Ammonia → HCID 45078476, compound

Participants

Reaction Steps

3.7 g 4-methoxy-1-methyl-1,3-dihydrobenzimidazol-2-one are suspended in 15 ml phosphorus oxychloride. The reaction mixture is stirred for 3 hours at reflux temperature, slowly combined with ice water and made alkaline with conc. ammonia. The precipitated product is suction filtered. 3.6 g product are obtained as a solid. M.p=118-119° C.

Provenance & Evidence