4-ethyl-4-methylpiperidine

Conditions: temp:70.01; pressure:0.00; stir:

Procedure: Dilution of the aliquot (2 uL) with DMSO (200 uL).

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-ethyl-4-methylpiperidine (0.760 g, 5.98 mmol) and DIEA (2.1 mL, 11.9 mmol) in anhydrous CH3CN (15 mL) was added isopropyl 2-(5-bromo-4-chloro-2,6-dimethylpyridin-3-yl)-2-oxoacetate (2.0 g, 5.98 mmol) at rt. The resulting mixture was placed in a pre-heated oil bath (80° C.) and stirred for 24 h; cooled, diluted with ether, washed with water, brine, and dried (MgSO4). The crude product was charged (DCM) to a 80 g ISCO silica gel cartridge and gradient eluted (5-15% EtOAc/hexanes) using an Isolera chromatography station to give isopropyl 2-(5-bromo-4-(4-ethyl-4-methylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-oxoacetate 2.51 g (99%). 1H NMR (500 MHz, CDCl3) δ 5.07-5.02 (m, 1H), 3.32 (br. s, 2H), 3.18 (br.s, 2H), 2.61 (s, 3H), 2.29 (s, 3H), 1.29-1.28 (m 12H), 0.89 (s, 3H), 0.80 (t, J=7.3 Hz, 3H). UPLC (M+H)=427.3. The resulting mixture was placed in a pre-heated oil bath cooled washed with water, brine dried (MgSO4) The crude product was charged (DCM) to a 80 g ISCO silica gel cartridge and gradient eluted (5-15% EtOAc/hexanes)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-ethyl-4-methylpiperidine (0.760 g, 5.98 mmol) and DIEA (2.1 mL, 11.9 mmol) in anhydrous CH3CN (15 mL) was added isopropyl 2-(5-bromo-4-chloro-2,6-dimethylpyridin-3-yl)-2-oxoacetate (2.0 g, 5.98 mmol) at rt. The resulting mixture was placed in a pre-heated oil bath (80° C.) and stirred for 24 h; cooled, diluted with ether, washed with water, brine, and dried (MgSO4). The crude product was charged (DCM) to a 80 g ISCO silica gel cartridge and gradient eluted (5-15% EtOAc/hexanes) using an Isolera chromatography station to give isopropyl 2-(5-bromo-4-(4-ethyl-4-methylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-oxoacetate 2.51 g (99%). 1H NMR (500 MHz, CDCl3) δ 5.07-5.02 (m, 1H), 3.32 (br. s, 2H), 3.18 (br.s, 2H), 2.61 (s, 3H), 2.29 (s, 3H), 1.29-1.28 (m 12H), 0.89 (s, 3H), 0.80 (t, J=7.3 Hz, 3H). UPLC (M+H)=427.3. The resulting mixture was placed in a pre-heated oil bath cooled washed with water, brine dried (MgSO4) The crude product was charged (DCM) to a 80 g ISCO silica gel cartridge and gradient eluted (5-15% EtOAc/hexanes)

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

Procedure: Proceeding as indicated in example 2 with 0.0734 mole (21.7 g) of 2,4'-dichloro-5-nitro-benzophenone, 0.11 mole (18 g) of 4-ethyl4-methylpiperidine and 0.22 mole (30.4 g) of calcium carbonate in 100 cm3 of N,N-dimethyl acetamide, 16.3 g (Yield: 57%) of the expected product are obtained after re-crystallization in isopropyl ether. M.P.: 105° C.

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-ethyl-4-methylpiperidine (0.760 g, 5.98 mmol) and DIEA (2.1 mL, 11.9 mmol) in anhydrous CH3CN (15 mL) was added isopropyl 2-(5-bromo-4-chloro-2,6-dimethylpyridin-3-yl)-2-oxoacetate (2.0 g, 5.98 mmol) at rt. The resulting mixture was placed in a pre-heated oil bath (80° C.) and stirred for 24 h; cooled, diluted with ether, washed with water, brine, and dried (MgSO4). The crude product was charged (DCM) to a 80 g ISCO silica gel cartridge and gradient eluted (5-15% EtOAc/hexanes) using an Isolera chromatography station to give isopropyl 2-(5-bromo-4-(4-ethyl-4-methylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-oxoacetate 2.51 g (99%). 1H NMR (500 MHz, CDCl3) δ 5.07-5.02 (m, 1H), 3.32 (br. s, 2H), 3.18 (br.s, 2H), 2.61 (s, 3H), 2.29 (s, 3H), 1.29-1.28 (m 12H), 0.89 (s, 3H), 0.80 (t, J=7.3 Hz, 3H). UPLC (M+H)=427.3. The resulting mixture was placed in a pre-heated oil bath cooled washed with water, brine dried (MgSO4) The crude product was charged (DCM) to a 80 g ISCO silica gel cartridge and gradient eluted (5-15% EtOAc/hexanes)