Sulfur-containing benzimidazole derivatives, process for the...

Details Sulfur-containing benzimidazole derivatives, process for the... Sulfur-containing benzimidazole derivatives, process for the...

C - Chemistry, Metallurgy

07

C

260/454.1

C07C 161/02 (1980.01)

Patent

CA 1122605

Abstract of the Disclosure The invention is a process for the preparation of a compound of formula XVII Image (XVII) (wherein R21 stands for hydrogen or amino; and if R21 is hydrogen, then R22 is amino and if R21 represents amino, then R22 stands for hydrogen, halogen, trifluoromethyl, lower alkyl, lower alkoxy, aryloxy or aralkoxy) which comprises reacting a compound of the Formula XVIII Image (XVIII) (wherein R21 and R22 are as defined above) with dirhodane, chlororhodane, ammonium thiocyanate or an alkali metal thiocyanate in the presence of an oxidizing agent and in an anhydrous medium, an agent capable to introduce a thiocyanate group. Some of the compounds within the scope of formula XVII are novel. The compounds of formula XVII are useful intermediates in the preparation of compounds having anthelmintic properties.

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