104501-77-1Relevant articles and documents
Acid-catalyzed Isomerization of 3-Indolyl Sulfides to 2-Indolyl Sulfides: First Synthesis of 3-Unsubstituted 2-(Arylthio)indoles. Evidence for a Complex intermolecular Process
Hamel, Pierre,Girard, Yves,Atkinson, Joseph G.
, p. 2694 - 2699 (2007/10/02)
The acid-catalyzed isomerization of 3-indolyl sulfides 1 to the corresponding 2-indolyl sulfides 4 provides the first synthesis of 3-unsubstituted 2-(arylthio)indoles, a hitherto unattainable class of compounds.When catalyzed by trifluoracetic acid, the isomerisation proceeds mainly via an intermolecular mechanism involving initial disproportionation to a 2,3-indolyl bis-sulfide 5 and an unsubstituted counterpart 6 followed by further interaction if these species to yield the rearranged isomer 4.A mechanism is proposed involving a role for the acid tn the sulfenyl-transfer steps.This type of process also occurs, to a lesser extent, in the polyphosphoric acid catalyzed isomerization.
Thermal Rearrangements of N-Aryl-1-alkynesulphenamides into Indoline-2-thiones
Baudin, J.-B.,Bekhazi, M.,Julia, S. A.,Ruel, O.,Jong, R. L. P. de,Brandsma, L.
, p. 956 - 958 (2007/10/02)
Reaction of bromomagnesium benzenamides with 1-alkynyl thiocyanates affords the title sulphenamides.On heating in benzene, these sulphenamides undergo -sigmatropic rearrangements followed by cyclisation of the intermediate thioketenes yielding indoli