Silver-Catalyzed Carboazidation of Arylacrylamides
作者:Xiao-Hong Wei、Ya-Min Li、An-Xi Zhou、Ting-Ting Yang、Shang-Dong Yang
DOI:10.1021/ol402138y
日期:2013.8.16
inexpensive method of nontoxic, silver-salt-catalyzed carboazidation of arylacrylamides to afford corresponding azide oxindoles is reported. This reaction system exhibits great functional group tolerance. All products form a crucial skeleton for the synthesis of various indole alkaloids.
Metal-Free Radical Azidoarylation of Alkenes: Rapid Access to Oxindoles by Cascade CN and CC Bond-Forming Reactions
作者:Kiran Matcha、Rishikesh Narayan、Andrey P. Antonchick
DOI:10.1002/anie.201303550
日期:2013.7.29
A novel method for the oxidative radical azidation of alkenes relies on an azide in combination with a hypervalent iodine reagent. A cascade of CN and CC bond‐forming reactions yields 2‐oxindoles under metal‐free conditions with high reaction rates at ambient temperature and provides access to complex products (see scheme; TMS=trimethylsilyl).
Ag-Promoted Azido-Carbocyclization of Activated Alkenes via CH Bond Cleavage
作者:Yizhi Yuan、Tao Shen、Kui Wang、Ning Jiao
DOI:10.1002/asia.201300960
日期:2013.12
silver‐promoted azido‐carbocyclization of activatedalkenesvia a radical pathway has been developed. Azido oxindoles, which hold great potential for subsequent transformation of the azido unit, are efficiently constructed by this protocol. Radical addition and CH functionalization processes are involved in this transformation with the formation of CN and CC bonds. Silver is observed to promote the
Manganese‐catalyzed Electro‐oxidative Azidation‐annulation Cascade to Access Oxindoles and Quinolinones
作者:Debabrata Maiti、Kingshuk Mahanty、Suman De Sarkar
DOI:10.1002/asia.202100121
日期:2021.4
An environmentally benign and proficient electro‐oxidative tandem azidation‐radical cyclization strategy is reported. Manganese‐catalyzed electrochemical reaction in an undivided cell at room temperature and the use of NaN3 as the cheapest azide source are the key features of this protocol. Using this approach, a series of oxindole and quinolinone derivatives are synthesized in high yields. The synthesized