Doc. L976 1161 Improved Synthesis of Indenothiophenes. Partili (1). Synthesis of Indenothiophene-2-carboxylic Acids. Harald Grànhaus (a) (2), Matthias Pailer (b), Sigrid Stof (b) (a) Österreichische Ichthyol-Ges., Seefeld, Austria, (b) Pharmazeutisch-chemisches Institut, Vienna, Austria Received June 16, 1976 The synthesis of indenothiophenes and substituted compounds is described starting from iridane via indanaldehyde. Л separation of the ...