Meisenheimer rearrangements of N-allyl 2-azabornane derivatives

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Jonathan E. H. Buston, Iain Coldham and Keith R. Mulholland


Abstract

A study of the asymmetric [2,3]-Meisenheimer rearrangement of tertiary amine-N-oxides was carried out, in order to provide a method for the preparation of chiral allylic alcohols. The use of 2-azabornane as a chiral auxiliary gives rise to chiral tertiary amine-N-oxides, which undergo the [2,3]-Meisenheimer rearrangement with high levels of stereoselectivity. Reductive N,O-bond cleavage, mediated by ultrasound, of the O-allyl-hydroxylamine allows access to the chiral allylic alcohol.


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