Intramolecular Azide to Alkene Cycloadditions for the Construction of Pyrrolobenzodiazepines and Azetidino-Benzodiazepines
作者:Karl Hemming、Christopher Chambers、Faisal Jamshaid、Paul O'Gorman
DOI:10.3390/molecules191016737
日期:——
The coupling of proline- and azetidinone-substituted alkenes to 2-azidobenzoic and 2-azidobenzenesulfonic acid gives precursors that undergo intramolecular azide to alkene 1,3-dipolar cycloadditions to give imine-, triazoline- or aziridine-containing pyrrolo[1,4]benzodiazepines (PBDs), pyrrolo[1,2,5]benzothiadiazepines (PBTDs), and azetidino[1,4]benzodiazepines. The imines and aziridines are formed
脯氨酸和氮杂环丁酮取代的烯烃与 2-叠氮苯甲酸和 2-叠氮苯磺酸的偶联得到前体,这些前体经过分子内叠氮化物与烯烃 1,3-偶极环加成反应得到含亚胺、三唑啉或氮丙啶的吡咯并 [1,4]苯二氮卓类 (PBD)、吡咯并 [1,2,5] 苯并噻二氮杂 (PBTD) 和氮杂 [1,4] 苯二氮卓类。三唑啉环加合物失去氮后形成亚胺和氮丙啶。PBD 是一类有效的抗肿瘤抗生素。