1995
DOI: 10.1515/znb-1995-1213
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Heterocyclische Spirocyclohexadienone aus substituierten Phenolen / Heterocyclic Spirocyclohexadienones from Substituted Phenols

Abstract: Mannich Reaction, Phenol D ienone Tautomerism, Hofmann Martius RearrangementMannich bases were prepared from substituted phenols with aliphatic amines and formal dehyde. Am ine exchange with N-methyl-2-naphthylamine followed by a Hofmann Martius rearrangement gave rise to o,o'-am ino-hydroxy-diphenylmethane derivatives. Under cyclization conditions some of these compounds produced spirocyclohexadienones, which are the ipso analogs to the hypothetic intermediates postulated in the aminomethylation mechanism of … Show more

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Cited by 5 publications
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“…Precoated silicagel plates (Merck 60 F 254 ) were used for analytical and preparative TLC. Starting materials (ethylene glycol-, diethylene glycol monomethyl ethers, 2-phenoxyethanol and 4-tert-butylphenol) were purchased from Fluka, 2,4-bis (dimethyl-aminomethylene)-6-methylphenol, [16] 4-dimethylaminomethylene-2,6-dimethylphenol [17] 4-nitrophtalonitrile [18] and 4-tert-butyl(phenoxy)phtalonitrile [11b] were synthesized as described in the literature.…”
Section: Methodsmentioning
confidence: 99%
“…Precoated silicagel plates (Merck 60 F 254 ) were used for analytical and preparative TLC. Starting materials (ethylene glycol-, diethylene glycol monomethyl ethers, 2-phenoxyethanol and 4-tert-butylphenol) were purchased from Fluka, 2,4-bis (dimethyl-aminomethylene)-6-methylphenol, [16] 4-dimethylaminomethylene-2,6-dimethylphenol [17] 4-nitrophtalonitrile [18] and 4-tert-butyl(phenoxy)phtalonitrile [11b] were synthesized as described in the literature.…”
Section: Methodsmentioning
confidence: 99%