Asymmetric synthesis of the tropane alkaloid (+)-pseudococaine via ring-closing iodoamination.

Org Lett

Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.

Published: August 2012

Ring-closing iodoamination of tert-butyl 2-hydroxy-7-[N-methyl-N-(α-methyl-p-methoxybenzyl)amino]cyclohept-3-ene-1-carboxylates proceeds with concomitant loss of the N-α-methyl-p-methoxybenzyl group to give the corresponding 8-azabicyclo[3.2.1]octane scaffolds in >99:1 dr. Subsequent elaboration of one of these templates provided access to (+)-pseudococaine hydrochloride, in seven steps and 31% overall yield from commercially available starting materials.

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http://dx.doi.org/10.1021/ol3020607DOI Listing

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