N-(4-hydroxyphenyl)butanamide

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

Procedure: Mesyl Chloride (6.0 mmol) was added dropwise at 0° C. to a stirred solution of N,N-diethylaminopropanol (6.0 mmol), TEA (6.0 mmol) in anhydrous DCM (6 mL), and the mixture was stirred at the same temperature for 10 min, and at room temperature for additional 1 h. After the removal of the solvent in vacuo, the solid residue was mixed with 4-butyramidophenol (5.0 mmol), and K2CO3 (10 mmol) in anhydrous DMF (10 mL), following general procedure B. The crude product is purified using silica gel column chromatography 5% MeOH/DCM as eluent to yield 4-(N,N-diethylaminopropoxy)butyranilide (1.4 g). at room temperature for additional 1 h After the removal of the solvent in vacuo The crude product is purified

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

Procedure: Mesyl Chloride (6.0 mmol) was added dropwise at 0° C. to a stirred solution of N,N-diethylaminopropanol (6.0 mmol), TEA (6.0 mmol) in anhydrous DCM (6 mL), and the mixture was stirred at the same temperature for 10 min, and at room temperature for additional 1 h. After the removal of the solvent in vacuo, the solid residue was mixed with 4-butyramidophenol (5.0 mmol), and K2CO3 (10 mmol) in anhydrous DMF (10 mL), following general procedure B. The crude product is purified using silica gel column chromatography 5% MeOH/DCM as eluent to yield 4-(N,N-diethylaminopropoxy)butyranilide (1.4 g). at room temperature for additional 1 h After the removal of the solvent in vacuo The crude product is purified

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

Procedure: 4-aminophenol (550 mg; 5 mmol) is added to a solution of butyric acid (1.4 mL; 15 mmol) in DCM (20 mL) at room temperature and stirred vigorously. To this solution DCC (2.48 g; 12 mmol) is added followed by DMAP (24 mg) and the contents stirred overnight at room temperature. The reaction mixture is then filtered and washed with DCM. The filtrate is concentrated and redissolved in methanol, added with 10% aqueous sodium bicarbonate solution and stirred vigorously until diacylated byproduct disappeared (as detected by LC-MS) to yield 4-butyramidophenol as the only product. The product was used for further transformation without further purification. the contents stirred overnight at room temperature The reaction mixture is then filtered washed with DCM The filtrate is concentrated redissolved in methanol added with 10% aqueous sodium bicarbonate solution stirred vigorously until diacylated byproduct

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

Procedure: 4-aminophenol (550 mg; 5 mmol) is added to a solution of butyric acid (1.4 mL; 15 mmol) in DCM (20 mL) at room temperature and stirred vigorously. To this solution DCC (2.48 g; 12 mmol) is added followed by DMAP (24 mg) and the contents stirred overnight at room temperature. The reaction mixture is then filtered and washed with DCM. The filtrate is concentrated and redissolved in methanol, added with 10% aqueous sodium bicarbonate solution and stirred vigorously until diacylated byproduct disappeared (as detected by LC-MS) to yield 4-butyramidophenol as the only product. The product was used for further transformation without further purification. the contents stirred overnight at room temperature The reaction mixture is then filtered washed with DCM The filtrate is concentrated redissolved in methanol added with 10% aqueous sodium bicarbonate solution stirred vigorously until diacylated byproduct

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

Procedure: Mesyl Chloride (6.0 mmol) was added dropwise at 0° C. to a stirred solution of N,N-diethylaminopropanol (6.0 mmol), TEA (6.0 mmol) in anhydrous DCM (6 mL), and the mixture was stirred at the same temperature for 10 min, and at room temperature for additional 1 h. After the removal of the solvent in vacuo, the solid residue was mixed with 4-butyramidophenol (5.0 mmol), and K2CO3 (10 mmol) in anhydrous DMF (10 mL), following general procedure B. The crude product is purified using silica gel column chromatography 5% MeOH/DCM as eluent to yield 4-(N,N-diethylaminopropoxy)butyranilide (1.4 g). at room temperature for additional 1 h After the removal of the solvent in vacuo The crude product is purified

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

Procedure: 4-aminophenol (550 mg; 5 mmol) is added to a solution of butyric acid (1.4 mL; 15 mmol) in DCM (20 mL) at room temperature and stirred vigorously. To this solution DCC (2.48 g; 12 mmol) is added followed by DMAP (24 mg) and the contents stirred overnight at room temperature. The reaction mixture is then filtered and washed with DCM. The filtrate is concentrated and redissolved in methanol, added with 10% aqueous sodium bicarbonate solution and stirred vigorously until diacylated byproduct disappeared (as detected by LC-MS) to yield 4-butyramidophenol as the only product. The product was used for further transformation without further purification. the contents stirred overnight at room temperature The reaction mixture is then filtered washed with DCM The filtrate is concentrated redissolved in methanol added with 10% aqueous sodium bicarbonate solution stirred vigorously until diacylated byproduct

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

Procedure: Mesyl Chloride (6.0 mmol) was added dropwise at 0° C. to a stirred solution of N,N-diethylaminopropanol (6.0 mmol), TEA (6.0 mmol) in anhydrous DCM (6 mL), and the mixture was stirred at the same temperature for 10 min, and at room temperature for additional 1 h. After the removal of the solvent in vacuo, the solid residue was mixed with 4-butyramidophenol (5.0 mmol), and K2CO3 (10 mmol) in anhydrous DMF (10 mL), following general procedure B. The crude product is purified using silica gel column chromatography 5% MeOH/DCM as eluent to yield 4-(N,N-diethylaminopropoxy)butyranilide (1.4 g). at room temperature for additional 1 h After the removal of the solvent in vacuo The crude product is purified

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

Procedure: 4-aminophenol (550 mg; 5 mmol) is added to a solution of butyric acid (1.4 mL; 15 mmol) in DCM (20 mL) at room temperature and stirred vigorously. To this solution DCC (2.48 g; 12 mmol) is added followed by DMAP (24 mg) and the contents stirred overnight at room temperature. The reaction mixture is then filtered and washed with DCM. The filtrate is concentrated and redissolved in methanol, added with 10% aqueous sodium bicarbonate solution and stirred vigorously until diacylated byproduct disappeared (as detected by LC-MS) to yield 4-butyramidophenol as the only product. The product was used for further transformation without further purification. the contents stirred overnight at room temperature The reaction mixture is then filtered washed with DCM The filtrate is concentrated redissolved in methanol added with 10% aqueous sodium bicarbonate solution stirred vigorously until diacylated byproduct

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

Procedure: The title product was prepared from 4′-hydroxybutyranilide and N-methyl-N-phenylcarbamoyl chloride. The crude product was subjected to preparative HPLC (60%, white solid). HPLC-MS: m/z=313.2 (M+1); Rt: 3.58 min.

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

Procedure: The title product was prepared from 4′-hydroxybutyranilide and N-methyl-N-phenylcarbamoyl chloride. The crude product was subjected to preparative HPLC (60%, white solid). HPLC-MS: m/z=313.2 (M+1); Rt: 3.58 min.

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

Procedure: Mesyl Chloride (6.0 mmol) was added dropwise at 0° C. to a stirred solution of N,N-diethylaminopropanol (6.0 mmol), TEA (6.0 mmol) in anhydrous DCM (6 mL), and the mixture was stirred at the same temperature for 10 min, and at room temperature for additional 1 h. After the removal of the solvent in vacuo, the solid residue was mixed with 4-butyramidophenol (5.0 mmol), and K2CO3 (10 mmol) in anhydrous DMF (10 mL), following general procedure B. The crude product is purified using silica gel column chromatography 5% MeOH/DCM as eluent to yield 4-(N,N-diethylaminopropoxy)butyranilide (1.4 g). at room temperature for additional 1 h After the removal of the solvent in vacuo The crude product is purified

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

Procedure: 4-aminophenol (550 mg; 5 mmol) is added to a solution of butyric acid (1.4 mL; 15 mmol) in DCM (20 mL) at room temperature and stirred vigorously. To this solution DCC (2.48 g; 12 mmol) is added followed by DMAP (24 mg) and the contents stirred overnight at room temperature. The reaction mixture is then filtered and washed with DCM. The filtrate is concentrated and redissolved in methanol, added with 10% aqueous sodium bicarbonate solution and stirred vigorously until diacylated byproduct disappeared (as detected by LC-MS) to yield 4-butyramidophenol as the only product. The product was used for further transformation without further purification. the contents stirred overnight at room temperature The reaction mixture is then filtered washed with DCM The filtrate is concentrated redissolved in methanol added with 10% aqueous sodium bicarbonate solution stirred vigorously until diacylated byproduct