Stereoselective Synthesis of Diazabicyclic β-Lactams through Intramolecular Amination of Unactivated C(sp<sup>3</sup>)–H Bonds of Carboxamides by Palladium Catalysis
作者:Shi-Jin Zhang、Wen-Wu Sun、Pei Cao、Xiao-Ping Dong、Ji-Kai Liu、Bin Wu
DOI:10.1021/acs.joc.5b02532
日期:2016.2.5
An efficient C(sp3)–H bond activation and intramolecular amination reaction via palladium catalysis at the β-position of carboxyamides to make β-lactams was described. The investigation of the substrate scope showed that the current reaction conditions favored activation of the β-methylene group. Short sequences were developed for preparation of various diazabicyclic β-lactam compounds with this method
描述了一种有效的C(sp 3)-H键活化和通过钯催化在羧酰胺的β位上制备β-内酰胺的分子内胺化反应。对底物范围的研究表明,当前的反应条件有利于β-亚甲基的活化。通过手性脯氨酸和哌啶衍生物的关键步骤,开发了用于制备各种二氮杂双环β-内酰胺化合物的短序列。