A metal‐free aerobicoxidative C–H sulfenylation of aryl‐fused cyclic amines with various thiols was developed with excellent functional compatibility. While flavin I catalyzed the C–H sulfenylation of indolines to afford 3‐sulfenylindoles, flavin II enabled transformations resulting in substitution at the position para to the N atom on the aryl ring to obtain 6‐sulfenylquinolines.
Visible-light promoted synthesis of 3-arylthioindoles from indoles and diaryl disulfides
作者:Lin-miao Ye、Jie Chen、Peng Mao、Xue-jing Zhang、Ming Yan
DOI:10.1016/j.tetlet.2017.05.090
日期:2017.7
3-Arylthioindoles could be synthesized in good yields via the photoirradiation of indoles and disulfides. The reaction is efficiently promoted by the catalytic amount of sodium iodide. A reactionmechanism involving the electrophilic substitution of indoles with arylsulfenyl iodine intermediates is suggested.
An efficient metal-freesulfenylation of indoles with disulfides has been developed, leading to 3-arylthioindoles in moderate to excellent yields. Furthermore, bromosulfenylation of indoles with disulfides has been realized for the first time providing a new family of 2-bromo-3-arylthioindole derivatives in good yield by the one-pot construction of CS and CBr bonds. It is noteworthy that the system
Efficient Synthesis of 3‐Mercaptoindoles via HI‐Promoted Sulfenylation of Indoles with Sodium Sulfinates
作者:Shengnan Sun、Hexia Ye、Haibo Liu、Yongbiao Guo、Zhenhua Gao、Li Pan、Junchen Li、Xiaojing Bi
DOI:10.1002/open.202300002
日期:2023.3
A new direct sulfenylation method of indoles by sodium sulfinates and hydroiodic acid was developed giving variety of 3-sulfenylindoles in high yields under mild conditions without using any catalysts or other additives. RS-I species generated in situ are supposed to be mainly responsible for the key electrophilic alkyl- or aryl-thiolation process.