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Note | Regular issue | Vol 57, No. 7, 2002, pp.1273-1278
Published online, 1st January, 1970
DOI: 10.3987/COM-02-9477
Oxidative Coupling of Indoline-2-thione or Oxindole: Formation of Cyclic and Acyclic Indole Trimers

Tomasz Janosik and Jan Bergman*

*Unit for Organic Chemistry, Department of Biosciences at Novum, Karolinska Institutet, Novum Research Park, SE-141 57 Huddinge, Sweden


Oxidation of indoline-2-thione using p-toluenesulfonyl azide produced a modest yield of the structurally novel cyclic sulfur containing indole trimer (12). In contrast, the oxidation of oxindole with iodine instead produced an acyclic trimeric indole derivative.