Two conformationally different [1,2,7,8]tetrathiacyclododecino[4,3-b:5,6-b:10,9-b:11,12-b]tetraindoles 9a and 9b have been isolated in good yields, and the existence of a third conformer 9c in solution was demonstrated by mass spectrometry and 1H NMR spectroscopy. The interconversions of the tetraindoles 9a-c have also been studied. The conformation of 9b was confirmed by X-ray crystallography, while the conformations of 9a and 9b were assigned on the basis of spectroscopic data, and were also supported by molecular modelling studies, In addition, the elusive dithiin 3 was isolated and the structure was proven by X-ray crystallography.
|Number of pages||5|
|Journal||European Journal of Organic Chemistry|
|Publication status||Published - 1 Jan 2002|
- Nitrogen heterocycles
- NMR spectroscopy
- Sulfur heterocycles
- X-ray diffraction