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Synthesen von Pyrazolo‐1,2,4‐triazin‐Derivaten des 1,6‐Methano[10]annulens
Author(s) -
Neidlein Richard,
Jäschke Uwe
Publication year - 1988
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19881210724
Subject(s) - chemistry , annulene , triazine , coupling reaction , medicinal chemistry , azo coupling , alcohol , stereochemistry , organic chemistry , catalysis
Syntheses of Pyrazolo‐1,2,4‐triazine Derivatives of 1,6‐Methano [10] annulene Coupling reactions of the diazonium betains 3, 4, 5 with 3‐ tert ‐butoxy‐1,6‐methano[10]annulene ( 2 ) under mild reaction conditions lead to elimination of tert ‐butyl alcohol with formation of the methano‐bridged triazine dye stuffs 6a – c . For comparison by coupling reactions of 3 – 5 with β‐naphthol followed by cyclisation reactions the triazine dye stuffs 8a – c are obtained. Their spectroscopic properties were compared with 6a – c .