N-Heterocyclic Carbene Catalyzed Synthesis of Trisubstituted Epoxides via Tandem Amidation/Epoxidation Sequence
作者:E. Sankari Devi、Thangavel Pavithra、A. Tamilselvi、Subbiah Nagarajan、Vellaisamy Sridharan、C. Uma Maheswari
DOI:10.1021/acs.orglett.0c01017
日期:2020.5.1
chalcones and N,N-dimethylformamide (DMF) for the synthesis of trisubstituted epoxides employing N-heterocyclic carbene catalysis was developed. This reaction was performed under metal-free conditions in the presence of tert-butyl hydroperoxide (TBHP) as the oxidant. Trisubstituted epoxides bearing a ketone and an amide functionality (N,N-dimethyl formyl group) were synthesized starting from a wide range
开发了各种取代查尔酮和 N,N-二甲基甲酰胺 (DMF) 之间的串联酰胺化/环氧化序列,用于利用 N-杂环卡宾催化合成三取代环氧化物。该反应在无金属条件下在叔丁基过氧化氢 (TBHP) 作为氧化剂的存在下进行。具有酮和酰胺官能团(N,N-二甲基甲酰基)的三取代环氧化物从各种查尔酮开始合成,产率中等至良好,具有优异的非对映选择性。