Concurrent alkylation-methoxylation of 4,5-dihalopyridazin-6-ones and synthesis of 5-halo-4-hydroxypyridazin-6-ones
作者:Su-Dong Cho、Woo-Yong Choi、Yong-Jin Yoon
DOI:10.1002/jhet.5570330605
日期:1996.11
1-Alkyl-5-halo-4-methoxypyridazin-6-ones were synthesized from 1-alkyl-4,5-dihalopyridazin-6-ones by the concurrentalkylation-methoxylation. 1-Alkyl-5-halo-4-hydroxypyridazin-6-ones were also prepared.
Novelpyridazino[4,5-b][1,4]oxazine-3,5-diones were synthesized from N-[2-(3,4-dimethoxyphenyl)-ethyl]-2-chloroacetamide (or 2-chloropropanamide) and 1-alkyl-5-halo-4-hydroxypyridazin-6-ones in good yield.
由N- [2-(3,4-二甲氧基苯基)-乙基] -2-氯乙酰胺(或2-氯丙酰胺)合成新型哒嗪并[4,5- b ] [1,4]恶嗪-3,5-二酮。1-烷基-5-卤代-4-羟基哒嗪-6-酮具有良好的收率。