Selectfluor-mediated regioselective nucleophilic functionalization of N-heterocycles under metal- and base-free conditions
作者:Long-Yong Xie、Jie Qu、Sha Peng、Kai-Jian Liu、Zheng Wang、Man-Hua Ding、Yi Wang、Zhong Cao、Wei-Min He
DOI:10.1039/c7gc03106h
日期:——
A facile, practical and environmentally attractive protocol for the direct diversification of N-heterocycles under ambient, metal- and base-free conditions was developed.
在常温、无金属和无碱条件下,开发了一种简便、实用且环境友好的直接多样化N-杂环的协议。
Synthesis of N-pyridyl azoles using a deprotometalation-iodolysis-N-arylation sequence and evaluation of their antiproliferative activity in melanoma cells
N-Arylation of pyrrole with 3-iodo-4-methoxypyridine was investigated by copper catalysis under different conditions. The best conditions, that proved to be protocol A (CuI, DMEDA or TMEDA, K3PO4, DMF at 110 °C) and above all protocol B (Cu2O, Cs2CO3, DMSO at 110 °C), were applied to the synthesis of various N-(methoxypyridyl) pyrroles, indoles and benzimidazoles. The behavior of the different iodinated
通过铜催化在不同条件下研究了吡咯与3-碘-4-甲氧基吡啶的N-芳基化反应。最佳条件被证明是协议A(CuI,DMEDA或TMEDA,K 3 PO 4,DMF在110°C)以及最重要的协议B(Cu 2 O,Cs 2 CO 3,DMSO在110°C),用于合成各种N-(甲氧基吡啶基)吡咯,吲哚和苯并咪唑。通过评估从1开始的含碳碘上的部分正电荷,可以合理化不同碘化甲氧基吡啶的行为相应的脱碘底物的1 H NMR化学位移。接下来,将反应与去碘原化-碘分解步骤连接,生成碘化的甲氧基吡啶:粗的碘代中间体直接参与吡咯N-芳基化,以良好的产率提供了预期的N-(甲氧基吡啶基)吡咯。几种合成的N-(甲氧基吡啶基)唑在A2058黑色素瘤细胞中发挥低至中等的抗增殖活性。
Copper-Catalyzed Cross-Dehydrogenative C–N Bond Formation of Azines with Azoles: Overcoming the Limitation of Oxidizing N–O Activation Strategy
Here, we report the copper-catalyzed C2 selective cross-dehydrogenative C-N bond formation of azines with azoles. This straightforward method enables us to address the key limitation of prior N-O activation strategy in C2 amination of azines. The wide substrate scope, high functional group tolerance, and ease of operation of the present method are expected to promote its potential application in synthetic chemistry.
Katritzky, Alan R.; Kurz, Thomas; Zhang, Suoming, Heterocycles, 2001, vol. 55, # 9, p. 1703 - 1710
作者:Katritzky, Alan R.、Kurz, Thomas、Zhang, Suoming、Voronkov, Michael、Steel, Peter J.