First total synthesis of (±)-melinonine-E
Abstract
The alkaloid melinonine-E has been synthesised for the first time, the key steps being the elaboration of the 2-azabicyclo[3.3.l]nonane nucleus by a radical cyclisation, the epimerisation of the cyano group to an axial position, and the closure of the C ring by Bischler–Napieralski cyclisation.