The oxazolidone-fused benzodiazepine derivative (1) was prepared by treatment of chlordiazepoxide (2) with sodium hydride and ethyl chloroformate followed by the N-oxide rearrangement of the resultant carbamate (3) with acetic anhydride. The first reaction was found to be accompanied by a multi-step rearrangement of the initially formed 3 as a side reaction giving rise to the indolenine derivative (4). The structure of 4 was determined by X-ray crystallographic analysis.
氧杂
环戊烯衍生的苯二氮卓(1)是通过将
氯二氮平(2)与氢化
钠和
氯乙酸酯反应,随后用
醋酸酐对所得到的
氨基甲酸酯(3)进行N-氧化重排而制备的。研究发现,第一个反应伴随着初步形成的3的多步重排作为副反应,生成了
吲哚啉衍
生物(4)。通过X射线晶体学分析确定了4的结构。