O-methyl N-aminocarbamothioate

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of methyl hydrazinecarbothioate (1.0 g, 8.2 mmol) and piperidin-4-ol (1.24 g, 12.3 mmol) in ethanol (7 mL) was refluxed with heating at 90° C. for 2 days. After addition of ethyl acetate, the reaction solution was washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate and concentrated to give the crude desired product. The crude product was used directly for the next reaction. the reaction solution was washed with saturated aqueous sodium chloride dried over anhydrous magnesium sulfate concentrated

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

Procedure: A mixture containing 4.0 g of 1-chloro-4-(4-acetamidophenyl)-2-oxo-3-butene (J. Org. Chem., 28, 2446, 1963) and 2.3 g of hydrazinecarbothioic acid O-methylester in 150 ml of toluene was refluxed for 3 h. The crystals were filtered and washed with toluene. Yield 3.0 g (65%), mp. 235°-240° C. was refluxed for 3 h The crystals were filtered washed with toluene

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried

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

Procedure: A mixture of 2-bromo-p-chloroacetophenone (9.16 g), methoxythiocarbonylhydrazine (13.0 g) and acetonitrile (75 ml) was refluxed overnight and then cooled and filtered. The light yellow solid was washed with hexane and dried yielding 5-(4-chlorophenyl)-3H,6H-1,3,4-thiadiazin-2-one (4.3 g). was refluxed overnight cooled filtered The light yellow solid was washed with hexane dried