Described here is the first example of solvent-promoted catalyst-free N-incorporation multicomponent domino reaction for the direct construction of novel π-extension [60]fullerene-fused dihydrocarbolines from simple hydrocarbons. This unprecedented transformation is proposed to proceed by a sequential N-incorporation/[4+2] cycloaddition/elimination process, involving multiple types of bond cleavage and formation
CuBr-Catalyzed Coupling of <i>N-</i>Tosylhydrazones and Terminal Alkynes: Synthesis of Benzofurans and Indoles
作者:Lei Zhou、Yi Shi、Qing Xiao、Yizhou Liu、Fei Ye、Yan Zhang、Jianbo Wang
DOI:10.1021/ol103009n
日期:2011.3.4
A new method for the synthesis of benzofurans or indoles via ligand-free CuBr-catalyzed coupling/cyclization of terminalalkynes with N-tosylhydrazones derived from o-hydroxy- or o-aminobenzaldehydes has been developed. A wide range of functional groups were found that are able to tolerate the reaction conditions.
N-1 and C-2 substituted tryptophans as potential inhibitors of sickle cell hemoglobin gelation
作者:Noojaree Prasitpan、Jayeshkumar N. Patel、Philomen Z. De Croos、Brenda L. Stockwell、Parthasarathy Manavalan、Leela Kar、Michael E. Johnson、Bruce L. Currie
DOI:10.1002/jhet.5570290210
日期:1992.3
A series of N-1 or C-2 phenylalkyl substituted tryptophans and C-1 phenylalkyl substituted 3,4-dihydro-β-carbolines were prepared from the apropriate aniline, 1b or 1e, or tryptophan, 8 or 11, by ring closure methods. None of the compounds prepared were more potent than 5-bromotryptophan (11) as inhibitors of sickle cell hemoglobin gelation.
Herein, we report our recent discovery of mechanochemical C−H arylation and alkylation reaction of indoles using 3 d transition metal (iron and cobalt) via online preparation of highly sensitive organomagnesium reagents. This method addresses the limitations of the 3 d transition-metal catalytic C−H functionalization, and provides an efficient, concise, and sustainable approach for this field.
在此,我们报告了我们最近通过在线制备高灵敏度有机镁试剂发现的使用 3 d 过渡金属(铁和钴)进行吲哚机械化学 C−H 芳基化和烷基化反应的发现。该方法解决了3d过渡金属催化CH官能化的局限性,并为该领域提供了一种高效、简洁和可持续的方法。
Modular Counter-Fischer–Indole Synthesis through Radical-Enolate Coupling
作者:Hyunho Chung、Jeongyun Kim、Gisela A. González-Montiel、Paul Ha-Yeon Cheong、Hong Geun Lee