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首页> 外文期刊>Chemistry of heterocyclic compounds >Unexpected transformations of 11-acetyl-8-bromo-2-methyl-5,6-dihydro-2H-2,6-methano-1,3,5-benzoxadiazocin-4(3H)-one(thione)
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Unexpected transformations of 11-acetyl-8-bromo-2-methyl-5,6-dihydro-2H-2,6-methano-1,3,5-benzoxadiazocin-4(3H)-one(thione)

机译:11-乙酰基-8-溴-2-甲基-5,6-二氢-2H-2,6-甲甲基-1,3,5-苯并二氮杂辛嘧啶-4(3H)的意外转化 - 4(Thione)

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摘要

11-Acetyl-8-bromo-2-methyl-5,6-dihydro-2H-2,6-methano-1,3,5-benzoxadiazocin-4(3H)-one and -4(3H)-thione are prepared via the three-component Biginelli condensation as the only diastereomers. For the first time we observed that these compounds in DMSO solution undergo a slow isomerization with formation of mixtures with the respective 4-(5-bromo-2-hydroxyphenyl)-3,4-dihydropyrimidin-2(1De)-one(thione). The same methanobenzoxadiazocines underwent deacetylation in boiling ethanol in the presence of HCl.
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