作者:Renáta Anita Ábrahámi、Loránd Kiss、Pablo Barrio、Ferenc Fülöp
DOI:10.1016/j.tet.2016.10.005
日期:2016.11
A convenient and robust stereocontrolled procedure has been developed for the synthesis of novel trifluoromethyl-containing piperidine and azepane β-amino ester stereoisomers. The synthesis started from readily available unsaturated bicyclic β-lactams and was based on oxidative cleavage of the ring CC double bond followed by ring closure of the diformyl intermediates in the presence of 2,2,2-trifluoroethylamine
已经开发了方便且鲁棒的立体控制方法,用于合成新型的含三氟甲基的哌啶和氮杂环庚烷β-氨基酯立体异构体。合成从容易获得的不饱和双环β-内酰胺开始,并且基于环CC双键的氧化裂解,然后在2,2,2-三氟乙胺盐酸盐存在下通过还原胺化对二甲酰基中间体进行闭环。合成方法已有效地扩展到单氟化和二氟化类似物的合成。