Abstract

Ethyl 1,2,4-trioxo-2,4-dihydro-1H-pyrrolo[2,1-c][1,4]benzoxazine-3-carboxylates reacted with ethyl (2Z)-[2-oxo-2H-1,4-benzoxazin-3(4H)-ylidene]acetates to give ethyl 3a-[2-ethoxy-2-oxo-1-(2-oxo-2H-1,4-benzoxazin-3-yl)ethyl]-2-hydroxy-1,4-dioxo-3a,4-dihydro-1H-pyrrolo[2,1-c][1,4]benzoxazine-3-carboxylates. The product structure was confirmed by X-ray analysis.

中文翻译：

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戊烯并吡咯二酮与1，3-C，N-双亲核试剂的反应。螺环杂环化中间产物的分离

摘要

1,2,4-三氧杂环丁-2,4-二氢-1 H-吡咯并[2,1- c ] [1,4]苯并恶嗪-3-羧酸乙酯与（2 Z）-[2-oxo-2 H -1,4-苯并恶嗪-3（4 H）-亚烷基]乙酸酯得到3a- [2-乙氧基-2-氧-1-（2-氧代-2 H -1,4-苯并恶嗪-3-基）乙基）乙基] -2-羟基-1,4-二氧代-3a，4-二氢-1 H-吡咯并[2,1- c ] [1,4]苯并恶嗪-3-羧酸盐。通过X射线分析确认了产物结构。