4-iodo-1-phenylbutan-1-one

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

Procedure: When proceeding as described in Example 28, but replacing 3-(p-fluorobenzoyl)propyl iodide (used as the one reactant in said example) by 3-benzoylpropyl iodide and reacting 27.4 g. of said 3-benzoylpropyl iodide with 24.4 g. of 4,4-diphenylpiperidine, on addition of hydrochloric acid to the etheric solution of the diphenylpiperidine base 19.5 g. of 1-(3-benzoylpropyl)-4,4-diphenylpiperidine hydrochloride are obtained. On recrystallization from ethanol, the hydrochloride melts at 200° C.

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

Procedure: When proceeding as described in Example 28, but replacing 3-(p-fluorobenzoyl)propyl iodide (used as the one reactant in said example) by 3-benzoylpropyl iodide and reacting 27.4 g. of said 3-benzoylpropyl iodide with 24.4 g. of 4,4-diphenylpiperidine, on addition of hydrochloric acid to the etheric solution of the diphenylpiperidine base 19.5 g. of 1-(3-benzoylpropyl)-4,4-diphenylpiperidine hydrochloride are obtained. On recrystallization from ethanol, the hydrochloride melts at 200° C.

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

Procedure: tert-Butyl 2-((1-cyclohexyl-4-oxo-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (0.30 g, 0.585 mmol), 4-iodobutyrophenone (0.17 g, 0.585 mmol), and potassium carbonate (0.12 g, 0.878 mmol) in N,N-dimethylformamide (8 mL) were stirred at 65° C. for 2 hours. The reaction was diluted with ethyl acetate, washed with water and brine, dried (MgSO4), and evaporated. The residue was purified by PTLC (5% methanol/dichloromethane) to give product as an oil (0.22 g, 65%); MS for C35H47N3O4 m/z 574 (M+H)+. washed with water and brine dried (MgSO4) evaporated The residue was purified by PTLC (5% methanol/dichloromethane)

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

Procedure: tert-Butyl 2-((1-cyclohexyl-4-oxo-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (0.30 g, 0.585 mmol), 4-iodobutyrophenone (0.17 g, 0.585 mmol), and potassium carbonate (0.12 g, 0.878 mmol) in N,N-dimethylformamide (8 mL) were stirred at 65° C. for 2 hours. The reaction was diluted with ethyl acetate, washed with water and brine, dried (MgSO4), and evaporated. The residue was purified by PTLC (5% methanol/dichloromethane) to give product as an oil (0.22 g, 65%); MS for C35H47N3O4 m/z 574 (M+H)+. washed with water and brine dried (MgSO4) evaporated The residue was purified by PTLC (5% methanol/dichloromethane)

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

Procedure: tert-Butyl 4-(4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)benzoate (0.274 g, 0.672 mmol), 4-iodobutyrophenone (0.18 g, 0.672 mmol), and potassium carbonate (0.14 g, 1.01 mmol) in N,N-dimethylformamide (5 mL) were heated at 65° C. for 3 hours. The reaction was diluted with ethyl acetate, washed with water and brine, dried (MgSO4), and evaporated. The residue was purified by PTLC (5% methanol/dichloromethane) to give product as an oil (0.30 g, 80%); MS for C34H39N3O4 m/z 554 (M+H)+. washed with water and brine dried (MgSO4) evaporated The residue was purified by PTLC (5% methanol/dichloromethane)

Conditions: temp:68.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of tert-butyl 2-(4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)benzoate (370 mg, 0.909 mmol, 1 equiv), 4-iodo-1-phenylbutan-1-one (250 mg, 0.909 mmol, 1 equiv) and potassium carbonate (251 mg, 1.82 mmol, 2 equiv) in N,N-dimethylformamide was stirred at 68° C. for 16 h. After cooling the reaction mixture, the crude mixture was partitioned between ethyl acetate and water. The organic layer was dried over MgSO4, filtered, concentrated, and the crude residue was purified using the Biotage flash chromatography system (SNAP 50 g cartridge, Rf=0.5, gradient—1%-10% methanol in dichloromethane) to afford the title compound as a white powder (410 mg, 82%); 1H NMR (400 MHz, DMSO-d6): δ 1.49 (s, 9H); 1.74-1.83 (m, 4H); 2.37 (t, 2H, J=7.2 Hz); 2.61 (t, 2H, J=10 and 11.2 Hz); 2.726-2.73 (m, 4H); 3.05 (t, 2H, J=6.8 and 7.2 Hz); 5.06 (s, 2H); 6.79 (t, 1H, J=7.2 and 7.6 Hz); 6.87 (s, 1H); 6.89 (s, 1H); 7.20 (m, 2H); 7.46-7.69 (m, 6H); 7.76-7.78 (m, 1H); 7.95-7.99 (m, 2H); MS for C34H39N3O4 m/z 554.3 (M+H)+. After cooling the reaction mixture the crude mixture was partitioned between ethyl acetate and water The organic layer was dried over MgSO4 filtered concentrated the crude residue was purified

Conditions: temp:55.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of methyl 3-(4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)benzoate (0.12 g, 0.33 mmol) and potassium carbonate (0.091 g, 0.66 mmol) in N,N-dimethylformamide (3 mL), was added 4-iodo-1-phenylbutan-1-one (0.09 g, 0.33 mmol). After stirring at 55° C. for 18 hours, the reaction mixture was diluted with ethyl acetate (50 mL), washed with water and brine. The organic phase was dried over MgSO4, filtered, and isolated by Biotage flash chromatography (1-8% methanol/dichloromethane) to obtain the title compound (0.11 g, 65%); 1H NMR (DMSO-d6): δ 1.75 (d, 2H, J=10.8 Hz), 1.83 (t, 2H, J=7.2 Hz), 2.35-2.41 (m, 4H), 2.67-2.74 (m, 4H), 3.04 (t, 2H, J=7.2 Hz), 3.88 (s, 3H), 5.19 (s, 2H), 6.87 (t, 1H, J=7.6 Hz), 7.02 (d, 2H, J=8 Hz), 7.24 (t, 2H, J=8.4 Hz), 7.52 (t, 2H, J=7.2 Hz), 7.57-7.65 (m, 2H), 7.79 (dt, 1H, J=8 and 1.2 Hz), 7.90-7.99 (m, 3H), 8.58 (t, 1H, J=1.6 Hz); MS for C31H33N3O4 m/z 512.3 (M+H)+. washed with water and brine The organic phase was dried over MgSO4 filtered isolated by Biotage flash chromatography (1-8% methanol/dichloromethane)

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

Procedure: tert-Butyl 3-((1-cyclohexyl-4-oxo-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (0.30 g, 0.585 mmol), 4-iodobutyrophenone (0.17 g, 0.585 mmol), and potassium carbonate (0.12 g, 0.878 mmol) in N,N-dimethylformamide (8 mL) were stirred at 65° C. for 2 hours. The reaction was diluted with ethyl acetate, washed with water and brine, dried (MgSO4), and evaporated. The residue was purified by PTLC (5% methanol/dichloromethane) to give product as an oil (0.28 g, 82%); MS for C35H47N3O4 m/z 574 (M+H)+. washed with water and brine dried (MgSO4) evaporated The residue was purified by PTLC (5% methanol/dichloromethane)

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

Procedure: Sodium iodide (1.64 g, 10.95 mmol, 2 equiv) was added to a solution of 4-chloro-1-phenylbutan-1-one (1 g, 5.475 mmol, 1 equiv) in acetone. The reaction mixture was refluxed for 16 h. After cooling to ambient temperature, it was evaporated under reduced pressure to remove all the acetone. The residue was worked up using ethyl acetate and sodium bisulfite, followed by a wash with brine. The organic layer was dried over MgSO4, filtered and concentrated in vacuo. The crude residue was purified using the Biotage falsh chromatography system (SNAP 50 g cartridge, Rf=0.4, 5%-30% ethyl acetate in hexanes) to afford the title compound as white solid (880 mg, 59%). The bottle containing the compound was wrapped in aluminium foil to stored in the freezer to avoid further darkening of the mixture; 1H NMR (400 MHz, DMSO-d6): δ 2.06-2.16 (m, 2H); 3.14 (t, 2H, J=3.2 and 4 Hz); 3.34 (t, 2H, J=6.8 and 7.2 Hz); 7.51-7.55 (m, 2H); 7.62-7.67 (m, 2H); 7.95-7.98 (m, 2H); MS for C10H11IO m/z 274.99 (M+H)+. The reaction mixture was refluxed for 16 h it was evaporated under reduced pressure to remove all the acetone a wash with brine The organic layer was dried over MgSO4 filtered concentrated in vacuo The crude residue was purified

Conditions: temp:68.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of tert-butyl 2-((4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (300 mg, 0.72 mmol, 1 equiv), 4-iodo-1-phenylbutan-1-one (198.5 mg, 0.72 mmol, 1 equiv) and potassium carbonate (199 mg, 1.44 mmol, 2 equiv) in N,N-dimethylformamide was stirred at 68° C. for 16 h. After cooling the reaction mixture, the crude mixture was partitioned between ethyl acetate and water. The organic layer was dried over MgSO4, filtered, concentrated, and the crude residue was purified using the preparative thin layer chromatography in 8% methanol in dichloromethane to afford the title compound (268 mg, 65.5%); MS for C35H41N3O4 m/z 568.31 (M+H)+. After cooling the reaction mixture the crude mixture was partitioned between ethyl acetate and water The organic layer was dried over MgSO4 filtered concentrated the crude residue was purified

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

Procedure: tert-Butyl 2-((1-cyclohexyl-4-oxo-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (0.30 g, 0.585 mmol), 4-iodobutyrophenone (0.17 g, 0.585 mmol), and potassium carbonate (0.12 g, 0.878 mmol) in N,N-dimethylformamide (8 mL) were stirred at 65° C. for 2 hours. The reaction was diluted with ethyl acetate, washed with water and brine, dried (MgSO4), and evaporated. The residue was purified by PTLC (5% methanol/dichloromethane) to give product as an oil (0.22 g, 65%); MS for C35H47N3O4 m/z 574 (M+H)+. washed with water and brine dried (MgSO4) evaporated The residue was purified by PTLC (5% methanol/dichloromethane)

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

Procedure: tert-Butyl 4-(4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)benzoate (0.274 g, 0.672 mmol), 4-iodobutyrophenone (0.18 g, 0.672 mmol), and potassium carbonate (0.14 g, 1.01 mmol) in N,N-dimethylformamide (5 mL) were heated at 65° C. for 3 hours. The reaction was diluted with ethyl acetate, washed with water and brine, dried (MgSO4), and evaporated. The residue was purified by PTLC (5% methanol/dichloromethane) to give product as an oil (0.30 g, 80%); MS for C34H39N3O4 m/z 554 (M+H)+. washed with water and brine dried (MgSO4) evaporated The residue was purified by PTLC (5% methanol/dichloromethane)