クレダジンの光分解

概要

論文の詳細を見る
The herbicide, credazine, 3-(2-methyiphenoxy) pyridazine, in 200 ppm aqueous solution at pH 6.8 and 9.0 was irradiated with sunlight. It was relatively stable at pH 6.8, and 65% of the starting compound still remained unchanged after 3 weeks exposure. At pH 9.0, however, the photolysis rate was much greater, and the prominent products were 3-pyridazinone-(2 H) and o-cresol. A photonucleophilic substitution by hydroxide ion was apparently responsible for cleavage of the ether linkage. Other products included 3-(2-methylphenoxy) pyridazine-1-oxide, hydroxylated credazine and salicylic acid. o-Cresol in aqueous solution decomposed rapidly, whereas 3-pyridazinone-(2 H) remained unaffected under sunlight.
社団法人日本農芸化学会の論文