Beilstein J. Org. Chem.2019,15, 2678–2683, doi:10.3762/bjoc.15.261
ketones were used to synthesize new N,S-heterotetracenes, namely 9H-thieno[2',3':4,5]thieno[3,2-b]indoles by their treatment with arylhydrazines in accordance with the Fischer indolization reaction.
Keywords: Fiesselmann thiophene synthesis; Fischer indole synthesis; N,S-heteroacene; thieno[3,2-b
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Graphical Abstract
Figure 1:
An example of an earlier developed S,N-heterohexacene [13] and general structure of compounds synthesiz...