Cp. Brock et al., AN OCTAHYDRO-3A,6-METHANOAZULEN-5-ONE RESULTING FROM AN INTRAMOLECULAR FRIEDEL-CRAFTS ACYLATION, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 106-108
The compound -methyl-4-methyl-thio-1H-3a,6-medianoazulen-5-one, C17H27
ClO2S, Was identified as the reaction product when the acid chloride f
ormed from a trans-fused perhydroindane derivative underwent a Friedel
-Crafts acylation of the internal olefin.