benzamidourea

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A four neck flask (1000 ml) equipped with a thermometer and a stirrer was charged with 78.2 g (0.75 mol) of 35% hydrochloric acid and 700 ml of deionized water. Added thereto was 68.0 g (0.5 mol) of benzohydrazide at room temperature (20° C.) while stirring, and then 60.7 g (0.75 mol) of potassium cyanate was gradually added in 30 minutes. Stirring was continued at 30° C. for one hour, and then crystal was filtered off and washed with 200 ml of deionized water. This was dried under reduced pressure to obtain white crystal. A four neck flask (1000 ml) equipped with a thermometer and a stirrer Added at room temperature (20° C.) Stirring crystal was filtered off washed with 200 ml of deionized water This was dried under reduced pressure to obtain white crystal

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A four neck flask (1000 ml) equipped with a thermometer and a stirrer was charged with 78.2 g (0.75 mol) of 35% hydrochloric acid and 700 ml of deionized water. Added thereto was 68.0 g (0.5 mol) of benzohydrazide at room temperature (20° C.) while stirring, and then 60.7 g (0.75 mol) of potassium cyanate was gradually added in 30 minutes. Stirring was continued at 30° C. for one hour, and then crystal was filtered off and washed with 200 ml of deionized water. This was dried under reduced pressure to obtain white crystal. A four neck flask (1000 ml) equipped with a thermometer and a stirrer Added at room temperature (20° C.) Stirring crystal was filtered off washed with 200 ml of deionized water This was dried under reduced pressure to obtain white crystal