Preparation of Morpholines and Benzoxazines Starting from Nitroepoxides
摘要:
Nitroepoxides are easily transformed into 2,3-disubstituted morpholines and 2,3-disubstituted benzoxazines in a two-step sequence by treatment with N-methylethanolamine and N-methyl-2-hydroxyaniline, respectively, in a highly stereoselective fashion.
Co‐Polymeric Nanosponges from Cellulose Biomass as Heterogeneous Catalysts for amine‐catalyzed Organic Reactions
作者:Laura Riva、Carlo Punta、Alessandro Sacchetti
DOI:10.1002/cctc.202001157
日期:2020.12.16
nano‐porous system guarantees a complete penetration of CNS, allowingreagents to diffuse within. Indeed, by modulating reaction conditions (catalyst loading, temperature, solvent, microwave versus conventional heating, relative ratio of reagents) it was possible to drive selectivity towards the desired products, while maintaining high efficiency in terms of conversion. The catalyst could be re‐used several
Substrate Promiscuity of <i>ortho</i>-Naphthoquinone Catalyst: Catalytic Aerobic Amine Oxidation Protocols to Deaminative Cross-Coupling and <i>N</i>-Nitrosation
作者:Tengda Si、Hun Young Kim、Kyungsoo Oh
DOI:10.1021/acscatal.9b03442
日期:2019.10.4
been identified as versatile aerobicoxidationcatalysts. Primary amines were readily cross-coupled with primary nitroalkanes via deaminative pathway to give nitroalkene derivatives in good to excellent yields. Secondary and tertiary amines were inert to ortho-naphthoquinone catalysts; however, secondary nitroalkanes were readily converted by ortho-naphthoquinone catalysts to the corresponding nitrite
Nitroepoxides are easily transformed into 2,3-disubstituted morpholines and 2,3-disubstituted benzoxazines in a two-step sequence by treatment with N-methylethanolamine and N-methyl-2-hydroxyaniline, respectively, in a highly stereoselective fashion.