Hydrochloric Acid → tert-Butyl (6-(7-(4-amino-3-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)pyridin-3-yl)methyl(2-methoxyethyl)carbamate

HRID 1475543Notes

Reaction equation

HRID 1475543 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][C:3]=1[F:9].CC(C)([O-])C.[K+].[C:16]([O:20][C:21](=[O:44])[N:22]([CH2:27][C:28]1[CH:29]=[N:30][C:31]([C:34]2[S:42][C:41]3[C:36](=[N:37][CH:38]=[CH:39][C:40]=3Cl)[CH:35]=2)=[CH:32][CH:33]=1)[CH2:23][CH2:24][O:25][CH3:26])([CH3:19])([CH3:18])[CH3:17].Cl>CS(C)=O.O.C(Cl)Cl.CCOC(C)=O>[C:16]([O:20][C:21](=[O:44])[N:22]([CH2:27][C:28]1[CH:29]=[N:30][C:31]([C:34]2[S:42][C:41]3[C:36](=[N:37][CH:38]=[CH:39][C:40]=3[O:8][C:5]3[CH:6]=[CH:7][C:2]([NH2:1])=[C:3]([F:9])[CH:4]=3)[CH:35]=2)=[CH:32][CH:33]=1)[CH2:23][CH2:24][O:25][CH3:26])([CH3:19])([CH3:17])[CH3:18]

Participants

9

Reactant 4

HCID 313Hydrochloric AcidHCID 27359194-Amino-3-fluorophenolHCID 23665647Potassium tert-butoxideHCID 57919613tert-Butyl ((6-(7-chlorothieno[3,2-b]pyridin-2-yl)pyridin-3-yl)methyl)(2-methoxyethyl)carbamate

Product 1

HCID 57919486tert-Butyl (6-(7-(4-amino-3-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)pyridin-3-yl)methyl(2-methoxyethyl)carbamateYield 32%

Reagents, catalysts & solvents 4

HCID 679Dimethyl SulfoxideSolventHCID 962WaterSolvent2×HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of 4-amino-3-fluorophenol (19) in DMSO (12 mL) was added potassium tert-butoxide (0.824 g, 7.34 mmol). After 30 min, intermediate 11 (2.451 g, 5.65 mmol) was added and the reaction mixture was heated at 100° C. for 1.5 h, cooled to room temperature, poured in water (50 mL) at 40-45° C. and stirred for 30 min. EtOAc (40 mL), DCM (40 mL) and water (40 ml) were added and the pH was adjusted to 7 by addition of HCl. Solids were removed by filtration through a paper filter and the two phases were separated. The organic layer was collected, dried over anhydrous Na2SO4, filtered and concentrated. The residue was purified by flash column chromatography (eluent DCM/MeOH: 99/1, 98/2, 95/5), to afford intermediate 20 (0.952 g, 32% yield). MS (m/z): 525.2 (M+H).

Workup

  1. temperaturecooled to room temperature
  2. customSolids were removed by filtration through a paper
  3. filtrationfilter
  4. customthe two phases were separated
  5. customThe organic layer was collected
  6. dry with materialdried over anhydrous Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe residue was purified by flash column chromatography (eluent DCM/MeOH: 99/1, 98/2, 95/5)

Sources & evidence

ORD record
ord-b7dd0e218fd84aeb880cdd2884dfbf12
Source dataset
uspto-grants-2015_04
Patent number
US09018378B2

Reaction notes

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