Abstract
The reaction of 3,6-bis(trimethylsiloxy)pyridazine and its 4,5-dihalogen-substituted derivatives with 2-chlorotetrahydrofuran and 2-chlorotetrahydropyran has given 3-hydroxy-1-(tetrahydrofuranyl- and 3-hydroxy-1-(tetrahydropyranyl)-1,6-dihydropyridazin-6-ones, the structure of which as 1-substituted derivatives has been confirmed by an investigation of their IR spectra. On the basis of a study of ionization constants, the hypothesis has been put forward that these compounds exist in the hydroxy form.
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