The novel chemical reagent, C2 F5 CHN2 , is generated in situ from C2 F5 CH2 NH2 ⋅HCl and sodium nitrite. It reacts with mono- and disubstituted electron-deficient alkenes at room temperature to afford C2 F5 -pyrazolines in excellent yields.
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Pavel K. Mykhailiuk (2014) studied this question.
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