Sodium Hydroxide → 1-(tert-butoxycarbonyl)-4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)piperidine-4-carboxylic acid

HRID 711030Notes

Reaction equation

HRID 711030 reaction equation
[I:1][C:2]1[C:6]([CH2:7][C:8]2([C:21]([O:23]CC)=[O:22])[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][CH2:9]2)=[CH:5][N:4]([CH:26]([CH3:28])[CH3:27])[N:3]=1.[OH-].[Na+]>CO>[C:17]([O:16][C:14]([N:11]1[CH2:12][CH2:13][C:8]([CH2:7][C:6]2[C:2]([I:1])=[N:3][N:4]([CH:26]([CH3:27])[CH3:28])[CH:5]=2)([C:21]([OH:23])=[O:22])[CH2:9][CH2:10]1)=[O:15])([CH3:20])([CH3:18])[CH3:19]

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 674915631-tert-butyl 4-ethyl 4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)piperidine-1,4-dicarboxylate

Product 1

HCID 674914961-(tert-butoxycarbonyl)-4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)piperidine-4-carboxylic acidYield 100.1%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 1-tert-butyl 4-ethyl 4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)piperidine-1,4-dicarboxylate (455 mg, 0.9 mmol) in methanol (20 mL) was added 2 N NaOH (5 mL). After stirring for 18 hours at room temperature, the methanol was removed under reduced pressure and the resultant slurry was taken up in 20 mL water, acidified with 2 N HCl and extracted with ethyl acetate (2×30 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated to yield 1-(tert-butoxycarbonyl)-4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)piperidine-4-carboxylic acid (430 mg) as a colorless solid. −APCI (M−H) 476.1; 1H NMR (400 MHz, CDCl3, δ): 7.11 (s, 1H), 4.45 (dquin, J=13.4, 6.7 Hz, 1H), 3.95 (br. s., 2H), 2.91 (m, 2H), 2.69 (s, 2H), 2.08 (m, 2H), 1.47 (m, 8H).

Workup

  1. customthe methanol was removed under reduced pressure
  2. extractionextracted with ethyl acetate (2×30 mL)
  3. dry with materialThe combined organic extracts were dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-b33496cbb69d420682ae9d0224852fed
Source dataset
uspto-grants-2015_11
Patent number
US09181252B2

Reaction notes

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