作者:Samuel D. Griggs、Nathan Thompson、Daniel T. Tape、Marie Fabre、Paul A. Clarke
DOI:10.1039/c8ob01272e
日期:——
2-Spiropiperidines are a highly desirable, yet under represented structure in drug discovery. 2-Spiropiperidines were synthesised in either a two-pot or one-pot reaction. In the two-pot reaction, the addition of a Weiler dianion to N-Boc imines, followed by deprotection and in situ condensation with a cyclic ketone generated functionalised 2-spiropiperidines in good to excellent yields. In the one-pot
2-螺哌啶是非常合乎需要的,但是在药物发现中却处于代表性的结构之下。2-螺哌啶是通过两锅法或一锅法合成的。在两锅法反应中,向N- Boc亚胺中加入Weiler二价阴离子,然后脱保护并与环酮原位缩合生成官能化的2-螺哌啶核苷,收率好至极佳。在单锅反应中,在梅特兰–贾普条件下,将Chan's二烯添加到N -Boc亚胺中,然后添加碳酸氢钠和环状酮,以中等至良好的收率形成了功能化的2-螺哌啶。