So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Bozhenkov, G. V.; Savosik, V. A.; Klyba, L. V.; Zhanchipova, E. R.; Mirskova, A. N.; Levkovskaya, G. G. researched the compound: 3-(Chloromethyl)-1-methyl-1H-pyrazole( cas:84547-64-8 ).Synthetic Route of C5H7ClN2.They published the article 《1-Alkylpyrazoles and 1-alkyl-5-chloropyrazoles from halovinyl ketones and 1,1-dialkylhydrazines》 about this compound( cas:84547-64-8 ) in Russian Journal of Organic Chemistry. Keywords: ketone chloro vinyl heterocyclization hydrazine dialkyl; pyrazole alkyl chloro preparation. We’ll tell you more about this compound (cas:84547-64-8).
Regioselective heterocyclization of chlorovinyl ketones R1COCH:C(R2)Cl (R1 = Me, R2 = H; R1 = n-Pr, R2 = H, Cl; R1 = CH2Cl, R2 = H) with 1,1-dialkyl-hydrazines NH2N(R3)2 (R3 = Me, n-Bu) to pyrazoles I involved intermediate formation of the corresponding dialkylhydrazones II. The mass spectrum fragmentation pattern of chlorine-containing pyrazoles I (R1 = CH2Cl, R2 = H, R3 = Me; R1 = n-Pr, R2 = Cl, R3 = Me) depended on the position of the halogen atom.
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Reference:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics