Pyridazines. III. Intramolecular Cycloaddition of 3-Substituted-6-(2-allylphenoxy) pyridazines

Pyridazines. III. Intramolecular Cycloaddition of 3-Substituted-6-(2-allylphenoxy) pyridazines

Intramolecular cycloaddition of 3-phenyl-6-(2-allylphenoxy) pyridazines afforded 2-phenyl-1, 9a-dihydroxanthenes, while 3-methyl-6-(2-allylphenoxy)-, and 3-(2-allylphenoxy) pyridazines gave mixtures of dihydroxanthenes. Depending upon condition, 3-chloro-6-(2-allyl-4-alkoxycarbonylphenoxy) pyridazin...

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Veröffentlicht in:Chemical & pharmaceutical bulletin 1976/07/25, Vol.24(7), pp.1588-1595
Hauptverfasser: JOJIMA, TERUOMI, TAKESHIBA, HIDEO, KINOTO, TAKAO
Format: Artikel
Sprache:eng
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Zusammenfassung:Intramolecular cycloaddition of 3-phenyl-6-(2-allylphenoxy) pyridazines afforded 2-phenyl-1, 9a-dihydroxanthenes, while 3-methyl-6-(2-allylphenoxy)-, and 3-(2-allylphenoxy) pyridazines gave mixtures of dihydroxanthenes. Depending upon condition, 3-chloro-6-(2-allyl-4-alkoxycarbonylphenoxy) pyridazines gave rise to the corresponding 1, 9a-, and 1, 4-dihydroxanthenes along with 2-alkoxycarbonylxanthenes.
ISSN:0009-2363
1347-5223
DOI:10.1248/cpb.24.1588