Diastereomeric cyclic tris-allenes?

Chemical Communications Pub Date: 2013-02-07 DOI: 10.1039/C3CC40354H

Abstract

Both diastereomers of the tris-allene, cyclododeca-1,2,5,6,9,10-hexaene have been obtained using a triple cyclopropylidene–allene rearrangement. On the NMR timescale, one has D3 symmetry, and is the smallest hydrocarbon synthesised to have this symmetry, and the second has C2 symmetry.

Graphical abstract: Diastereomeric cyclic tris-allenes
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