Hydrochloric Acid → Cxd-101

HRID 222403Notes

Reaction equation

HRID 222403 reaction equation
[CH3:1][N:2]1[CH:6]=[C:5]([CH2:7][N:8]2[CH2:13][CH2:12][CH:11]([C:14]3[CH:36]=[CH:35][C:17]([C:18]([NH:20][C:21]4[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=4[NH:27]C(=O)OC(C)(C)C)=[O:19])=[CH:16][CH:15]=3)[CH2:10][CH2:9]2)[C:4]([CH3:37])=[N:3]1.Cl.[OH-].[Na+]>O1CCOCC1.O.C(OCC)C>[NH2:27][C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=1[NH:20][C:18](=[O:19])[C:17]1[CH:35]=[CH:36][C:14]([CH:11]2[CH2:10][CH2:9][N:8]([CH2:7][C:5]3[C:4]([CH3:37])=[N:3][N:2]([CH3:1])[CH:6]=3)[CH2:13][CH2:12]2)=[CH:15][CH:16]=1

Participants

7

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 59830877tert-Butyl (2-{[4-(1-{1,3-dimethyl-1H-pyrazol-4-ylmethyl}piperidin-4-yl)benzoyl]amino}phenyl)carbamate

Product 1

HCID 16225380Cxd-101Yield 93.3%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 3283Diethyl EtherSolventHCID 312751,4-DioxaneSolvent2×

Conditions

Temperature
0 °C

Procedure

tert-Butyl (2-{[4-(1-{1,3-dimethyl-1H-pyrazol-4-ylmethyl}piperidin-4-yl)benzoyl]amino}phenyl)carbamate (prepared as described in Method 6 below; 7.61 g, 15.11 mmol) was dissolved in 1,4 dioxane (70 ml) and cooled to 0° C., using an ice-water bath. A 4M solution of hydrogen chloride in 1,4 dioxane (150 ml, 600 mmol) was then added slowly. The resultant suspension was allowed to warm to room temperature and lumps broken up by agitation with a glass rod. The reaction mixture was stirred at room temperature for 18 hours. The mixture was filtered, under suction. The solid obtained was dissolved in water (200 ml), and the solution adjusted to pH 12 by slow addition of a 2M aqueous solution of sodium hydroxide. The mixture obtained was extracted with dichloromethane (300 ml) and the organics separated. The aqueous phase was further extracted with dichloromethane (200 ml) and the combined extracts washed with brine, dried over magnesium sulphate, filtered and evaporated to give a clear gum. The gum was taken up in diethyl ether and re-evaporated to dryness to afford the title compound (5.69 g, 93%); NMR Spectrum (CDCl3) δ 1.81 (m, 4H), 2.07 (m, 2H), 2.25 (s, 3H), 2.56 (m, 1H), 3.04 (m, 2H), 3.39 (s, 2H), 3.81 (s, 3H), 3.85 (s, 2H), 6.84 (m, 2H), 7.08 (m, 1H), 7.24 (s, 1H), 7.33 (m, 3H), 7.82 (m, 3H).

Workup

  1. temperatureto warm to room temperature
  2. filtrationThe mixture was filtered, under suction
  3. customThe solid obtained
  4. customThe mixture obtained
  5. extractionwas extracted with dichloromethane (300 ml)
  6. extractionThe aqueous phase was further extracted with dichloromethane (200 ml)
  7. washthe combined extracts washed with brine
  8. dry with materialdried over magnesium sulphate
  9. filtrationfiltered
  10. customevaporated
  11. customto give a clear gum
  12. customre-evaporated to dryness

Sources & evidence

ORD record
ord-e9f2d9dfd9e04cf99be839b42b01186d
Source dataset
uspto-grants-2012_06
Patent number
US08207202B2

Reaction notes

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