Copper-Catalyzed Domino Homologation and Cycloisomerization Reactions for 3-Pyrroline Synthesis
作者:Ye Ho Shin、Muchchintala Maheswara、Joon Young Hwang、Eun Joo Kang
DOI:10.1002/ejoc.201301621
日期:2014.4
catalyst for a dominoreaction sequence leading to 3-pyrrolines. The Cu(I)-catalyzed Crabbe reaction of propargyl sulfonamide and selective cycloisomerization of the allene intermediate were carried out using microwave irradiation conditions affording a wide range of 2-substituted- and 2,5-disubstituted-3-pyrrolines. Mechanistic studies of the reaction intermediates revealed two possible reaction pathways;
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。