A concise and regioselective synthesis of 6-bromo-5-methoxy-1<i>H</i>-indole-3-carboxylic acid and its derivatives: Strategic development toward core moiety of Herdmanine D
作者:Pankaj Sharma、Nutan Sharma、Gunjan Kashyap、Sunita Bhagat
DOI:10.1080/00397911.2020.1718162
日期:2020.3.3
Abstract A concise, regioselective and highly efficient strategy for the construction of 6-bromo-5-methoxy-1H-indole-3-carboxylic acid has been developed through trifluoroacetylated indole driven hydrolysis. The developed protocol has the advantage of selectively directing bromine substituent on one position. The formation of this regioselective product was confirmed by 1HNMR data. The attractive feature
摘要 通过三氟乙酰化吲哚驱动的水解,开发了一种简洁、区域选择性和高效的 6-溴-5-甲氧基-1H-吲哚-3-羧酸的构建策略。开发的协议具有选择性地将溴取代基引导到一个位置的优势。1HNMR 数据证实了该区域选择性产物的形成。这种新策略的吸引人的特点是 6-bromo-5-甲氧基-1H-indole-3-羧酸是抗炎天然化合物 Herdmanine D 的重要支架。此外,带有羧酸基团的溴吲哚进一步通过超声波照射使用各种芳香族/脂肪族胺在酰胺衍生物中进行功能化。图形概要