Hydrochloric Acid → (1S,2R,4S)-4-(cyclopropanesulfonamido)-2-ethylcyclopentanecarboxylic acid

HRID 1854427Notes

Reaction equation

HRID 1854427 reaction equation
[CH:1]1([S:4]([NH:7][C@@H:8]2[CH2:12][C@H:11]([C:13]([O:15]CC)=[O:14])[C@H:10]([CH2:18][CH3:19])[CH2:9]2)(=[O:6])=[O:5])[CH2:3][CH2:2]1.[OH-].[Na+].Cl>>[CH:1]1([S:4]([NH:7][C@@H:8]2[CH2:12][C@H:11]([C:13]([OH:15])=[O:14])[C@H:10]([CH2:18][CH3:19])[CH2:9]2)(=[O:6])=[O:5])[CH2:2][CH2:3]1

Participants

4

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 58010129(1S,2R,4S)-ethyl 4-(cyclopropanesulfonamido)-2-ethylcyclopentanecarboxylate

Product 1

HCID 58010069(1S,2R,4S)-4-(cyclopropanesulfonamido)-2-ethylcyclopentanecarboxylic acid

Procedure

To a flask containing (1S,2R,4S)-ethyl 4-(cyclopropanesulfonamido)-2-ethylcyclopentanecarboxylate (11.1 g, 38.4 mmol) was added 1 N aqueous NaOH (210 mL, 210 mmol). After stirring at ambient temperature for about 8 h, the reaction was acidified to about pH 1 with 6 N aqueous HCl and extracted with DCM (3×150 mL). The combined organic layers were washed with brine, dried over anhydrous MgSO4, filtered, and concentrated under reduced pressure to give crude (1S,2R,4S)-4-(cyclopropanesulfonamido)-2-ethylcyclopentanecarboxylic acid containing about 25 mol % DCM (10.7 g, 99%): LC/MS (Table 2, Method a) Rt=1.71 min; MS m/z: 260 (M−H)−.

Workup

  1. extractionextracted with DCM (3×150 mL)
  2. washThe combined organic layers were washed with brine
  3. dry with materialdried over anhydrous MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-ecab56755ff64ad9a11084bea1f3df40
Source dataset
uspto-grants-2015_02
Patent number
US08962629B2

Reaction notes

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