O-[tert-butyl(dimethyl)silyl]hydroxylamine

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

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

Procedure: 4-(4-{4-[6-(4-methyl-piperazin-1-yl)-pyridin-3-yl]-thiazol-2-yl}-tetrahydro-pyran-4-yl)-benzoic acid (200 mg, 0.215 mmol), HATU (90 mg, 1.1 eq), H2N-OTBS (2.0 eq), and TEA (0.1 mL, 3 eq) were mixed in DMF and stirred for 2 hours. The reaction mixture was washed with water and then extracted with EtOAc. The organic phase was evaporated, suspended in 1N HCl, and slowly evaporated at 50° C. for 30 minutes to give title compound. MS found for C25H29N5O3S as (M+H)+ 480.15. 1H NMR (400 MHz, dmso-d6): δ: 11.13 (s, 1H), 8.99 (s, 1H), 8.68 (d, J=2.4 Hz, 1H), 8.00 (dd, J=8.8, 6.4 Hz, 1H), 7.81 (s, 1H), 7.68 (d, J=8.4 Hz, 2H), 7.50 (d, J=8.4 Hz, 2H), 6.87 (d, J=8.8 Hz, 1H), 3.73-3.70 (m, 2H), 3.61-3.56 (m, 2H), 3.53-3.50 (m, 4H), 2.65-2.60 (m, 2H), 2.44-2.20 (m, 4H), 2.38-2.32 (m, 2H), 2.22 (s, 3H). The reaction mixture was washed with water extracted with EtOAc The organic phase was evaporated slowly evaporated at 50° C. for 30 minutes

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

Procedure: A solution of example 108 (1.15 g) in dichloromethane (30 ml) at 0° C. was treated with triethylamine (0.52 g) followed by isopropenyl chloroformate (0.41 g), and the mixture was stirred for 1 h. O-tert-butyldimethylsilylhydroxylamine (0.50 g) was then added and the mixture was stirred for a further 18 h. The reaction mixture was washed with 10% citric acid (20 ml), saturated sodium bicarbonate (20 ml) and the concentrated to dryness in vacuo. A solution of the residual solid in tetrahydrofuran (30 ml) and water (5 ml) was then treated with a 1.0 M solution of tetrabutylammonium fluoride in tetrahydrofuran (1 ml) and stirred 1 h. the resultant crude mixture was concentrated on to silica and purified by chromatography, eluting with 5% methanol in dichloromethane, to provide the title compound as a white solid (0.10 g). the mixture was stirred for a further 18 h The reaction mixture was washed with 10% citric acid (20 ml), saturated sodium bicarbonate (20 ml) the concentrated to dryness in vacuo A solution of the residual solid in tetrahydrofuran (30 ml) and water (5 ml) was then treated with a 1.0 M solution of tetrabutylammonium fluoride in tetrahydrofuran (1 ml) stirred 1 h. the resultant crude mixture was concentrated on to silica purified by chromatography eluting with 5% methanol in dichloromethane

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

Procedure: O-(tert-butyldimethylsilyl)hydroxylamine (57 mg, 0.39 mmol) and 1-(3-dimethyl-aminopropyl)-3-ethylcarbodiimide hydrochloride (59 mg, 0.31 mmol) were added to a solution of 1-[4-(4-chlorophenyl)piperazine-1-sulfonyl]piperidine-2-(RS)-carboxylic acid (100 mg, 0.26 mmol), [prepared as described above] in methylene chloride (4 ml). The reaction mixture was stirred overnight at RT and then diluted with methylene chloride. The solution was washed with water, 10% citric acid, and brine, and dried over MgSO4. After the organics were removed the residue was chromatographed (SiO2, 2030% ethyl acetate/hexane) to give N-tert-butyldimethylsiloxy-1-[4-(4-chlorophenyl)piperazine-1-sulfonyl]piperidine-2-(RS)-carboxamide as a colorless foam (56%). The solution was washed with water, 10% citric acid, and brine dried over MgSO4 After the organics were removed the residue was chromatographed (SiO2, 2030% ethyl acetate/hexane)

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

Procedure: Ex-33A: To a solution of O-(tert-butyldimethylsilyl)hydroxylamine (0.74 g, 5 mmol) and triethylamine (1.01 g, 10 mmol) in 25 ml THF, 4-acetylbenzenesulfonyl chloride(1.1 g, 5 mmol) was added at 0° C. The mixture was stirred overnight and then poured into H2O. The precipitate was filtered, dried, and recrystallized from EtOAc/Hexene to give 1.3 g (76.8%) of 4-acetyl-N-(tert-butyldimethylsiloxy)benzenesulfonamide as a white solid. 1H-NMR (300 MHz, CDCl3) δ 8.11 (d, J=9 Hz, 2H), 8.01 (d, J=9 Hz, 2H), 6.59 (b, 1H), 2.67 (s, 3H), 0.89 (s, 9H), 0.20 (s, 6H). The precipitate was filtered dried recrystallized from EtOAc/Hexene

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

Procedure: O-(tert-Butyldimethyl-silyl) hydroxylamine (1.8 g, 12.3 mmol) was added to a solution of 3-nitro-1,8-naphthalic anhydride (2.0 g, 8.2 mmol) in 50 mL of pyridine. The solution was refluxed for 4 hours and concentrated in vacuo. Purification as described in Example A-1 gave 2.6 g of the title compound. The solution was refluxed for 4 hours concentrated in vacuo Purification

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

Procedure: O-(tert-Butyldimethyl-silyl) hydroxylamine (1.8 g, 12.3 mmol) was added to a solution of 3-nitro-1,8-naphthalic anhydride (2.0 g, 8.2 mmol) in 50 mL of pyridine. The solution was refluxed for 4 hours and concentrated in vacuo. Purification as described in Example A-1 gave 2.6 g of the title compound. The solution was refluxed for 4 hours concentrated in vacuo Purification

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

Procedure: To the vial containing (R)-4-(1-aminoethyl)benzoic acid hydrochloride was added tert-butyl isocyanate (0.023 mL, 0.198 mmol), N,N dimethylformamide (3.0 mL), and triethylamine (0.22 mL, 1.59 mmol). After the reaction was stirred at rt for 16 h, HATU (0.075 g, 0.198 mmol) in N,N-dimethylformamide (0.5 mL) was added, immediately followed by the addition of O-(tert-butyldimethylsilyl)hydroxylamine (0.044 g, 0.30 mmol) in DCM (1 mL). This mixture was shaken at rt for 1 hr, after which the mixture was evaporated to dryness. To the residue was added hydrochloric acid (4 mL, 1% in IPA). After shaking at rt for 30 min, solid NaHCO3 was added to quench the excess acid, and the mixture was evaporated to dryness to give a solid residue. This solid was dissolved in DMSO (1.2 mL), and filtered; then purified via Gilson prep-HPLC [15-38% MeCN—H2O] to give the title compound (0.026 g, 47%) as a white solid. LC-MS: (FA) ES+ 280; 1H NMR (Methanol-d4, 400 MHz) 87.69 (d, J=8.3 Hz, 2H), 7.37 (d, J=8.3 Hz, 2H), 4.80 (q, J=7.0 Hz, 1H), 1.37 (d, J=7.0 Hz, 3H), 1.26 (s, 9H). This mixture was shaken at rt for 1 hr after which the mixture was evaporated to dryness To the residue was added hydrochloric acid (4 mL, 1% in IPA) After shaking at rt for 30 min solid NaHCO3 was added to quench the excess acid the mixture was evaporated to dryness to give a solid residue filtered then purified via Gilson prep-HPLC [15-38% MeCN—H2O]

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

Procedure: To a 2-dram vial containing (R)-tert-butyl 4-(1-(4-(trifluoromethyl)phenylsulfonamido)ethyl)benzoate was added 1,2-dichloroethane (2 mL), and trifluoroacetic acid (0.246 mL, 3.20 mmol). After shaking at rt for 4 h, the mixture was evaporated to dryness to give a residue which was azetroped with toluene (2×5 mL). To the solid residue in another vial was added HATU (0.091 g, 0.24 mmol), N,N-dimethylformamide (1.5 mL), triethylamine (0.18 mL, 1.28 mmol). The mixture was stirred for 10 min then O-(tert-butyldimethylsilyl)hydroxylamine (0.047 g, 0.32 mmol) in DCM (0.5 mL) was added. The solution was shaken at rt for 2 h, after which the solvent was then completely removed to afford a brown oil. To this oil in another vial was added hydrochloric acid (3.5 mL, 1% in IPA). After shaking at rt for 30 min, solid NaHCO3 was added to quench the excess acid, and the solvent was then removed. To the solid residue was added DMSO (1.2 mL). After filtration, the DMSO solution was purified by Gilson prep-HPLC to give the title compound (0.091 g, 15%) as a white solid. LC-MS: (FA) ES− 387; 1H NMR (Methanol-d4, 400 MHz) δ7.79 (d, J=8.3 Hz, 2H), 7.66 (d, J=8.3 Hz, 2H), 7.51 (d, J=8.5 Hz, 2H), 7.19 (d, J=8.5 Hz, 2H), 4.53 (q, J=7.0 Hz, 1H), 1.36 (d, J=7.0 Hz, 3H). the mixture was evaporated to dryness to give a residue which The mixture was stirred for 10 min The solution was shaken at rt for 2 h after which the solvent was then completely removed to afford a brown oil After shaking at rt for 30 min to quench the excess acid the solvent was then removed To the solid residue was added DMSO (1.2 mL) After filtration the DMSO solution was purified by Gilson prep-HPLC

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

Procedure: To a 2-dram vial containing tert-butyl 4-{(1R)-1-[(1-benzofuran-2-ylcarbonyl)amino]ethyl}benzoate was added DCM (2.5 mL), and trifluoroacetic acid (0.28 mL, 3.60 mmol). The mixture was stirred at rt for 6 h then evaporated to give an oil residue. To the residue was added HATU (0.10 g, 0.27 mmol), triethylamine (0.25 mL, 1.80 mmol), and DCM (2.5 mL). After stirring at rt for 30 min, O-(tert-butyldimethylsilyl)hydroxylamine (0.053 g, 0.360 mmol) was added. The mixture was stirred at rt for 2 h, then the solvent was completely removed to give a sticky brown oil. To this oil residue was added hydrochloric acid (4.0 mL, 1% v/v in IPA). After stirring at rt for 30 min, the solvent was evaporated to dryness to give a solid. To the solid was then added DMSO (1.1 mL). The solution was filtered and purified by Gilson prep-HPLC [25-50% MeCN—H2O] to give N-((1R)-1-{4-[(hydroxyamino)carbonyl]phenyl}ethyl)-1-benzofuran-2-carboxamide (0.0148 g, 24%) as a white solid. LC-MS: (FA) ES+ 325; 1H NMR (Methanol-d4, 400 MHz) δ 7.71 (m, 3H), 7.60 (d, J=8.5 Hz, 1H), 7.50 (m, 3H), 7.45 (t, J=7.0 Hz, 1H), 7.31 (t, J=7.8 Hz, 1H), 5.30 (q, J=7.2 Hz, 1H), 1.61 (d, J=7.0 Hz, 3H). then evaporated to give an oil residue After stirring at rt for 30 min The mixture was stirred at rt for 2 h the solvent was completely removed to give a sticky brown oil After stirring at rt for 30 min the solvent was evaporated to dryness to give a solid The solution was filtered purified by Gilson prep-HPLC [25-50% MeCN—H2O]

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

Procedure: To a 2-dram vial containing tert-butyl 4-{(1R)-1-[(1-benzofuran-2-ylcarbonyl)amino]ethyl}benzoate was added DCM (2.5 mL), and trifluoroacetic acid (0.28 mL, 3.60 mmol). The mixture was stirred at rt for 6 h then evaporated to give an oil residue. To the residue was added HATU (0.10 g, 0.27 mmol), triethylamine (0.25 mL, 1.80 mmol), and DCM (2.5 mL). After stirring at rt for 30 min, O-(tert-butyldimethylsilyl)hydroxylamine (0.053 g, 0.360 mmol) was added. The mixture was stirred at rt for 2 h, then the solvent was completely removed to give a sticky brown oil. To this oil residue was added hydrochloric acid (4.0 mL, 1% v/v in IPA). After stirring at rt for 30 min, the solvent was evaporated to dryness to give a solid. To the solid was then added DMSO (1.1 mL). The solution was filtered and purified by Gilson prep-HPLC [25-50% MeCN—H2O] to give N-((1R)-1-{4-[(hydroxyamino)carbonyl]phenyl}ethyl)-1-benzofuran-2-carboxamide (0.0148 g, 24%) as a white solid. LC-MS: (FA) ES+ 325; 1H NMR (Methanol-d4, 400 MHz) δ 7.71 (m, 3H), 7.60 (d, J=8.5 Hz, 1H), 7.50 (m, 3H), 7.45 (t, J=7.0 Hz, 1H), 7.31 (t, J=7.8 Hz, 1H), 5.30 (q, J=7.2 Hz, 1H), 1.61 (d, J=7.0 Hz, 3H). then evaporated to give an oil residue After stirring at rt for 30 min The mixture was stirred at rt for 2 h the solvent was completely removed to give a sticky brown oil After stirring at rt for 30 min the solvent was evaporated to dryness to give a solid The solution was filtered purified by Gilson prep-HPLC [25-50% MeCN—H2O]

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

Procedure: To the vial containing (R)-4-(1-aminoethyl)benzoic acid hydrochloride from Step 1 was added tert-butyl isocyanate (0.026 mL, 0.23 mmol), N,N dimethylformamide (2.5 mL) and triethylamine (0.21 mL, 1.50 mmol). After the reaction was stirred at rt for 16 h, HATU (0.057 g, 0.150 mmol) in N,N-dimethylformamide (0.5 mL) was added, immediately followed by the addition of O-(tert-butyldimethylsilyl)hydroxylamine (0.0331 g, 0.225 mmol) in DCM (1.0 mL). This mixture was shaken at rt for 1 hr after which it was evaporated to dryness. To the resulting residue was added hydrochloric acid (4 mL, 1% in IPA). After shaking at rt for 30 min, solid NaHCO3 was added to quench excess acid and the solvent was then completely evaporated to dryness to give a solid residue. This solid was dissolved in DMSO (1.2 mL), and the solution was filtered and purified via Gilson prep-HPLC to give the title compound (0.015 g, 35%) as a white solid. LC-MS: (FA) ES+ 286; 1H NMR (Methanol-d4, 300 MHz) δ 7.41 (m, 1H), 6.91 (d, J=4.7 Hz, 1H), 5.03 (q, J=6.8 Hz, 1H), 2.03 (m, 4H), 1.96 (m, 8H), 1.69 (m, 8H), 1.47 (d, J=7.0 Hz, 3H). This mixture was shaken at rt for 1 hr after which it was evaporated to dryness To the resulting residue was added hydrochloric acid (4 mL, 1% in IPA) After shaking at rt for 30 min solid NaHCO3 was added to quench excess acid the solvent was then completely evaporated to dryness to give a solid residue the solution was filtered purified via Gilson prep-HPLC