Samarium(II)-mediated spirocyclization by intramolecularaddition of arylradicals onto an aromatic ring was achieved by the reaction of N-(2-iodophenyl)-N-alkylbenzamides with SmI2 in the presence of HMPA, yielding spirocyclic indolin-2-one derivatives. The ether congeners afford spirocyclic benzofuran derivatives in moderate yields by arylradicaladdition onto a benzene ring without having an electron-withdrawing
Palladium‐Catalyzed Annulation of Arylbenzamides with Diaryliodonium Salts
作者:Cheng Pan、Limin Wang、Jianwei Han
DOI:10.1002/adsc.202100860
日期:2022.1.18
By using diaryliodoniumsalts, a cylization has been accomplished in the synthesis of N-aryl phenanthridinone derivatives via a cascade of ortho-arylation and Csp2-N bond formation in the presence of palladium catalyst. The reaction exhibits a broad compatibility of readily available N-arylnaphthamides.
The cycliccompounds have wide applications in the design and synthesis of drugs and materials; thus, their efficient construction attracts much attention from the synthetic community. In this letter, we report an efficient method for preparing cycliccompounds starting from the readily available carboxylic acids. This reaction takes place through intramolecular decarbonylative sp2 C–H arylation, enabling
Intramolecular Dehydrogenative Photocyclization of N-Phenyl-1-naphthamides
作者:Hao-Yuan Li、Xiaoying Niu、Shan-Shan Zhang、Shigang Shen、Qing-Yuan Meng、Xiu-Long Yang
DOI:10.1021/acs.orglett.4c01805
日期:2024.6.28
Here, we explore a dehydrogenative 6π photocyclization method for N-substituted naphthalene carboxamides, which can be conducted in air. This method employs DMSO as both the reaction solvent and oxidant while also stabilizing the excited state of the substrate. Furthermore, the addition of photosensitizer enables the reaction to proceed under a 440–445 nm LED source via energy transfer. The proposed
在这里,我们探索了一种N-取代萘甲酰胺的脱氢6π光环化方法,该方法可以在空气中进行。该方法采用DMSO作为反应溶剂和氧化剂,同时稳定底物的激发态。此外,光敏剂的添加使反应能够在 440-445 nm LED 光源下通过能量转移进行。所提出的机制最初通过 DFT 计算得到验证。
Ninomiya, Ichiya; Kiguchi, Toshiko; Yamauchi, Sadami, Journal of the Chemical Society. Perkin transactions I, 1980, p. 197 - 202