1,4-Benzodiazepine N-Nitrosoamidines: Useful Intermediates in the Synthesis of Tricyclic Benzodiazepines
作者:Santos Fustero、Javier González、Carlos Del Pozo
DOI:10.3390/11080583
日期:——
1,4-Benzodiazepine N-nitrosoamidines have been used as scaffolds for the preparation of different tricyclic derivatives. Replacement of the N-nitrosoamidine moiety through treatment with the nucleophiles acetylhydrazine, aminoacetaldehyde dimethylacetal and 1-amino-2-propanol, followed by an acid-catalyzed cyclization step, afforded triazolo and imidazobenzodiazepines 1, 6, and 7, respectively, in
1,4-苯并二氮杂N-亚硝基脒已被用作制备不同三环衍生物的支架。通过用亲核试剂乙酰肼、氨基乙醛二甲基乙缩醛和 1-氨基-2-丙醇处理替换 N-亚硝基脒部分,然后进行酸催化环化步骤,分别以良好的产率得到三唑并和咪唑并苯二氮卓类 1、6 和 7 . 当乙酰肼用作亲核试剂时,整个过程分别为阿普唑仑 (1b) 和三唑仑 (1c) 提供了替代途径。