A new methodology for the synthesis of novel benzo[b][1,4]diazepine derivatives via a one-pot, multi-component reaction of benzaldehyde, o-phenylenediamine, and ethyl propiolate has been developed. Readily available starting materials, operationally simple, metal-free reaction conditions, simplicity of product isolation and good yields are key advantages of this methodology. The structure of the benzo[b][1,4]diazepines were confirmed by NMR, HRMS and XRD.

中文翻译：

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一锅多组分合成乙基（E）-1-（3-乙氧基-3-氧代丙-1-烯-1-基）-2-芳基-2,5-二氢-1 H-苯并[ b] ] [1,4]二氮杂-3-羧酸酯衍生物

已经开发了一种通过苯甲醛，邻苯二胺和丙酸乙酯的一锅多组分反应合成新型苯并[ b ] [1,4]二氮杂卓衍生物的新方法。该方法的主要优点是易于获得的起始原料，操作简单，无金属的反应条件，产品分离的简便性和高收率。通过NMR，HRMS和XRD证实了苯并[ b ] [1,4]二氮杂X的结构。