5-bromofuran-2-carbohydrazide

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

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 5-bromo-furan-2-carboxylic acid (38.2 g, 200 mmol) and thionylchloride (163.1 g, 1.37 mol) was stirred at 70° C. overnight. The mixture of 5-bromo-furan-2-carbonyl chloride was evaporated, solved in tetrahydrofuran (10 ml) and added to a mixture of hydrazine monohydrate (120.1 g, 2.4 mol), followed by stirring for 0.5 hours at <5° C. Water (50 ml) was added followed by filtration. The crystalline product was recrystallized from ethanol (125 ml, 96%). Yield 21.2 g (52%). was evaporated by stirring for 0.5 hours at <5° C followed by filtration The crystalline product was recrystallized from ethanol (125 ml, 96%)

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

Procedure: 5-Bromo-furan-2-carboxylic acid hydrazide (20.5 g, 100 mmol) was added to a mixture of potassium hydroxide (6.2 g, 110 mmol) and methanol (125 ml). The mixture was stirred for 30 minutes at room temperature. Carbon disulfide (15.2 g, 200 mmol) was added. The mixture was stirred at reflux for 30 hours. Water (60 ml) was added and the excess of carbon disulfide and methanol was evaporated. The aqueous suspension was acidified by adding concentrated hydrochloric acid (14 ml). The product precipitated and was washed with water (20 ml), dried and evaporated. Yield 8.58 g (35%). The mixture was stirred at reflux for 30 hours the excess of carbon disulfide and methanol was evaporated by adding concentrated hydrochloric acid (14 ml) The product precipitated was washed with water (20 ml) dried evaporated

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

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

Procedure: Synthesized as described in Example 35C from [5-cyano-4-(trifluoromethyl)-1H-indol-1-yl]acetic acid and 5-bromo-2-furancarbohydrazide: MS (ES) m/z 437 and 439 (M+1 Br isotopes). Synthesized

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 5-bromo-furan-2-carboxylic acid (38.2 g, 200 mmol) and thionylchloride (163.1 g, 1.37 mol) was stirred at 70° C. overnight. The mixture of 5-bromo-furan-2-carbonyl chloride was evaporated, solved in tetrahydrofuran (10 ml) and added to a mixture of hydrazine monohydrate (120.1 g, 2.4 mol), followed by stirring for 0.5 hours at <5° C. Water (50 ml) was added followed by filtration. The crystalline product was recrystallized from ethanol (125 ml, 96%). Yield 21.2 g (52%). was evaporated by stirring for 0.5 hours at <5° C followed by filtration The crystalline product was recrystallized from ethanol (125 ml, 96%)

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 5-bromo-furan-2-carboxylic acid (38.2 g, 200 mmol) and thionylchloride (163.1 g, 1.37 mol) was stirred at 70° C. overnight. The mixture of 5-bromo-furan-2-carbonyl chloride was evaporated, solved in tetrahydrofuran (10 ml) and added to a mixture of hydrazine monohydrate (120.1 g, 2.4 mol), followed by stirring for 0.5 hours at <5° C. Water (50 ml) was added followed by filtration. The crystalline product was recrystallized from ethanol (125 ml, 96%). Yield 21.2 g (52%). was evaporated by stirring for 0.5 hours at <5° C followed by filtration The crystalline product was recrystallized from ethanol (125 ml, 96%)

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

Procedure: 5-Bromo-furan-2-carboxylic acid hydrazide (20.5 g, 100 mmol) was added to a mixture of potassium hydroxide (6.2 g, 110 mmol) and methanol (125 ml). The mixture was stirred for 30 minutes at room temperature. Carbon disulfide (15.2 g, 200 mmol) was added. The mixture was stirred at reflux for 30 hours. Water (60 ml) was added and the excess of carbon disulfide and methanol was evaporated. The aqueous suspension was acidified by adding concentrated hydrochloric acid (14 ml). The product precipitated and was washed with water (20 ml), dried and evaporated. Yield 8.58 g (35%). The mixture was stirred at reflux for 30 hours the excess of carbon disulfide and methanol was evaporated by adding concentrated hydrochloric acid (14 ml) The product precipitated was washed with water (20 ml) dried evaporated

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

Procedure: Synthesized as described in Example 35C from [5-cyano-4-(trifluoromethyl)-1H-indol-1-yl]acetic acid and 5-bromo-2-furancarbohydrazide: MS (ES) m/z 437 and 439 (M+1 Br isotopes). Synthesized

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 5-bromo-furan-2-carboxylic acid (38.2 g, 200 mmol) and thionylchloride (163.1 g, 1.37 mol) was stirred at 70° C. overnight. The mixture of 5-bromo-furan-2-carbonyl chloride was evaporated, solved in tetrahydrofuran (10 ml) and added to a mixture of hydrazine monohydrate (120.1 g, 2.4 mol), followed by stirring for 0.5 hours at <5° C. Water (50 ml) was added followed by filtration. The crystalline product was recrystallized from ethanol (125 ml, 96%). Yield 21.2 g (52%). was evaporated by stirring for 0.5 hours at <5° C followed by filtration The crystalline product was recrystallized from ethanol (125 ml, 96%)

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

Procedure: 5-Bromo-furan-2-carboxylic acid hydrazide (20.5 g, 100 mmol) was added to a mixture of potassium hydroxide (6.2 g, 110 mmol) and methanol (125 ml). The mixture was stirred for 30 minutes at room temperature. Carbon disulfide (15.2 g, 200 mmol) was added. The mixture was stirred at reflux for 30 hours. Water (60 ml) was added and the excess of carbon disulfide and methanol was evaporated. The aqueous suspension was acidified by adding concentrated hydrochloric acid (14 ml). The product precipitated and was washed with water (20 ml), dried and evaporated. Yield 8.58 g (35%). The mixture was stirred at reflux for 30 hours the excess of carbon disulfide and methanol was evaporated by adding concentrated hydrochloric acid (14 ml) The product precipitated was washed with water (20 ml) dried evaporated

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

Procedure: Synthesized as described in Example 35C from [5-cyano-4-(trifluoromethyl)-1H-indol-1-yl]acetic acid and 5-bromo-2-furancarbohydrazide: MS (ES) m/z 437 and 439 (M+1 Br isotopes). Synthesized