Rh(III)-Catalyzed [4 + 2] Annulation of Indoles with Diazo Compounds: Access to Pyrimido[1,6-a]indole-1(2H)-ones
摘要:
The Rh(III)-catalyzed regioselective C2-H bond carbenoid insertion/cyclization of N-amidoindoles with alpha-acyl diazo compounds has been developed. This method provides a novel approach to 2H-pyrimido[1,6-a]indol-1-ones with a broad range of functional group tolerance. The synthetic utilities of the approach are demonstrated by versatile chemical transformations.
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。
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.