methyl 2-(dimethylamino)acetate

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

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

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

Procedure: Molecular sieves (4 Å, powdered, 200 mg) were added to a suspension of 1-(cyclohexyl)methyl-N-hydroxy-7-methoxy-1H-indole-3-carboxamidine (250 mg, 0.829 mmol) in tetrahydrofuran (6 ml) under nitrogen, and the mixture was stirred at room temperature for 30 min. Sodium hydride (60% suspension in oil, 36 mg, 0.900 mmol) was added, then the resulting mixture was stirred at 60° C. for 20 min. The reaction mixture was cooled to room temperature and N,N-dimethylglycine methyl ester (194 mg, 1.66 mmol) was added to the mixture. The resulting mixture was stirred at reflux temperature for 2 h and then concentrated in vacuo. The obtained residue was mixed with dichloromethane (200 ml), washed with 5% aqueous sodium carbonate, dried over magnesium sulfate and concentrated in vacuo. The obtained oil was purified by flash column chromatography eluting with 0.6% (v/v) methanol in dichloromethane to afford an oil. This oil was dissolved in isopropanol (3 ml), then hydrogen chloride (1M solution in diethyl ether; 3 ml) was added to the solution. The resulting mixture was concentrated in vacuo to afford the title compound (1:1 hydrochloride salt) (66 mg). the resulting mixture was stirred at 60° C. for 20 min The reaction mixture was cooled to room temperature The resulting mixture was stirred at reflux temperature for 2 h concentrated in vacuo The obtained residue was mixed with dichloromethane (200 ml) washed with 5% aqueous sodium carbonate dried over magnesium sulfate concentrated in vacuo The obtained oil was purified by flash column chromatography eluting with 0.6% (v/v) methanol in dichloromethane to afford an oil The resulting mixture was concentrated in vacuo

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

Procedure: The process is carried out as in Example 80 above, with the compound from preparation 1.10E, 6-acetyl-3-(2,4-dichlorophenyl)-1,9-dimethyl-1,9-dihydro-2H-pyrido[2,3-b]indol-2-one and dimethylglycine methyl ester.

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

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

Procedure: A dry 1 L round bottomed flask was charged with anhydrous Et2O (500 mL) and cooled to 0° C. (ice-water bath). After having been rinsed with hexane, NaH (60% w/w suspension in mineral oil, 16 g, 400 mmol, 2 eq, weight before rinsing) was added followed by absolute EtOH (23.2 mL, 400 moles, 2 eq). After 10 minutes, a mixture of 3-pyridine carboxaldehyde (18.8 mL, 200 mmol, 1 eq) and N,N-dimethyl glycine ethyl ester (84.8 mL, 3 eq) (N,N-dimethyl glycine methyl ester also performs satisfactorily in this preparation) was added during 1 minute. This mixture was as stirred overnight at room temperature, heated at 30° C. for 1 h, and then transferred to a 2 L separation funnel. The mixture was diluted with EtOAc (500 mL) and H20 (500 mL) and the organic phase was transferred to a beaker and stirred with 1N HCl (500 mL) at room temperature for 10 minutes. The mixture was checked to confirm a pH=1 and then the phases were separated. The aqueous layer was retained and slowly neutralized by the addition of solid NaHCO3. This solution was extracted with EtOAc (3×300 mL), the combined extracts dried (Na2SO4), filtered and concentrated to a yellow solid. Crystallization from EtOAc-Hexanes (4:1) provided 20.0 g (52% yield) of pale yellow 8. RP-HPLC Method 2-100% B. was added also performs satisfactorily in this preparation) was added during 1 minute heated at 30° C. for 1 h transferred to a 2 L separation funnel The mixture was diluted with EtOAc (500 mL) and H20 (500 mL) stirred with 1N HCl (500 mL) at room temperature for 10 minutes the phases were separated slowly neutralized by the addition of solid NaHCO3 This solution was extracted with EtOAc (3×300 mL) the combined extracts dried (Na2SO4) filtered concentrated to a yellow solid Crystallization from EtOAc-Hexanes (4:1) provided 20.0 g (52% yield) of pale yellow 8

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

Procedure: Molecular sieves (4 Å, powdered, 200 mg) were added to a suspension of 1-(cyclohexyl)methyl-N-hydroxy-7-methoxy-1H-indole-3-carboxamidine (250 mg, 0.829 mmol) in tetrahydrofuran (6 ml) under nitrogen, and the mixture was stirred at room temperature for 30 min. Sodium hydride (60% suspension in oil, 36 mg, 0.900 mmol) was added, then the resulting mixture was stirred at 60° C. for 20 min. The reaction mixture was cooled to room temperature and N,N-dimethylglycine methyl ester (194 mg, 1.66 mmol) was added to the mixture. The resulting mixture was stirred at reflux temperature for 2 h and then concentrated in vacuo. The obtained residue was mixed with dichloromethane (200 ml), washed with 5% aqueous sodium carbonate, dried over magnesium sulfate and concentrated in vacuo. The obtained oil was purified by flash column chromatography eluting with 0.6% (v/v) methanol in dichloromethane to afford an oil. This oil was dissolved in isopropanol (3 ml), then hydrogen chloride (1M solution in diethyl ether; 3 ml) was added to the solution. The resulting mixture was concentrated in vacuo to afford the title compound (1:1 hydrochloride salt) (66 mg). the resulting mixture was stirred at 60° C. for 20 min The reaction mixture was cooled to room temperature The resulting mixture was stirred at reflux temperature for 2 h concentrated in vacuo The obtained residue was mixed with dichloromethane (200 ml) washed with 5% aqueous sodium carbonate dried over magnesium sulfate concentrated in vacuo The obtained oil was purified by flash column chromatography eluting with 0.6% (v/v) methanol in dichloromethane to afford an oil The resulting mixture was concentrated in vacuo

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

Procedure: The process is carried out as in Example 80 above, with the compound from preparation 1.10E, 6-acetyl-3-(2,4-dichlorophenyl)-1,9-dimethyl-1,9-dihydro-2H-pyrido[2,3-b]indol-2-one and dimethylglycine methyl ester.