Palladium-Catalyzed Oxidative Carbonylation of<i>N</i>-Allylamines for the Synthesis of β-Lactams
作者:Wu Li、Chao Liu、Heng Zhang、Keyin Ye、Guanghui Zhang、Wangzheng Zhang、Zhengli Duan、Shuli You、Aiwen Lei
DOI:10.1002/anie.201309081
日期:2014.2.24
β‐Lactam scaffolds are considered to be ideal building blocks for the synthesis of nitrogen‐containing compounds. A new palladium‐catalyzedoxidativecarbonylation of N‐allylamines for the synthesis of α‐methylene‐β‐lactams is reported. DFT calculations suggest that the formation of β‐lactams via a four‐membered‐ring transition state is favorable.
Synthesis of Optically Active α-Methylene β-Lactams through Lipase-Catalyzed Kinetic Resolution
作者:Waldemar Adam、Peter Groer、Hans-Ulrich Humpf、Chantu R. Saha-Möller
DOI:10.1021/jo0003089
日期:2000.8.1
is reported. The optically active alpha-methylene beta-lactams 5a-c, and their corresponding amino acids 6a-c have been readily made available throughlipase-catalyzed kinetic resolution in high enantiomeric purity (up to 99% ee). The N-substituted beta-lactam derivatives 4a, b and 10 are not accepted by the lipases and were prepared in optically active form by chemical transformation.