%0 Journal Article %T Regioselectivity of 9-chloropyrido[1,2-a]benzimidazole halogenation reaction %A Begunov, R.S. %A Savina, L.I. %K 9-chloropyrido[1,2-a]benzimidazole, N-halogensuccinimide, SEAr reaction, regioselectivity, quantum chemical modelling, DFT method B3LYP/6-31G**, PC GAMESS/Firefly and ORCA 5.0.4 software applications %J From Chemistry Towards Technology Step-By-Step %D 2024 %N 5 %P 7 %I Yaroslavl State Technical University