Methanol → 4-chloro-N-ethyl-2-methoxy-5-methyl-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-3-amine

HRID 597941Notes

Reaction equation

HRID 597941 reaction equation
[Cl:1][C:2]1[C:12]2[CH:11]([CH3:13])[CH2:10][N:9](C(=O)C(F)(F)F)[CH2:8][CH2:7][C:6]=2[N:5]=[C:4]([O:20][CH3:21])[C:3]=1[NH:22][CH2:23][CH3:24].C([O-])([O-])=O.[K+].[K+].CO>O>[Cl:1][C:2]1[C:12]2[CH:11]([CH3:13])[CH2:10][NH:9][CH2:8][CH2:7][C:6]=2[N:5]=[C:4]([O:20][CH3:21])[C:3]=1[NH:22][CH2:23][CH3:24]

Participants

5

Reactant 3

HCID 887MethanolHCID 11430Potassium CarbonateHCID 236543744-chloro-N-ethyl-2-methoxy-5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-3-amine

Product 1

HCID 236539114-chloro-N-ethyl-2-methoxy-5-methyl-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-3-amineYield 100.1%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a solution of N-ethyl-2-methoxy-5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-3-amine (99.0 mg, 0.30 mmol) in MeCN (5 ml) was added NCS (44.0 mg, 0.33 mmol) at room temperature and the mixture was refluxed for 30 minutes. The reaction was quenched with excess of sat. aq. NaHCO3 and extracted with EtOAc. The organic layer was dried over Na2SO4, concentrated in vacuo and purified by column chromatography to give 40 mg (36%) of 4-chloro-N-ethyl-2-methoxy-5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-3-amine. 1H-NMR (CDCl3) δ 4.39 (0.5H), 4.04 (0.5H), 3.94 (3H), 3.83 (1H), 3.78 (1H), 3.72 (1H), 3.45 (1H), 3.35 (2H), 3.25 (1H), 3.09 (1H), 1.19 (6H) ppm. A mixture of 4chloro-N-ethyl-2-methoxy-5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-3-amine (37.0 mg, 0.10 mmol), K2CO3 (40 mg), MeOH (1.5 ml) and H2O (0.3 ml) was stirred for 16 h at room temperature. After removal of solvent under reduced pressure, the mixture was taken into aq. NaHCO3 and extracted with DCM. The organic layer was dried and concentrated in vacuo to give 27 mg (93%) of 4-chloro-N-ethyl-2-methoxy-5-methyl-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-3-amine. 1H-NMR (CDCl3) δ 3.85 (s, 3H), 3.47 (m, 1H), 3.23 (m, 2H), 3.16 (m, 2H), 3.08 (m, 1H), 2.89 (dd, 2H), 2.69 (dd, 1H), 1.22 (d, 3H), 1.09 (t, 3H) ppm.

Workup

  1. customAfter removal of solvent under reduced pressure
  2. extractionextracted with DCM
  3. customThe organic layer was dried
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-4d5fc98407df4293b0f16f8e9d55d7ff
Source dataset
uspto-grants-2011_03
Patent number
US07897595B2

Reaction notes

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