A practical base mediated synthesis of 1,2,4-triazoles enabled by a deamination annulation strategy
作者:Chunyan Zhang、Zuyu Liang、Xiaofei Jia、Maorong Wang、Guoying Zhang、Mao-Lin Hu
DOI:10.1039/d0cc05828a
日期:——
A rapid and efficient base mediated synthesis of 1,3,5-trisubstituted 1,2,4-triazoles has been developed from annulation of nitriles with hydrazines, which can be scaled up to a wide range of triazoles in good to excellent yields. Ammonia gas is liberated during the reaction, and halo, hetero functional groups as well as free hydroxyl, amino are tolerated in this transformation. A variety of alkyl
通过腈与肼的环合反应,已经开发出一种快速,有效的碱介导的1,3,5-三取代的1,2,4-三唑合成方法,该方法可按比例放大至各种三唑,且收率良好至优异。在反应过程中释放出氨气,并且在这种转化过程中,卤素,杂官能团以及游离羟基,氨基都可以被吸收。可以使用此程序将各种烷基,芳基取代的腈用芳香族和脂肪族肼官能化。这一发现为合成各种15N标记的1,2,4-三唑衍生物提供了一种实用且有用的策略,两种类型的mGlu5受体药物可以很容易地以一锅方式组装。