Ferrier-Type <i>N</i>-Glycosylation: Synthesis of <i>N</i>-Glycosides of Enone Sugars
作者:Feiqing Ding、Ronny William、Xue-Wei Liu
DOI:10.1021/jo302619b
日期:2013.2.1
A mild and efficient protocol for the stereoselective synthesis of N-glycosides of enone sugars has been developed. The reaction proceeds to provide N-glycosides of enone sugars in moderate to good yields with preferential α-anomeric selectivity. Additionally, applications of the N-glycosides of enone sugar derivatives as precursor to assemble some biochemically functional derivatives have also been
2,2,2-Trichloroethylsulphonyl, 2,2,2-trichloroethoxysulphonyl, and trifluoroacetyl isocyanates in β-lactam synthesis
作者:Anthony G. M. Barrett、Ashley Fenwick、Michael J. Betts
DOI:10.1039/c39830000299
日期:——
Condensation of the title isocyanates with olefins and subsequent dissolving-metal reduction (sulphonyl derivatives) or chromatography on Florisil (trifluoroacetyl derivatives) gave several N-unsubstituted β-lactams including two 8-aza-2-oxabicyclo[4.2.0]octan-7-one derivatives.