Solvent-Switched Benzylic Methylene Functionalization: Addition, Ring-Opening, Cyclization, and Unexpected Cleavage of C–O and C–C Bonds
作者:Deng Yuan Li、Xue Song Shang、Guo Rong Chen、Pei Nian Liu
DOI:10.1021/ol401470y
日期:2013.8.2
been achieved using imines as reagents and potassium tert-butoxide as the catalyst. Depending on the solvent used, the reaction proceeds by two pathways. In THF, an addition/elimination reaction of exo-cyclic enol ethers with imines provides dihydroisobenzofuran derivatives in good yield. In DMSO, an addition/ring-opening/cyclization cascade reaction occurs with unexpected cleavage of C–O and C–C bonds
使用亚胺作为试剂并使用叔丁醇钾作为催化剂,可以实现环外烯醇醚的分子间苄基亚甲基官能化。根据所使用的溶剂,反应通过两个途径进行。在THF中,的加成/消除反应外切-环烯醇醚与亚胺提供以良好的收率二氢异苯并呋喃衍生物。在DMSO中,加成/开环/环化级联反应会发生意外的C–O和C–C键断裂,从而在环境反应条件下以高收率提供异喹啉-1(2 H)-一产品。