A light-driven multicatalytic aza-Wacker protocol for the construction of 3-pyrrolines is reported. A structurally diverse array of sulfonamides possessing homopolar mono-, di- and trisubstituted CC double bonds is selectively converted to the corresponding 3-pyrrolines in up to 95 % isolated yield and with good functional group tolerance. Advanced electrochemical mechanistic investigations suggest
报道了一种用于构建 3-吡咯啉的光驱动多催化氮杂瓦克方案。具有同极性单、二和三取代 CC 双键的结构多样的磺酰胺系列可选择性转化为相应的 3-吡咯啉,分离收率高达 95%,并且具有良好的官能团耐受性。先进的电化学机理研究表明二硫化物助催化剂具有双重作用。
Lewis Acid Catalyzed [1,3]-Sigmatropic Rearrangement of Vinyl Aziridines
作者:Matthew Brichacek、DongEun Lee、Jon T. Njardarson
DOI:10.1021/ol802123e
日期:2008.11.6
This paper details the copper-catalyzed ring expansion of vinyl aziridines to 3-pyrrolines. Broad substrate scope (24 examples) using tosyl- and phthalimide-protected vinyl aziridine substrates is observed. Cu(hfacac)2 was determined to be superior to all other catalysts tested.