Reaction equation
[NH2:1][C:2]1([C:8]([OH:10])=[O:9])[CH2:7][CH2:6][CH2:5][CH2:4][CH2:3]1.[OH-].[Na+].[O:13]1[CH:17]=[CH:16][CH:15]=[C:14]1[C:18](Cl)=[O:19].C(OCC)(=O)C>O>[O:13]1[CH:17]=[CH:16][CH:15]=[C:14]1[C:18]([NH:1][C:2]1([C:8]([OH:10])=[O:9])[CH2:7][CH2:6][CH2:5][CH2:4][CH2:3]1)=[O:19]Participants
Conditions
- Temperature
- 80 °C
Procedure
71.6 g (0.5 mol) of 1-aminocyclohexanecarboxylic acid was added to a solution of 20 g (0.5 mol) of sodium hydroxide in 250 ml of water, and the mixture was stirred at 80° C. for 2 hours. The mixture solution was cooled by ice-water, 71.8 g (0.2 mol) of 2-furancarbonyl chloride and a solution of 24 g (0.6 mol) of sodium hydroxide in 100 ml of water were simultaneously added thereto over approximately 1 hour. The reaction solution was slowly returned to room temperature and stirred overnight. After 80 ml of ethyl acetate was added to the reaction solution and the mixture was stirred for 1 hour, the insolubles were removed by filtration. The aqueous layer was separately collected, 49 ml of concentrated hydrochloric acid was added thereto under ice-cooling. The precipitated crystal was collected by filtration and dried-under reduced pressure to obtain 112.6 g (95%) of the title compound.
Workup
- waitover approximately 1 hour
- customwas slowly returned to room temperature
- stirringstirred overnight
- stirringthe mixture was stirred for 1 hour
- customthe insolubles were removed by filtration
- customThe aqueous layer was separately collected
- addition49 ml of concentrated hydrochloric acid was added
- temperatureunder ice-cooling
- filtrationThe precipitated crystal was collected by filtration and dried-under reduced pressure
Sources & evidence
- ORD record
- ord-d2bb77af91dd4b7eae884941754e58c0
- Source dataset
- uspto-grants-2014_09
- Patent number
- US08829209B2
Linked notes
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