Tao Yan, Yanhong Chen, Jia Wang, Yuyuan Xie, and Chunhao Yang. Synthesis of 3-Cyanopyrazoles from 3-Trifluoromethyl-pyrazoles via Direct Ammonolysis Reaction // Heterocycles. 2012. Vol. 85. PrePress.
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http://dx.doi.org/10.3987/COM-11-12399