Base-catalysed reactions of 3-benzylthioinden-1-ones
Abstract
Whereas 2-aryl-3-benzylthioinden-1-ones (Ia and b) are dealkylated by aqueous potassium hydroxide in dimethyl sulphoxide, the 2-unsubstituted analogue (Ic) undergoes self-condensation with formation of 3-benzylthio-8-phenylbenzofulvene; 2-alkyl-3-benzylthioinden-1-ones (Id and e) under similar conditions yield mixtures which include both the dealkylation product and the condensation product.