Water → 3,4-dichloro-5-methyl-N-[(3S,4R)-3-propoxypiperidin-4-yl]-1H-pyrrole-2-carboxamide

HRID 655789Notes

Reaction equation

HRID 655789 reaction equation
[Cl:1][C:2]1[C:6]([Cl:7])=[C:5]([CH3:8])[NH:4][C:3]=1[C:9]([NH:11][C@@H:12]1[CH2:17][CH2:16][N:15](C(OCC)=O)[CH2:14][C@@H:13]1[O:23][CH2:24][CH2:25][CH3:26])=[O:10].[OH-].[K+].O.NN.O>C(O)CO>[Cl:1][C:2]1[C:6]([Cl:7])=[C:5]([CH3:8])[NH:4][C:3]=1[C:9]([NH:11][C@@H:12]1[CH2:17][CH2:16][NH:15][CH2:14][C@@H:13]1[O:23][CH2:24][CH2:25][CH3:26])=[O:10]

Participants

6

Reactant 4

HCID 962WaterHCID 14797Potassium HydroxideHCID 24654Hydrazine hydrate (1:1)HCID 59402445ethyl (3S,4R)-4-{[(3,4-dichloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}-3-propoxypiperidine-1-carboxylate2×

Product 1

HCID 594025763,4-dichloro-5-methyl-N-[(3S,4R)-3-propoxypiperidin-4-yl]-1H-pyrrole-2-carboxamideYield 62.5%

Reagents, catalysts & solvents 1

HCID 174Ethylene GlycolSolvent

Procedure

A solution of ethyl (3S,4R)-4-{[(3,4-dichloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}-3-propoxypiperidine-1-carboxylate (Intermediate 77, 3.3 g, 8.12 mmol) potassium hydroxide (4.55 g, 81.2 mmol), and hydrazine hydrate (4.06 g, 81.2 mmol) in ethylene glycol (100 mL) was stirred for 60 h at 120° C. The reaction mixture was cooled to room temperature and poured into water (300 mL) and extracted with ethyl acetate (2×300 mL). The combined organic extracts were dried over anhydrous sodium sulphate, filtered, and concentrated under vacuum to afford 3,4-dichloro-5-methyl-N-[(3S,4R)-3-propoxypiperidin-4-yl]-1H-pyrrole-2-carboxamide 1.5 mg, (62.5%) as solid.

Workup

  1. extractionextracted with ethyl acetate (2×300 mL)
  2. dry with materialThe combined organic extracts were dried over anhydrous sodium sulphate
  3. filtrationfiltered
  4. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-e52f69d6646b4852852bc318179f3cbf
Source dataset
uspto-grants-2011_12
Patent number
US08071605B2

Reaction notes

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