Pyridazines. IV. Intramolecular Cycloaddition of 3-Chloro-6-(2-allyloxyphenoxy) pyridazines

TERUOMI JOJIMA; HIDEO TAKESHIBA; TAKAO KINOTO

doi:10.1248/cpb.28.198

Chemical and Pharmaceutical Bulletin

Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363

Pyridazines. IV. Intramolecular Cycloaddition of 3-Chloro-6-(2-allyloxyphenoxy) pyridazines

TERUOMI JOJIMA, HIDEO TAKESHIBA, TAKAO KINOTO

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Keywords: [3, 4]-sigmatropic rearrangement

JOURNAL FREE ACCESS

1980 Volume 28 Issue 1 Pages 198-201

DOI https://doi.org/10.1248/cpb.28.198

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Abstract

Intramolecular cycloaddition of 3-chloro-6-(2-allyloxyphenoxy) pyridazines yielded various hydroxyxanthenes, which were also prepared by similar cycloaddition of 3-substituted-6-(2-allylphenoxy) pyridazines containing methoxy groups on their benzene rings, followed by demethylation of the resulting methoxyxanthenes. The mechanism of the reaction is discussed.

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