Hydrochloric Acid → 1-[5-[2-(Ethylcarbamoylamino)-6-methoxy-1,3-benzothiazol-5-yl]pyrimidin-2-yl]-4-methyl-piperidine-4-carboxylic acid

HRID 712333Notes

Reaction equation

HRID 712333 reaction equation
[CH2:1]([NH:3][C:4]([NH:6][C:7]1[S:8][C:9]2[CH:15]=[C:14]([O:16][CH3:17])[C:13]([C:18]3[CH:19]=[N:20][C:21]([N:24]4[CH2:29][CH2:28][C:27]([CH3:35])([C:30]([O:32]CC)=[O:31])[CH2:26][CH2:25]4)=[N:22][CH:23]=3)=[CH:12][C:10]=2[N:11]=1)=[O:5])[CH3:2].[OH-].[Na+].Cl.C(Cl)Cl>C(O)C.O>[CH2:1]([NH:3][C:4]([NH:6][C:7]1[S:8][C:9]2[CH:15]=[C:14]([O:16][CH3:17])[C:13]([C:18]3[CH:19]=[N:20][C:21]([N:24]4[CH2:25][CH2:26][C:27]([CH3:35])([C:30]([OH:32])=[O:31])[CH2:28][CH2:29]4)=[N:22][CH:23]=3)=[CH:12][C:10]=2[N:11]=1)=[O:5])[CH3:2]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 6344DichloromethaneHCID 14798Sodium HydroxideHCID 86664042Ethyl 1-[5-[2-(ethylcarbamoylamino)-6-methoxy-1,3-benzothiazol-5-yl]pyrimidin-2-yl]-4-methyl-piperidine-4-carboxylate

Product 1

HCID 866640431-[5-[2-(Ethylcarbamoylamino)-6-methoxy-1,3-benzothiazol-5-yl]pyrimidin-2-yl]-4-methyl-piperidine-4-carboxylic acid

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Conditions

Temperature
60 °C

Procedure

Ethyl 1-[5-[2-(ethylcarbamoylamino)-6-methoxy-1,3-benzothiazol-5-yl]pyrimidin-2-yl]-4-methyl-piperidine-4-carboxylate (101 mg, 0.20 mmol) was suspended in ethanol (2 mL) and sodium hydroxide solution (2 mL, 1 M, aq) was added to give a pale yellow solution and the mixture heated to 60° C. for 1 h 40 minutes then left to cool to rt overnight. The mixture was acidified to pH 3 with HCl solution (1 M, aq) and diluted with water. DCM was added but the material did not dissolve so the mixture was concentrated under reduced pressure to remove the DCM then filtered through a PTFE filter (the filter was treated with ˜2 mL DCM to make it more permeable to aqueous suspensions) and rinsed with water (2 mL). A white solid was obtained which was dried in a vacuum oven at 40° C. to give Compound 198, 75 mg (79%). 1H NMR (DMSO): δ 1.11 (3H, t, J=7.1 Hz), 1.21 (3H, s), 1.40 (2H, ddd, J=13.8, 9.9 and 3.8 Hz), 2.02 (2H, dt, J=13.8 and 3.8 Hz), 3.20 (2H, dt, J=12.8 and 7.1 Hz), 3.33 (2H, m), 3.83 (3H, s), 4.28 (2H, dt, J=13.8 and 4.5 Hz), 6.71 (1H, br t, J=5.7 Hz), 7.56 (1H, s), 7.65 (1H, s), 8.53 (2H, s), 10.56 (1H, br s), 12.44 (1H, br s). MS: 471.13 [M+H]+.

Workup

  1. customto give a pale yellow solution
  2. waitthen left
  3. temperatureto cool to rt overnight
  4. dissolutionthe material did not dissolve so the mixture
  5. concentrationwas concentrated under reduced pressure
  6. customto remove the DCM
  7. filtrationthen filtered through a PTFE
  8. filtrationfilter (the filter
  9. additionwas treated with ˜2 mL DCM
  10. washrinsed with water (2 mL)
  11. customA white solid was obtained which
  12. customwas dried in a vacuum oven at 40° C.

Sources & evidence

ORD record
ord-694386ced55b4733952a8188b1c4f4a1
Source dataset
uspto-grants-2015_11
Patent number
US09181234B2

Reaction notes

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