Potassium Carbonate → HCID 178430480, compound

HRID 597913Notes

Reaction equation

HRID 597913 reaction equation
[I:1][C:2]1[C:19]([OH:20])=[N:18][C:5]2[CH2:6][CH2:7][N:8](C(=O)C(F)(F)F)[CH2:9][CH:10]([CH3:11])[C:4]=2[CH:3]=1.C([O-])([O-])=O.[K+].[K+]>CO>[I:1][C:2]1[C:19]([OH:20])=[N:18][C:5]2[CH2:6][CH2:7][NH:8][CH2:9][CH:10]([CH3:11])[C:4]=2[CH:3]=1

Participants

4

Reactant 2

HCID 11430Potassium CarbonateHCID 1784307093-iodo-5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-2-ol

Product 1

HCID 178430480HCID 178430480, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 5-methyl-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-2-ol hydrobromide (1.76 g, 6.79 mmol) in DCM (50 ml) and DMF (10 ml) was added Et3N (2.90 ml, 20.7 mmol) and TFAA (1.00 ml, 6.90 mmol). The mixture was stirred for 2 h at ambient temperature, concentrated in vacuo and parted between sat. aq. NaHCO3 and EtOAc. The organic phase was dried, concentrated in vacuo and purified by column chromatography to yield 1.46 g (77%) of 5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-2-ol. 1H-NMR (DMSO-d6) δ 11.43 (br s, 1H), 7.30 (m, 1H), 6.18 (m, 1H), 3.95-3.42 (m, 4H), 3.06-2.96 (m, 2H), 2.95-2.87 (m, 1H), 1.12 (2× d, 3H) ppm. A mixture of 5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-2-ol (1.36 g, 4.96 mmol) and NIS (1.12 g, 4.96 mmol) in TFA (2 ml) and AcOH (36 ml) was stirred at room temperature for 16 h. Evaporation of TFA and AcOH followed by chromatographic purification of the resulting residue gave 1.95 g (98%) of 3-iodo-5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-2-ol. 1H-NMR (CDCl3) δ 7.86 (s, 1H), 4.17-3.41 (m, 4H), 3.20-2.94 (m, 3H), 1.26 (2× d, 3H) ppm. A mixture of 3-iodo-5-methyl-7-(trifluoroacetyl)-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-2-ol (50.0 mg, 125 μmol) and K2CO3 (17.3 mg, 125 μmol) in MeOH (10 ml) was heated at reflux for 4 h. The reaction mixture was concentrated in vacuo and purified by column chromatography rendering 20.2 mg (53%) of 3-iodo-5-methyl-6,7,8,9-tetrahydro-5H-pyrido[2,3-d]azepin-2-ol. 1H-NMR (CDCl3) δ 7.90 (s, 1H), 3.09-2.80 (m, 7H), 1.28 (d, 3H) ppm.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 4 h
  3. concentrationThe reaction mixture was concentrated in vacuo
  4. custompurified by column chromatography

Sources & evidence

ORD record
ord-3d1011de7e174834a83275ac07690236
Source dataset
uspto-grants-2011_03
Patent number
US07897595B2

Reaction notes

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