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2004
Pyridazine derivatives
R 0500
Reaction of [1,4]Benzodioxinopyridazines with Sodium Methoxide and Amines.
The successive reaction of diazadioxins (I) and (VI) with sodium methoxide is stud50- 119 —
ied. The first stage produces ring opened products (III) and (VII) which can be cyclized
by further addition of methoxide to the methoxylated diazadioxins (IV) and (VII) and
again ring-opened by methoxide to the same diaryl ether (V). Furthermore, the synthesis of the starting diazadioxins is reported and their reaction with amines is extensively
studied. — (OISHI*, E.; SUGIYAMA, C.; IWAMOTO, K.-I.; KATO, I.; Heterocycles 63 (2004) 3, 591-608; Div. Environ. Health Sci., Univ. Shizuoka, Yada,
Shizuoka 422, Japan; Eng.) — Mais
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