AgNO3 catalyzed synthesis of 5-substituted-1H-tetrazole via [3+2] cycloaddition of nitriles and sodium azide
作者:Pavnesh Mani、Ashawani Kumar Singh、Satish Kumar Awasthi
DOI:10.1016/j.tetlet.2014.01.117
日期:2014.3
An efficient one-pot, convenient catalysis for the synthesis of 5-substituted-1H-tetrazoles is reported. The [3+2] cycloaddition involves various nitriles, sodium azide in refluxing DMF and AgNO3 as catalyst to give corresponding 5-substituted-1H-tetrazoles in good to excellent yields. It is expected that the reaction proceeds via in situ formation of a silver azide species, which participates in coordination
报道了用于合成5-取代的-1 H-四唑的有效的一锅式方便催化方法。[3 + 2]环加成反应涉及各种腈,回流的DMF中的叠氮化钠和作为催化剂的AgNO 3,以良好或优异的收率得到相应的5-取代的1 H-四唑。预期该反应通过原位形成叠氮化银物质而进行,该叠氮化银物质参与腈部分的配位,然后叠氮化物离子的环加成反应得到四唑。