A synthetic route to chiral selenazolines from readily available N-acyloxazolidinones via a selenative rearrangement of a chiral cyclic skeleton is reported. The reaction proceeds in the presence of elemental selenium, a hydrochlorosilane, and an amine. Although the stability of the obtained selenazoline products is relatively low, a wide range of selenazolines was successfully prepared.

A highly diastereoselective α-allylation of selenolactams with allyl halides is reported. DFT analyses and experimental observations suggested that this reaction proceeds via a Se-allylation of the eneselenolates of the lactams followed by a seleno-Claisen rearrangement. The thus-obtained products could be efficiently transformed into polycyclic amines using a previously developed sequential addition of organometallic reagents and ring-closing metathesis.

Um 600°C reagieren Cyanurchlorid (I) und Hexachlorbenzol (II) über diskutierte Zwischenstufen zu den Metathese‐Verbindungen (III) und (IV).