A short and efficient synthesis of (±)-β-cuparenone

Total synthesis of Sceletium alkaloids (±)-joubertinamine, (±)-epijoubertinamine, (±)-tortuosamine and formal synthesis of (±)-mesembrine, (±)-N-formyltortuosamine

An efficient collective formal/total synthesis of Sceletium alkaloids achieved by employing the Wittig olefination–Claisen rearrangement protocol.

Total synthesis of (±)-coerulescine and (±)-horsfiline

Wittig olefination-Claisen rearrangement protocol was applied to obtain 3-allyl oxindole. This oxindole was then converted to (±)-coerulescine and (±)-horsfiline.