Recyclization of 3-Heteroylpyrrolo [2.1-c][1.4] benzoxazine-1, 2, 4-triones at Treatment with o-Phenylenediamine

IA Tolmacheva, IV Mashevskaya…

文献索引：Tolmacheva; Mashevskaya; Maslivets Russian Journal of Organic Chemistry, 2001 , vol. 37, # 4 p. 596 - 597

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被引用次数: 7

摘要

In reaction of 4-heteryl-2, 4-dioxabutanoic acids and o-aminophenol we obtained for the first time 3-heteroylmethylene-3, 4-dihydro-2H-1, 4-benzoxazine-2-ones (I, II) that by reaction with oxalyl chloride [1] furnished 3-heteroyl-2, 4-dihydro-1H-pyrrolo [2.1-c][1.4] benzoxazine- 1, 2, 3-triones (III, IV). When treated with o-phenylenediamine compounds III, IV undergo recyclization with simultaneous opening of the oxazine and dihydropyrroledione rings [2] ...