Methanol → (3S)-3-[(tert-butoxycarbonyl)amino]-1-(1-hydroxy-1-methylethyl)cyclopentanecarboxylic acid
Reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]1[CH2:13][CH2:12][C:11]([C:18]([OH:21])([CH3:20])[CH3:19])([C:14]([O:16]C)=[O:15])[CH2:10]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CO.O.O.[OH-].[Li+]>O1CCCC1>[C:1]([O:5][C:6]([NH:8][C@H:9]1[CH2:13][CH2:12][C:11]([C:18]([OH:21])([CH3:20])[CH3:19])([C:14]([OH:16])=[O:15])[CH2:10]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]Participants
6
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 110 °C
Procedure
To a solution of methyl (3S)-3-[(tert-butoxycarbonyl)amino]-1-(1-hydroxy-1-methylethyl)cyclopentanecarboxylate (1.0 g, 3.3 mmol) in a mixture of tetrahydrofuran (30 mL), methanol (30 mL) and water (6 mL) was added Lithium hydroxide monohydrate (0.22 g, 5.3 mmol) and the mixture refluxed overnight (110° C.). The organic solvents were evaporated and the aqueous layer was washed with ether one time. The aqueous layer was then acidified with 6 N HCl to about pH 4 and extracted with methylene chloride three times. The combined extracts were dried, filtered, and concentrated to provide the desired product (0.47 g, 49%).
Workup
- customThe organic solvents were evaporated
- washthe aqueous layer was washed with ether one time
- extractionextracted with methylene chloride three times
- customThe combined extracts were dried
- filtrationfiltered
- concentrationconcentrated
Sources & evidence
- ORD record
- ord-265e2743f9bd4aefa29d2d209b1b8b20
- Source dataset
- uspto-grants-2008_11
- Patent number
- US07449467B2
Reaction notes
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