Synthetic, spectroscopic, and X-ray crystallographic studies of [1,2,7,8]tetrathiacyclododecino[4,3-b:5,6-b:10,9-b:11,12-b]tetraindoles

Tomasz Janosik, Jan Bergman, Ivan Romero, Birgitta Stensland, Claes Stålhandske, M. Manuel B. Marques, Maria M. M. Santos, Ana M. Lobo, Sundaresan Prabhakar, M. Filomena Duarte, M. Helena Florêncio

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1392-1396
Number of pages5
JournalEuropean Journal of Organic Chemistry
Issue number8
Publication statusPublished - 1 Jan 2002


  • Nitrogen heterocycles
  • NMR spectroscopy
  • Sulfur heterocycles
  • X-ray diffraction


Dive into the research topics of 'Synthetic, spectroscopic, and X-ray crystallographic studies of [1,2,7,8]tetrathiacyclododecino[4,3-b:5,6-b:10,9-b:11,12-b]tetraindoles'. Together they form a unique fingerprint.

Cite this