Lawesson's reagent → HCID 178462789, compound

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The title compound is analogously synthesized as described for 7-[2-(6-{4-cyano-phen-1-yl}-3H-imidazo[4,5-b]pyridin-2-yl)-ethyl]-azepan-2-thione (compound A2) from 170 mg of 7-(2-{6-[4-(4-ethyl-piperazine-1-sulfonyl)-phenyl]-3H-imidazo[4,5-b]pyridin-2-yl}-ethyl)-azepan-2-one (compound B7) and 142 mg of Lawesson's reagent at 100° C. for 2.5 hours in 20 ml of dioxane. Purification by chromatography on flash silica gel (eluent gradient: dichloromethane/0-10 vol. % ethanol) affords 163 mg of the title compound as a waxy solid. ESI-MS: 527.3 (MH+). TLC: Rf=0.34 (dichloromethane/ethanol 10:1 parts by volume).

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