使用[Au(PPh 3)] Cl / Ag 2 CO 3催化的5 -endo-dig环化反应水在微波辐射下,我们开发了一种快速,绿色的路线,由N'-取代的N-(2-炔基苯基)脲制备吲哚-1-甲酰胺。所述方法可耐受多种官能团,包括N'-芳基,烷基,杂环,各种N-(取代的-2-乙炔基苯基)和N-(2-乙炔基吡啶-3-基)脲,并提供中等至高产率的所需产物。
Rh-catalyzed oxidative C2-alkenylation of indoles with alkynes: unexpected cleavage of directing group
作者:Satyasheel Sharma、Sangil Han、Youngmi Shin、Neeraj Kumar Mishra、Hyunji Oh、Jihye Park、Jong Hwan Kwak、Beom Soo Shin、Young Hoon Jung、In Su Kim
DOI:10.1016/j.tetlet.2014.04.001
日期:2014.5
A rhodium-catalyzed oxidative C2-alkenylation of indoles containing a N-(p-tolyl)carboxamide group with substituted alkynes via CC bond formation and subsequent CN bond cleavage has been described. This protocol represents direct access to C2-alkenylated free (NH)-indoles, which are important building blocks in the synthesis of natural and pharmacological compounds.
general method for the synthesis of indole‐1‐carboxamides was developed via copper(I)‐catalyzed N‐carboxamidation of indoles with isocyanates under mild reaction conditions. This process is scalable and tolerates a wide spectrum of indoles and isocyanates to deliver the corresponding products in good to excellent yields, providing a viable synthetic approach to indole‐1‐carboxamides.
Synthesis of Indole-Fused Oxepines via C–H Activation Initiated Diastereoselective [5 + 2] Annulation of Indoles with 1,6-Enynes
作者:Xiaoli Huang、Yan Shi、Yongzhuang Wang、Jiao Jiao、Yuhai Tang、Jing Li、Silong Xu、Yang Li
DOI:10.1021/acs.orglett.1c03106
日期:2021.11.5
A rhodium-catalyzed diastereoselective formal [5 + 2] annulation of indoles with cyclohexadienone-containing 1,6-enynes has been established via indole 2,3-difunctionalization. The reaction, probably proceeding through tandem indole C2–H alkenylation and intramolecular Friedel–Crafts alkylation relay, provides rapid construction of indole-fused oxepines in good to excellent yields with a broad substrate
Synthesis of Unsymmetrical Urea Derivatives via Cu‐Catalyzed Reaction of Acylazide and Secondary Amine
作者:Jivan Shinde、Prakash Bhimrao Patil、Veerababurao Kavala、Ching‐Fa Yao
DOI:10.1002/cbdv.202200346
日期:2022.8
The synthesis of unsymmetricalurea generally requires toxic reagent, solvent and harsh reaction condition. Herein, we introduce Cu-catalyzed greener and safer unsymmetricalurea derivatives synthesis in ethyl acetate. This method minimized utilization of toxic reagent. A variety of indole, amines, and azides with bis-indole successfully employed leading to high yields and gram scale synthesis of isolated
Chemo- and regio-selective amidation of indoles with isocyanates using borane Lewis acids
作者:Ayan Dasgupta、Michael G. Guerzoni、Nusaybah Alotaibi、Yara van Ingen、Kaveh Farshadfar、Emma Richards、Alireza Ariafard、Rebecca L. Melen
DOI:10.1039/d2cy01441f
日期:——
amide/urea functionality using mild, catalytic reaction protocols has always been an important challenge, as functionalised amides and urea derivatives are important scaffolds in medicinal chemistry. Herein we report a facile and mild catalytic reaction protocol towards the amidation of N-methyl indoles/pyrroles (17 examples, yields up to 58%) using B(C6F5)3 (30 mol%). Moreover, our investigation revealed