1,3,5-Trimethylpyrazole and 1-ethyl-3,5-dimethylpyrazole undergo lithiation exclusively at the α-position of the N-alkyl group. 1-Benzylpyrazole is metallated under kinetic control at -78 deg C at the CH2 group, but the metallorganic intermediate rearrang
Katritzky, Alan R.,Jayaram, Chandra,Vassilatos, Socrates N.
p. 2023 - 2029
(2007/10/02)
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