction of alantolactone, a sesquiterpene α,β-unsaturated lactone, with H-phosphonium or H-arsonium triflates proceeds as P–H or As–H addition at the terminal =CH2 moiety to afford novel triphenyl(sesquiterpenyl)phosponium or -arsonium triflates. Their diastereoisomerism at the formed C11 chiral center has been simulated by quantum chemical calculations.
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