tert-butyl 2-[(4R,6R)-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate

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

Procedure: A solution of (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate, 2.56 g (9.36 mol), and (±)-4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N,β-diphenylbenzenebutaneamide mixture of R-(R*,R*)], [R-(R*,S*)], [S-(R*,R*)]and [S-(R*,S*)]isomers, 3.00 g (7.20 mol), in 60 mL of heptane:toluene (9:1) is heated at reflux for 24 hours. The solution is cooled and poured into 300 mL of tetrahydrofuran and 150 mL of saturated ammonium chloride in water. The layers are separated and the organic layer is added to 15 mL of 10% hydrochloric acid solution and the solution is stirred for 15 hours. To this solution is added sodium hydroxide (3.6 g) and the mixture is stirred for 30 hours. The reaction is stopped by adding 150 mL of water, 90 mL of hexane, and separating the layers. The aqueous layer is acidified with dilute hydrochloric acid solution, stirred for three hours and extracted with 150 mL of ethyl acetate. A drop of concentrated hydrochloric acid is added to the ethyl acetate solution and the solution is allowed to stand 18 hours. The solution is concentrated in vacuo and the concentrate is redissolved in 50 mL of ethyl acetate and treated with one drop of concentrated hydrochloric acid. The solution is stirred two hours, concentrated in vacuo, and dissolved in 3.0 mL of toluene. (2R-trans)-5-(4-fluorophenyl)-2(1-methylethyl)-N,4-diphenyl-1-[2-(tetrahydro-4hydroxy-6-oxo-2H-pyran-2-yl)-ethyl]-1H-pyrrole-3carboxamide (2.92 g) is isolated in two crops. at reflux for 24 hours The solution is cooled The layers are separated the organic layer is added to 15 mL of 10% hydrochloric acid solution To this solution is added sodium hydroxide (3.6 g) the mixture is stirred for 30 hours by adding 150 mL of water, 90 mL of hexane separating the layers stirred for three hours extracted with 150 mL of ethyl acetate A drop of concentrated hydrochloric acid is added to the ethyl acetate solution to stand 18 hours The solution is concentrated in vacuo the concentrate is redissolved in 50 mL of ethyl acetate treated with one drop of concentrated hydrochloric acid The solution is stirred two hours concentrated in vacuo dissolved in 3.0 mL of toluene

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate, 1.36 % (4.97 mol), and (±)-4-fluoro-a-[2-methyl-1-oxopropyl ]-γ-oxo-N,β--diphenylbenzenebutaneamide mixture of [R-(R',R')], [R-(R',S')], [S-(R',R')]and [S-R',S')]isomers, 1.60 g (3.83 mol), in 50 mL of heptane:toluene (9:1) is heated at reflux for 24 hours. The solution is cooled slightly and 15 mL of 2-propanol added. The mixture is allowed to cool to 25° C. and filtered to give 1.86 g of (R-cis)-1,1dimethylethyl 6-[2[2-(4-fluorophenyl)-5-(1-methyl-ethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1yl]ethyl]-2,2-dimethyl-1,3-dioxane-4-acetate as a yellow solid with acceptable PNMR & C-NMR spectra. at reflux for 24 hours The solution is cooled slightly filtered

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

Procedure: A solution of (4R-cis)-1,1-dimethylethyl 6-cyanomethyl-2,2-dimethyl-1,3-dioxane-4 -acetate, 5.63 g (0.048 mol), in 100 mL of methanol saturated with gaseous ammonia is treated with 0.5 g of Raney nickel #30 and hydrogen gas in a shaker at 50 psi and 40 ° C. After 16 hours, thin layer chromatography indicates no starting nitrile present. The suspension is cooled, filtered through filter aid, and concentrated to an oil. This crude oil is purified by flash chromatography on silica gel with 30:20:1 (ethyl acetate:methanol:ammonium hydroxide) as eluent to give 4.93 g of (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate (98.2 area %) as a clear oil with acceptable IR, NMR, C-NMR and MS spectra. The suspension is cooled filtered through filter aid concentrated to an oil This crude oil is purified by flash chromatography on silica gel with 30:20:1 (ethyl acetate:methanol:ammonium hydroxide) as eluent

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (4R-cis)-1,1dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate, (Example 2) 1.36 g (4.97 mmol), and (±)-4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N,β-diphenylbenzenebutaneamide mixture of [R-(R*,R*)], [R-(R*,S*)], [S-(R*,R*)], and [S-R*,R*)] isomers, (Example 3) 1.60 g (3.83 mmol), in 50 mL of heptane:toluene (9:1) is heated at reflux for 24 hours. The solution is cooled slightly and 15 mL of 2-propanol added. The mixture is allowed to cool to 25° C. and filtered to give 1.86 g of (4R-cis)-1,1-dimethylethyl 6-[2[2-(4fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl] ethyl]-2,2-dimethyl-1,3-dioxane-4-acetate as a yellow solid. at reflux for 24 hours The solution is cooled slightly filtered

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

Procedure: A solution of (4R-cis)-1,1-dimethylethyl 6-cyanomethyl-2,2-dimethyl-1,3-dioxane-4-acetate, (Example 1) 5.63 g (0.048 mol), in 100 mL of methanol saturated with gaseous ammonia is treated with 0.5 g of Raney nickel 190 30 and hydrogen gas in a shaker at 50 pounds per square inch (psi) and 40° C. After 16 hours, thin layer chromatography indicates no starting nitrile present. The suspension is cooled, filtered through filter aid, and concentrated to an oil. This crude oil is purified by flash chromatography on silica gel with 30:20:1 (ethyl acetate:methanol:ammonium hydroxide) as eluant to give 4.93 g of (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)- 2,2-dimethyl-1,3-dioxane-4-acetate (98.2 area %) as a clear oil. The suspension is cooled filtered through filter aid concentrated to an oil This crude oil is purified by flash chromatography on silica gel with 30:20:1 (ethyl acetate:methanol:ammonium hydroxide) as eluant

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

Procedure: A solution of (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate, 2.56 g (9.36 mol), and (±)-4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N,β-diphenylbenzenebutaneamide mixture of [R-(R*,R*)], [R-(R*,S*)], [S-(R*,R*)] and [S-(R*,S*)] isomers, 3.00 g (7.20 mol), in 60 mL of heptane:toluene (9:1) is heated at reflux for 24 hours. The solution is cooled and poured into 300 mL of tetrahydrofuran and 150 mL of saturated ammonium chloride in water. The layers are separated and the organic layer is added to 15 mL of 10% hydrochloric acid solution and the solution is stirred for 15 hours. To this solution is added sodium hydroxide (3.6 g) and the mixture is stirred for 30 hours. The reaction is stopped by adding 150 mL of water, 90 mL of hexane, and separating the layers. The aqueous layer is acidified with dilute hydrochloric acid solution, stirred for three hours and extracted with 150 mL of ethyl acetate. A drop of concentrated hydrochloric acid is added to the ethyl acetate solution and the solution is allowed to stand 18 hours. The solution is concentrated in vacuo and the concentrate is redissolved in 50 mL of ethyl acetate and treated with one drop of concentrated hydrochloric acid. The solution is stirred two hours, concentrated in vacuo, and dissolved in 3.0 mL of toluene. (2R-trans)-5-(4-fluorophenyl)-2-(1-methylethyl)-N,4-diphenyl-1-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)-ethyl]-1H-pyrrole-3-carboxamide (2.92 g) is isolated in two crops. at reflux for 24 hours The solution is cooled The layers are separated the organic layer is added to 15 mL of 10% hydrochloric acid solution To this solution is added sodium hydroxide (3.6 g) the mixture is stirred for 30 hours by adding 150 mL of water, 90 mL of hexane separating the layers stirred for three hours extracted with 150 mL of ethyl acetate A drop of concentrated hydrochloric acid is added to the ethyl acetate solution to stand 18 hours The solution is concentrated in vacuo the concentrate is redissolved in 50 mL of ethyl acetate treated with one drop of concentrated hydrochloric acid The solution is stirred two hours concentrated in vacuo dissolved in 3.0 mL of toluene

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

Procedure: A solution of 0.79 g (2.89 mmol) of (±)-cis-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate and 1.00 g (2.41 mmol) of (±)-4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N,β-diphenylbenzenebutaneamide mixture of ~R-(R*,R*)], [R-(R*,S*)], [S-(R*,R*)] and [S-(R*,S*)] isomers in 15 mL of heptane:toluene (9:1) is heated at reflux for 24 hours. The solution is cooled and poured into 100 mL of tetrahydrofuran and 50 mL of saturated ammonium chloride in water. The layers are separated and the organic layer washed with brine. To the organic layer is added 5 mL of 10% hydrochloric acid solution and the solution is stirred for 15 hours. To this solution is added 1.2 g of sodium hydroxide and the mixture is stirred for 30 hours. The reaction is stopped by adding 50 mL of water, 30 mL of hexane, and separating the layers. The aqueous layer is acidified with dilute hydrochloric acid solution, stirred for three hours and extracted with 50 mL of ethyl acetate. A drop of concentrated hydrochloric acid is added to the ethyl acetate solution and the solution is allowed to stand 18 hours. The solution is concentrated in vacuo and the concentrate is redissolved in 50 mL of ethyl acetate and treated with one drop of concentrated hydrochloric acid. The solution is stirred two hours, concentrated in vacuo, and dissolved in 10 mL of toluene. Trans-(±)-5-(4-fluorophenyl)-2-(1-methyl-ethyl)-N,4-diphenyl-1-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-1H-pyrrole-3-carboxamide is isolated in two crops. is heated at reflux for 24 hours The solution is cooled The layers are separated the organic layer washed with brine To the organic layer is added 5 mL of 10% hydrochloric acid solution To this solution is added 1.2 g of sodium hydroxide the mixture is stirred for 30 hours by adding 50 mL of water, 30 mL of hexane separating the layers stirred for three hours extracted with 50 mL of ethyl acetate A drop of concentrated hydrochloric acid is added to the ethyl acetate solution to stand 18 hours The solution is concentrated in vacuo the concentrate is redissolved in 50 mL of ethyl acetate treated with one drop of concentrated hydrochloric acid The solution is stirred two hours concentrated in vacuo dissolved in 10 mL of toluene

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

Procedure: A solution of 0.79 g (2.89 mmol) of (±)-cis-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate and 1.00 g (2.41 mmol) of (±)-4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N,β-diphenylbenzenebutaneamide mixture of ~R-(R*,R*)], [R-(R*,S*)], [S-(R*,R*)] and [S-(R*,S*)] isomers in 15 mL of heptane:toluene (9:1) is heated at reflux for 24 hours. The solution is cooled and poured into 100 mL of tetrahydrofuran and 50 mL of saturated ammonium chloride in water. The layers are separated and the organic layer washed with brine. To the organic layer is added 5 mL of 10% hydrochloric acid solution and the solution is stirred for 15 hours. To this solution is added 1.2 g of sodium hydroxide and the mixture is stirred for 30 hours. The reaction is stopped by adding 50 mL of water, 30 mL of hexane, and separating the layers. The aqueous layer is acidified with dilute hydrochloric acid solution, stirred for three hours and extracted with 50 mL of ethyl acetate. A drop of concentrated hydrochloric acid is added to the ethyl acetate solution and the solution is allowed to stand 18 hours. The solution is concentrated in vacuo and the concentrate is redissolved in 50 mL of ethyl acetate and treated with one drop of concentrated hydrochloric acid. The solution is stirred two hours, concentrated in vacuo, and dissolved in 10 mL of toluene. Trans-(±)-5-(4-fluorophenyl)-2-(1-methyl-ethyl)-N,4-diphenyl-1-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-1H-pyrrole-3-carboxamide is isolated in two crops. is heated at reflux for 24 hours The solution is cooled The layers are separated the organic layer washed with brine To the organic layer is added 5 mL of 10% hydrochloric acid solution To this solution is added 1.2 g of sodium hydroxide the mixture is stirred for 30 hours by adding 50 mL of water, 30 mL of hexane separating the layers stirred for three hours extracted with 50 mL of ethyl acetate A drop of concentrated hydrochloric acid is added to the ethyl acetate solution to stand 18 hours The solution is concentrated in vacuo the concentrate is redissolved in 50 mL of ethyl acetate treated with one drop of concentrated hydrochloric acid The solution is stirred two hours concentrated in vacuo dissolved in 10 mL of toluene

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (4R-cis)-1,1-dimethylethyl 6-cyanomethyl-2,2-dimethyl-1,3-dioxane-4-acetate (Example 5), 8.2 kg (30.5 mol) in 100 L of methanol containing 15 kg of anhydrous ammonia was reacted with hydrogen gas under 50 pounds per square inch (psi) at 30° C. in the presence of a slurry of 8 kg of Raney nickel doped with 1% molybdenum. After 6 hours, uptake of hydrogen had ceased, the mixture was cooled to 20° C., the atmosphere was vented and exchanged for nitrogen, and the slurry was filtered, concentrated by distillation and distilled under vacuum to give 7.8 kg of 96% pure (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate as a clear oil; bp 125-135° C. at 0.5 mm Hg. the slurry was filtered concentrated by distillation distilled under vacuum

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (4R-cis)-1,1 dimethylethyl 6-cyanomethyl-2,2-dimethyl-1,3-dioxane-4-acetate (Example 2), 8.2 kg (30.5 mol) in 100 L of methanol containing 15 kg of anhydrous ammonia is reacted with hydrogen gas under 50 pounds per square inch (psi) at 30° C. in the presence of a slurry of 8 kg of Raney nickel doped with 1% molybdenum. After 6 hours, uptake of hydrogen has ceased, the mixture is cooled to 20° C., the atmosphere is vented and exchanged for nitrogen, and the slurry is filtered, concentrated by distillation and distilled under vacuum to give 7.8 kg of 96% pure (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate as a clear oil; bp 125°-135° C. @0.5 mm Hg. 200 MHz 1H-NMR (CDCl3) 1.0-1.2 (m, 1H), 1.22 (s, 3H), 1.31 (s, 12H), 1.35-1.45 (m, 3H), 2.15 (dd, 1H, J=15.1 Hz, J=6.2 Hz), 2.29 (dd, 1H, J=15.1Hz, J=7.0 Hz), 2.66 (t, 2H, J=6.6 Hz), 3.82 (m, 1H), 4.12 (m, 1H). the slurry is filtered concentrated by distillation distilled under vacuum

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (4R-cis)-1,1 dimethylethyl 6-cyanomethyl-2,2-dimethyl-1,3-dioxane-4-acetate (Example 2), 8.2 kg (30.5 mol) in 100 L of methanol containing 15 kg of anhydrous ammonia is reacted with hydrogen gas under 50 pounds per square inch (psi) at 30° C. in the presence of a slurry of 8 kg of Raney nickel doped with 1% molybdenum. After 6 hours, uptake of hydrogen has ceased, the mixture is cooled to 20° C., the atmosphere is vented and exchanged for nitrogen, and the slurry is filtered, concentrated by distillation and distilled under vacuum to give 7.8 kg of 96% pure (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate as a clear oil; bp 125°-135° C. @0.5 mm Hg. 200 MHz 1H-NMR (CDCl3) 1.0-1.2 (m, 1H), 1.22 (s, 3H), 1.31 (s, 12H), 1.35-1.45 (m, 3H), 2.15 (dd, 1H, J=15.1 Hz, J=6.2 Hz), 2.29 (dd, 1H, J=15.1Hz, J=7.0 Hz), 2.66 (t, 2H, J=6.6 Hz), 3.82 (m, 1H), 4.12 (m, 1H). the slurry is filtered concentrated by distillation distilled under vacuum

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (4R-cis)-1,1-dimethylethyl 6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetate, 1.36 % (4.97 mol), and (±)-4-fluoro-a-[2-methyl-1-oxopropyl ]-γ-oxo-N,β--diphenylbenzenebutaneamide mixture of [R-(R',R')], [R-(R',S')], [S-(R',R')]and [S-R',S')]isomers, 1.60 g (3.83 mol), in 50 mL of heptane:toluene (9:1) is heated at reflux for 24 hours. The solution is cooled slightly and 15 mL of 2-propanol added. The mixture is allowed to cool to 25° C. and filtered to give 1.86 g of (R-cis)-1,1dimethylethyl 6-[2[2-(4-fluorophenyl)-5-(1-methyl-ethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1yl]ethyl]-2,2-dimethyl-1,3-dioxane-4-acetate as a yellow solid with acceptable PNMR & C-NMR spectra. at reflux for 24 hours The solution is cooled slightly filtered