(2-phenoxyphenyl)thiourea

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thus produced 1-(2-phenoxyphenyl)-3-benzoylthiourea was dissolved in a mixture of 10% aqueous sodium hydroxide (660 ml) and methanol (530 ml) at 50° C. The reaction mixture was stirred for 30 minutes at 50° C. and then cooled with ice to give crystals, which were separated by filtration, washed with water and dried to give 1-(2-phenoxyphenyl)thiourea. mp: 120°-124° C. cooled with ice to give crystals, which were separated by filtration washed with water dried

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

Procedure: To a mixture of 1-(2-phenoxyphenyl)thiourea (53.4 g) in chloroform (100 ml) was added dropwise a solution of bromine (35.0 g) in chloroform (50 ml) with stirring under ice-cooling during 40 minutes. After refluxing for 1 hour and 40 minutes, the mixture was cooled to ambient temperature. To the resultant mixture was added water and then the mixture was alkalified with 5% sodium hydroxide aqueous solution. The chloroform layer was washed with water, dried over magnesium sulfate, concentrated under reduced pressure to give crystals, which were recrystallized twice from isopropyl alcohol to give 2-amino-4-phenoxybenzothiazole (25.8 g). mp: 135°-137° C. cooling during 40 minutes After refluxing for 1 hour and 40 minutes The chloroform layer was washed with water dried over magnesium sulfate concentrated under reduced pressure to give crystals, which were recrystallized twice from isopropyl alcohol

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

Procedure: To a mixture of 1-(2-phenoxyphenyl)thiourea (53.4 g) in chloroform (100 ml) was added dropwise a solution of bromine (35.0 g) in chloroform (50 ml) with stirring under ice-cooling during 40 minutes. After refluxing for 1 hour and 40 minutes, the mixture was cooled to ambient temperature. To the resultant mixture was added water and then the mixture was alkalified with 5% sodium hydroxide aqueous solution. The chloroform layer was washed with water, dried over magnesium sulfate, concentrated under reduced pressure to give crystals, which were recrystallized twice from isopropyl alcohol to give 2-amino-4-phenoxybenzothiazole (25.8 g). cooling during 40 minutes After refluxing for 1 hour and 40 minutes The chloroform layer was washed with water dried over magnesium sulfate concentrated under reduced pressure to give crystals, which were recrystallized twice from isopropyl alcohol

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thus produced 1-(2-phenoxyphenyl)-3-benzoylthiourea was dissolved in a mixture of 10% aqueous sodium hydroxide (660 ml) and methanol (530 ml) at 50° C. The reaction mixture was stirred for 30 minutes at 50° C. and then cooled with ice to give crystals, which were separated by filtration, washed with water and dried to give 1-(2-phenoxyphenyl)thiourea. cooled with ice to give crystals, which were separated by filtration washed with water dried