Temperature-controlled synthesis of N-acyl anthranilamides and quinazoline-4-ones via Pd-catalysed cascade consisting of isocyanide insertion
作者:Irfan Khan、Jaybir Singh、Imran Khan、Sunil Dutt、Shahnawaz Khan、Vikas Tyagi
DOI:10.24820/ark.5550190.p010.868
日期:——
A one step synthesis of functionlized N-acyl anthranilamide via Pd-catalyzed carboxamidation of o-halo substituted N-phenylamide consisting of isocyanide insertion followed by oxidation of the imine intermediate has been achived successfully. Furthermore, at elevated temprature (160oC) the Pd-catalyzed tandem reaction afforded functionlized quinazolin-4-one in a single step without the isolation of
通过 Pd 催化的邻卤取代的 N-苯基酰胺的羧酰胺化反应一步合成功能化的 N-酰基邻氨基苯甲酰胺,由异氰化物插入组成,然后氧化亚胺中间体已经成功实现。此外,在升高的温度 (160oC) 下,Pd 催化的串联反应一步提供了官能化的 quinazolin-4-one,无需分离 N-酰基邻氨基苯甲酰胺,并通过羧酰胺化/去叔丁基化/环脱水级联反应进行。这项工作扩展了异氰化物插入化学在单一步骤中通过过渡金属催化的顺序反应合成各种 N-杂环的应用。