Tetrahedron Letters p. 3903 - 3906 (1993)
Update date:2022-08-29
Topics:
Dal Piaz
Giovannoni
Ciciani
The homolytic substitution of protonated 3-chloro-6-methylpyridazine 1a, followed by hydrolysis with AcOH affords 4- or 4,5-functionalized pyridazinones 3a-c. Less reactivity is found for 3-chloro-6-phenylpyridazine 1b. Hypotheses about these different behaviour patterns are proposed and discussed.
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