Silver-Mediated Cycloaddition of Alkynes with CF<sub>3</sub>CHN<sub>2</sub>: Highly Regioselective Synthesis of 3-Trifluoromethylpyrazoles
作者:Feng Li、Jing Nie、Long Sun、Yan Zheng、Jun-An Ma
DOI:10.1002/anie.201301870
日期:2013.6.10
Silver screen: The title reaction provides a convenient and efficient method for the construction of 5‐substituted 3‐trifluoromethylpyrazoles under mild reaction conditions. By using this protocol, the marketed drug Celecoxib (antiarthritic) could be easily synthesized (see scheme; DMF=N,N‐dimethylformamide).
银屏:标题反应为在温和的反应条件下构建5取代的3-三氟甲基吡唑提供了一种方便而有效的方法。通过使用该协议,可以轻松合成市售药物塞来昔布(抗关节炎药)(参见方案; DMF = N,N-二甲基甲酰胺)。