1: diisopropylamine With n-butyllithium in tetrahydrofuran T=-78 - 20°C; 1 h; 2: 2-chlorophenyl trifluoromethanesulfonate in tetrahydrofuran T=-78 - 20°C; 0.166667 h; Further stages. Title compound not separated from byproducts.;

1: diisopropylamine With n-butyllithium in tetrahydrofuran T=-78 - 20°C; 1 h; 2: m-ClC6H4-OTf in tetrahydrofuran T=-78 - 20°C; 0.166667 h; Further stages.;

in tetrahydrofuran T=-40°C;

lithium diisopropyl amide T=-78°C; 1 h; regioselectivity, var. halogens in var. positions; Product distribution;