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 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