Abstract
AbstractA synthesis of the quettamine skeleton 29 is described comprising ring closure of the diastereomeric phenolic 1‐(α‐bromobenzyl)‐tetrahydroisoquinolines 27a and 27b. In both cases only one diastereomer was obtained. NOE‐experiments confirm Shamma's23) assignments concerning the stereochemistry. ‐ Various attemps to cleave the dithiane derivative 5 of an α‐amino ketone in order to obtain the ketone 6 failed on account of the non‐bonding electron pair at the N‐atom.
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