Cascade Benzannulation Approach for the Syntheses of Lipocarbazoles, Carbazomycins, and Related Alkaloids
作者:Ankush Banerjee、Shuvendu Saha、Modhu Sudan Maji
DOI:10.1021/acs.joc.2c00042
日期:2022.3.18
Herein, a state-of-the-art one-pot cascade benzannulation technique for the efficacious synthesis of valuable 3-hydroxy-2-methyl carbazoles, a linchpin of more than 25 carbazole-based alkaloids, is unveiled from readily affordable fundamental commodities. The key step of this strategy is gaining aromaticity by site-selective elimination of hydroxyl group controlled by nucleophilicity of the indole
在此,一种最先进的一锅级联苯环化技术可有效合成有价值的 3-羟基-2-甲基咔唑,这是超过 25 种咔唑基生物碱的关键,从易于负担的基本商品中揭晓。该策略的关键步骤是通过由吲哚环的亲核性控制的羟基的位点选择性消除来获得芳香性。本策略显示出优异的官能团耐受性和广泛的底物范围。这种便捷方法的实用性通过10 种具有显着生物活性并因此具有药用重要性的咔唑基生物碱的简明全合成得到了很好的例证。