Synthetic, Spectroscopic, and X‐ray Crystallographic Studies of [1,2,7,8]Tetrathiacyclododecino[4,3‐<i>b</i>:5,6‐<i>b</i>′:10,9‐<i>b</i>′′:11,12‐<i>b</i>′′′]tetraindoles
作者: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
DOI:10.1002/1099-0690(200204)2002:8<1392::aid-ejoc1392>3.0.co;2-#
日期:2002.4
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 H-1 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.((C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002).