Tetraethylammonium fluoride hydrate

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

Procedure: 4-(3-(tert-Butyldimethylsilyloxy)-α-hydroxybenzyl)-N,N-diethylbenzamide (Example 1, infra) was treated with thionyl chloride and trans-2,5-dimethylpiperazine as described in Example 5. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1). The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile and treated with tetraethylammonium fluoride hydrate (0.6 g, 4.0 mmol) as in Example 7 to give 0.46 g of (±)-N,N-diethyl-4-((αR*)-3-hydroxy-α-((2R*, 5S*)-2,5-dimethyl-1-piperazinyl)benzyl)benzamide as a white solid, mp 175-177° C. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1) The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile

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

Procedure: A mixture of Example 609A (23 mg, 0.033 mmol) in 1:1 MeOH:dioxane (2 mL) was treated with tetraethylammonium fluoride hydrate (49.4 mg, 0.33 mmol) at 50° C. for 24 hours. The reaction was then cooled to room temperature, concentrated, diluted with ethyl acetate, washed with water and brine, dried (MgSO4), filtered and concentrated. The residue was purified by preparative HPLC to provide the title compound. MS (ESI) m/e 582 (M+H)+; 1H NMR (300 MHz, DMSO-d6) □ 9.75 (s, 1H), 7.84 (s, 1H), 7.72 (d, J=8.1 Hz, 1H), 7.25 (d, J=1.4 Hz, 1H), 7.15-7.20 (m, 3H), 7.07 (m, 1H), 6.80-6.96 (m, 7H), 4.00-4.06 (m, 4H), 3.85 (s, 3H), 3.70-3.75 (m, 6H), 2.96-2.99 (m, 4H), 2.86 (t, J=6.4 Hz, 2H). concentrated diluted with ethyl acetate washed with water and brine dried (MgSO4) filtered concentrated The residue was purified by preparative HPLC

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

Procedure: A mixture of Example 609A (23 mg, 0.033 mmol) in 1:1 MeOH:dioxane (2 mL) was treated with tetraethylammonium fluoride hydrate (49.4 mg, 0.33 mmol) at 50° C. for 24 hours. The reaction was then cooled to room temperature, concentrated, diluted with ethyl acetate, washed with water and brine, dried (MgSO4), filtered and concentrated. The residue was purified by preparative HPLC to provide the title compound. MS (ESI) m/e 582 (M+H)+; 1H NMR (300 MHz, DMSO-d6) □ 9.75 (s, 1H), 7.84 (s, 1H), 7.72 (d, J=8.1 Hz, 1H), 7.25 (d, J=1.4 Hz, 1H), 7.15-7.20 (m, 3H), 7.07 (m, 1H), 6.80-6.96 (m, 7H), 4.00-4.06 (m, 4H), 3.85 (s, 3H), 3.70-3.75 (m, 6H), 2.96-2.99 (m, 4H), 2.86 (t, J=6.4 Hz, 2H). concentrated diluted with ethyl acetate washed with water and brine dried (MgSO4) filtered concentrated The residue was purified by preparative HPLC

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

Procedure: A mixture of Example 500A, Et4NF.H2O (10 equiv.) and THF was heated overnight at 65° C., concentrated under vacuum, diluted with ethyl acetate, washed with water and brine, dried (MgSO4), filtered and concentrated under vacuum. The residue was purified by preparative HPLC to provide 50 mg (28%) of the desired product. MS (ESI) m/e 480 (M+H)+; 1H NMR (400 MHz, DMSO-d6) □ 9.63 (s, 1H), 8.01 (d, J=8.6 Hz, 1H), 7.78 (d, J=8.3 Hz, 1H), 7.71 (s, 1H), 7.53 (d, J=1.2 Hz, 1H), 7.35 (dd, J=1.5, 8.6 Hz, 1H), 7.28-7.30 (m, 2H), 6.70 (s, 1H), 6.65 (s, 1H), 4.03 (s, 3H), 3.89 (t, J=6.6 Hz, 2H), 3.67 (s, 3H), 3.44 (t, J=6.4 Hz, 2H), 1.69-1.76 (m, 2H), 1.51-1.58 (m, 2H). concentrated under vacuum diluted with ethyl acetate washed with water and brine dried (MgSO4) filtered concentrated under vacuum The residue was purified by preparative HPLC

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

Procedure: A mixture of Example 500A, Et4NF.H2O (10 equiv.) and THF was heated overnight at 65° C., concentrated under vacuum, diluted with ethyl acetate, washed with water and brine, dried (MgSO4), filtered and concentrated under vacuum. The residue was purified by preparative HPLC to provide 50 mg (28%) of the desired product. MS (ESI) m/e 480 (M+H)+; 1H NMR (400 MHz, DMSO-d6) □ 9.63 (s, 1H), 8.01 (d, J=8.6 Hz, 1H), 7.78 (d, J=8.3 Hz, 1H), 7.71 (s, 1H), 7.53 (d, J=1.2 Hz, 1H), 7.35 (dd, J=1.5, 8.6 Hz, 1H), 7.28-7.30 (m, 2H), 6.70 (s, 1H), 6.65 (s, 1H), 4.03 (s, 3H), 3.89 (t, J=6.6 Hz, 2H), 3.67 (s, 3H), 3.44 (t, J=6.4 Hz, 2H), 1.69-1.76 (m, 2H), 1.51-1.58 (m, 2H). concentrated under vacuum diluted with ethyl acetate washed with water and brine dried (MgSO4) filtered concentrated under vacuum The residue was purified by preparative HPLC

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

Procedure: 4-(3-(tert-Butyldimethylsilyloxy)-α-hydroxybenzyl)-N,N-diethylbenzamide (Example 1, infra) was treated with thionyl chloride and trans-2,5-dimethylpiperazine as described in Example 5. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1). The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile and treated with tetraethylammonium fluoride hydrate (0.6 g, 4.0 mmol) as in Example 7 to give 0.46 g of (±)-N,N-diethyl-4-((αR*)-3-hydroxy-α-((2R*,5S*)-2,5-dimethyl-1-piperazinyl)benzyl)benzamide as a white solid, mp 175-177° C. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1) The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile

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

Procedure: 4-(3-(tert-Butyldimethylsilyloxy)-α-hydroxybenzyl)-N,N-diethylbenzamide (Example 1, infra) was treated with thionyl chloride and trans-2,5-dimethylpiperazine as described in Example 5. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1). The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile and treated with tetraethylammonium fluoride hydrate (0.6 g, 4.0 mmol) as in Example 7 to give 0.46 g of (±)-N,N-diethyl-4-((αR*)-3-hydroxy-α-((2R*,5S*)-2,5-dimethyl-1-piperazinyl)benzyl)benzamide as a white solid, mp 175-177° C. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1) The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile

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

Procedure: To a solution of (S)-tert-butyl 4-((R)-2-((tert-butyldimethylsilyloxy)methyl)-5-(methylsulfonyloxy)pentyl)-2,2-dimethyloxazolidine-3-carboxylate (37.7 g, 74.2 mmol) in THF (1000 mL) was added tetraethylammonium fluoride hydrate (41 g, 185.5 mmol) in portions. The reaction mixture was stirred under reflux overnight. The mixture was diluted with EtOAc (1000 mL), washed with water (300 mL) and brine (500 mL). The organic phase was dried over Na2SO4, filtered and concentrated in vacuo to give the crude product, which was purified by column chromatography to afford (S)-tert-butyl 2,2-dimethyl-4-(((R)-tetrahydro-2H-pyran-3-yl)methyl)oxazolidine-3-carboxylate (12.0 g, 54%). under reflux overnight washed with water (300 mL) and brine (500 mL) The organic phase was dried over Na2SO4 filtered concentrated in vacuo to give the crude product, which was purified by column chromatography

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

Procedure: To a solution of (S)-tert-butyl 4-((R)-2-((tert-butyldimethylsilyloxy)methyl)-5-(methylsulfonyloxy)pentyl)-2,2-dimethyloxazolidine-3-carboxylate (37.7 g, 74.2 mmol) in THF (1000 mL) was added tetraethylammonium fluoride hydrate (41 g, 185.5 mmol) in portions. The reaction mixture was stirred under reflux overnight. The mixture was diluted with EtOAc (1000 mL), washed with water (300 mL) and brine (500 mL). The organic phase was dried over Na2SO4, filtered and concentrated in vacuo to give the crude product, which was purified by column chromatography to afford (S)-tert-butyl 2,2-dimethyl-4-(((R)-tetrahydro-2H-pyran-3-yl)methyl)oxazolidine-3-carboxylate (12.0 g, 54%). under reflux overnight washed with water (300 mL) and brine (500 mL) The organic phase was dried over Na2SO4 filtered concentrated in vacuo to give the crude product, which was purified by column chromatography

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

Procedure: 4-(3-(tert-Butyldimethylsilyloxy)-α-hydroxybenzyl)-N,N-diethylbenzamide (Example 1, infra) was treated with thionyl chloride and trans-2,5-dimethylpiperazine as described in Example 5. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1). The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile and treated with tetraethylammonium fluoride hydrate (0.6 g, 4.0 mmol) as in Example 7 to give 0.46 g of (±)-N,N-diethyl-4-((αR*)-3-hydroxy-α-((2R*, 5S*)-2,5-dimethyl-1-piperazinyl)benzyl)benzamide as a white solid, mp 175-177° C. The crude mixture of diastereomers was purified by chromatography on silica gel (Waters Prep 500) with dichloromethane:ethanol:triethylamine (100:0.25:0.1) The less mobile isomer (1.28 g, 2.5 mmol) was dissolved in acetonitrile

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

Procedure: A mixture of Example 609A (23 mg, 0.033 mmol) in 1:1 MeOH:dioxane (2 mL) was treated with tetraethylammonium fluoride hydrate (49.4 mg, 0.33 mmol) at 50° C. for 24 hours. The reaction was then cooled to room temperature, concentrated, diluted with ethyl acetate, washed with water and brine, dried (MgSO4), filtered and concentrated. The residue was purified by preparative HPLC to provide the title compound. MS (ESI) m/e 582 (M+H)+; 1H NMR (300 MHz, DMSO-d6) □ 9.75 (s, 1H), 7.84 (s, 1H), 7.72 (d, J=8.1 Hz, 1H), 7.25 (d, J=1.4 Hz, 1H), 7.15-7.20 (m, 3H), 7.07 (m, 1H), 6.80-6.96 (m, 7H), 4.00-4.06 (m, 4H), 3.85 (s, 3H), 3.70-3.75 (m, 6H), 2.96-2.99 (m, 4H), 2.86 (t, J=6.4 Hz, 2H). concentrated diluted with ethyl acetate washed with water and brine dried (MgSO4) filtered concentrated The residue was purified by preparative HPLC

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

Procedure: A mixture of Example 500A, Et4NF.H2O (10 equiv.) and THF was heated overnight at 65° C., concentrated under vacuum, diluted with ethyl acetate, washed with water and brine, dried (MgSO4), filtered and concentrated under vacuum. The residue was purified by preparative HPLC to provide 50 mg (28%) of the desired product. MS (ESI) m/e 480 (M+H)+; 1H NMR (400 MHz, DMSO-d6) □ 9.63 (s, 1H), 8.01 (d, J=8.6 Hz, 1H), 7.78 (d, J=8.3 Hz, 1H), 7.71 (s, 1H), 7.53 (d, J=1.2 Hz, 1H), 7.35 (dd, J=1.5, 8.6 Hz, 1H), 7.28-7.30 (m, 2H), 6.70 (s, 1H), 6.65 (s, 1H), 4.03 (s, 3H), 3.89 (t, J=6.6 Hz, 2H), 3.67 (s, 3H), 3.44 (t, J=6.4 Hz, 2H), 1.69-1.76 (m, 2H), 1.51-1.58 (m, 2H). concentrated under vacuum diluted with ethyl acetate washed with water and brine dried (MgSO4) filtered concentrated under vacuum The residue was purified by preparative HPLC