Decarboxylative Synthesis of Functionalized Oxindoles via An Iron-Initiated Radical Chain Process and Application in Constructing Diverse Fused-Indoline Heterocycles
作者:Zhihao Cui、Da-Ming Du
DOI:10.1002/adsc.201700976
日期:2018.1.4
Rapid construction of diverse fused‐indoline−heterocycle (FIH) frameworks including high‐value pyrroloindolines, furoindolines and thienoindolines in a two‐step sequence has been described. The key to success hinges on the adoption of peresters as α‐heteroatom alkyl radical precusors, which can smoothly react with N‐arylacrylamides via a radical chain process initiated by inexpensive FeCl2⋅4H2O to
Photochemical C(sp3)–H Activation for Diversity-Oriented Synthesis of 3-Functionalized Oxindoles
作者:Hao Hou、Wei Ou、Chenliang Su
DOI:10.1021/acs.joc.3c02953
日期:2024.3.15
pathway to synthesize valuable 3-functionalized oxindoles. Traditional cyclization reactions normally require harsh conditions or transition-metal catalysts. Here, we developed a metal-free, diversity-oriented synthesis of 3-functionalized oxindoles via photochemically induced selective cleavage of C(sp3)–H bonds. A variety of 3-substituted oxindoles with functionalities such as ethers, polyhalogens