In this paper we report a facile and stereoselective approach to the pyrroloisoquinoline ring system through the application of N-acyliminium chemistry from readily available non-racemic chiral templates. The stereochemical outcome of the cyclisation reactions has been determined by NOE and X-ray crystallography. We also demonstrate the synthetic potential of our new approach through removal of the pendant hydroxymethyl auxiliary from a product of cyclisation.
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Allin et al. (2001) studied this question.
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