Method of producing aminobenzimidazolones
AssigneesShowa Chemical Co., Ltd., Osaka Municipal Government
InventorsTsuneaki Hirashima, Toshiyuki Miyata, Yoshikazu Yamamoto, Mitsuyuki Kato
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Abstract
A method of producing aminobenzimidazolones which comprises reacting a compound I having the general formula ##STR1## wherein X, Y and Z independently represent a substituent selected from the group consisting of a nitro group and an amino group, with carbon monoxide in solvent in the presence of selenium and an inorganic base or an organic base, and in the presence of water when the compound I has nitro groups, thereby providing a compound II having the general formula ##STR2##
Claims13
A method of producing 5-aminobenzimidazolones which comprises reacting a 2,4-dinitroaniline with carbon monoxide in a solvent in the presence of selenium, a base selected from the group consisting of tertiary amines, N,N-dialkylamides and inorganic bases selected from the group consisting of hydroxides, oxides, carbonates, bicarbonates and sulfides or alkali metals and alkaline earth metals, and water, said 2,4-dinitroaniline containing no additional substituents or only containing substituents which are substantially inert in the reaction.
Dependencies are inferred from the claim text.