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Acid catalyzed aldehyde‐indole reaction, synthesis of diindolylantipyrylmethane dyes
Author(s) -
Akgün Eyüp,
Tunali Mustafa
Publication year - 1988
Publication title -
archiv der pharmazie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.468
H-Index - 61
eISSN - 1521-4184
pISSN - 0365-6233
DOI - 10.1002/ardp.19883211219
Subject(s) - dichloromethane , aldehyde , chemistry , indole test , catalysis , tetrafluoroborate , organic chemistry , condensation reaction , condensation , elemental analysis , solvent , ionic liquid , physics , thermodynamics
The diindolylmethanes 3–4 are synthesized by condensation of the indoles 1 (2 equiv.) and antipyrine‐4‐carbaldehyde 2 in methanolic p‐toluenesulfonic acid. The methanes 3–4 are converted into their dyes 6–7 by triphenylcarbenium‐tetrafluoroborate in dichloromethane. The structures of 6–7 were confirmed by spectroscopic methods and elemental analysis.