1-amino-3-benzylthiourea

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

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

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

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

Procedure: Benzylisothiocyanate (4.0 g) is slowly added to 1.8 g of anhydrous hydrazine in 50 ml dioxane. The reaction mixture is stirred at room temperature, the dioxane is then removed in vacuo and the residue is recrystallised from ethanol to give 4-benzylthiosemicarbazide as a crystalline solid (2.5 g), m.p. 127° C. the dioxane is then removed in vacuo the residue is recrystallised from ethanol

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

Procedure: Benzylisothiocyanate (4.0 g) is slowly added to 1.8 g of anhydrous hydrazine in 50 ml dioxane. The reaction mixture is stirred at room temperature, the dioxane is then removed in vacuo and the residue is recrystallised from ethanol to give 4-benzylthiosemicarbazide as a crystalline solid (2.5 g), m.p. 127.6° C. the dioxane is then removed in vacuo the residue is recrystallised from ethanol

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

Procedure: Benzylisothiocyanate (4.0 g) is slowly added to 1.8 g of anhydrous hydrazine in 50 ml dioxane. The reaction mixture is stirred at room temperature, the dioxane is then removed in vacuo and the residue is recrystallised from ethanol to give 4-benzylthiosemicarbazide as a crystalline solid (2.5 g), m.p. 127.6° C. the dioxane is then removed in vacuo the residue is recrystallised from ethanol

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

Procedure: The title compound was prepared from a mixture of 4-benzylthiosemicarbazide (100 mg, 0.552 mmol) and 2-pyridinecarboxaldehyde (52 μL, 0.552 mmol) similar to Example 3 and isolated as a pale white solid (83 mg, 59%). 1H NMR (DMSO-d6): 11.84 (s, 1H), 9.27 (t, J=5.7 Hz, 1H), 8.57 (d, J=4.8 Hz, 1H), 8.30 (d, J=8.1 Hz, 1H), 8.13 (s, 1H), 7.83 (t, J=7.7 Hz, 1H), 7.40-7.31 (m, 3H), 7.26 (d, J=4.8 Hz, 1H), 4.86 (d, J=6.0 Hz, 2H).

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 50 mL round-bottomed flask containing 4-[1-[4-(trifluoromethoxy)phenyl]-1,2,4-triazol-3-yl]benzaldehyde (500 mg, 1.5 mmol) in EtOH (3 mL) was added 4-benzylthiosemicarbazide (650 mg, 3.6 mmol). The reaction mixture was heated at 80° C. overnight. H2O was added upon completion of the reaction and the crude product material was isolated by vacuum filtration. The title compound was isolated via RP-HPLC as a white solid (390 mg, 52% yield): mp 220-224° C.; 1H NMR (400 MHz, CDCl3) δ 9.29 (s, 1H), 8.59 (s, 1H), 8.21 (d, J=8.4 Hz, 2H), 7.85-7.79 (m, 3H), 7.71 (d, J=8.4 Hz, 2H), 7.46-7.30 (m, 8H), 5.01 (d, J=5.8 Hz, 2H); ESIMS 497.2 (M+H). the crude product material was isolated by vacuum filtration

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 50 mL round-bottomed flask containing 4-[1-[4-(trifluoromethoxy)phenyl]-1,2,4-triazol-3-yl]benzaldehyde (500 mg, 1.5 mmol) in EtOH (3 mL) was added 4-benzylthiosemicarbazide (650 mg, 3.6 mmol). The reaction mixture was heated at 80° C. overnight. H2O was added upon completion of the reaction and the crude product material was isolated by vacuum filtration. The title compound was isolated via RP-HPLC as a white solid (390 mg, 52% yield): mp 220-224° C.; 1H NMR (400 MHz, CDCl3) δ 9.29 (s, 1H), 8.59 (s, 1H), 8.21 (d, J=8.4 Hz, 2H), 7.85-7.79 (m, 3H), 7.71 (d, J=8.4 Hz, 2H), 7.46-7.30 (m, 8H), 5.01 (d, J=5.8 Hz, 2H); ESIMS 497.2 (M+H). the crude product material was isolated by vacuum filtration

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 50 mL round-bottomed flask containing 4-[1-[4-(trifluoromethoxy)phenyl]-1,2,4-triazol-3-yl]benzaldehyde (500 mg, 1.5 mmol) in EtOH (3 mL) was added 4-benzylthiosemicarbazide (650 mg, 3.6 mmol). The reaction mixture was heated at 80° C. overnight. H2O was added upon completion of the reaction, and the crude product material was isolated by vacuum filtration. The title compound was isolated via RP-HPLC as a white solid (390 mg, 52%): mp 220-224° C.; 1H NMR (400 MHz, CDCl3) δ 9.29 (s, 1H), 8.59 (s, 1H), 8.21 (d, J=8.4 Hz, 2H), 7.85-7.79 (m, 3H), 7.71 (d, J=8.4 Hz, 2H), 7.46-7.30 (m, 8H), 5.01 (d, J=5.8 Hz, 2H); ESIMS m/z 497.2 (M+H). the crude product material was isolated by vacuum filtration

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 50 mL round-bottomed flask containing 4-[1-[4-(trifluoromethoxy)phenyl]-1,2,4-triazol-3-yl]benzaldehyde (500 mg, 1.5 mmol) in EtOH (3 mL) was added 4-benzylthiosemicarbazide (650 mg, 3.6 mmol). The reaction mixture was heated at 80° C. overnight. H2O was added upon completion of the reaction, and the crude product material was isolated by vacuum filtration. The title compound was isolated via RP-HPLC as a white solid (390 mg, 52%): mp 220-224° C.; 1H NMR (400 MHz, CDCl3) δ 9.29 (s, 1H), 8.59 (s, 1H), 8.21 (d, J=8.4 Hz, 2H), 7.85-7.79 (m, 3H), 7.71 (d, J=8.4 Hz, 2H), 7.46-7.30 (m, 8H), 5.01 (d, J=5.8 Hz, 2H); ESIMS m/z 497.2 (M+H). the crude product material was isolated by vacuum filtration

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

Procedure: The title compound was prepared in a manner similar to that described in Example 5 starting with benzyl isothiocyanate. The intermediate 4-benzyl-3-thiosemicarbazide (1.81 g) was treated with ethyl chloroformate (1.09 g) as in Example 5. The reaction product 4-benzyl-3-hydroxy-5-mercapto-1,2,4-triazole (1.04 g) was reacted with 1.05 g of 2-bromo-5-nitrothiazole as in Example 5. Crystallization from ethanol and water gave 0.3 g of 4-benzyl-3-hydroxy-5-[(5-nitrothiazol-2-yl)mercapto]1,2,4-triazole, a yellow solid, MP 221°-224° C. The title compound was prepared in a manner similar to Crystallization from ethanol and water