Reaction equation
C([Li])CCC.[OH:6][CH2:7][CH2:8][C:9]#[N:10].[C:11]12([CH2:22][C:21](=[O:23])[O:20][C:18](=[O:19])[CH2:17]1)[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]2>C1COCC1>[C:9]([CH2:8][CH2:7][O:6][C:21]([CH2:22][C:11]1([CH2:17][C:18]([OH:20])=[O:19])[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1)=[O:23])#[N:10]Participants
Conditions
- Temperature
- 30 °C
Procedure
8.2 mL of 1.6M butyllithium was added to a −78° C. solution of 3-hydroxy-propionitrile (13.19 mmol) in 50 mL of THF. The reaction mixture was warmed to 30° C. and stirred for 30 minutes. Then, a solution of 1,1-cyclohexanediacetic anhydride (10.99 mmol) in 10 mL of THF was added dropwise. The reaction mixture was warmed to room temperature over a period of one hour and stirred at room temperature with monitoring by TLC. When the reaction was judged complete, the reaction mixture was quenched with saturated ammonium chloride solution and THF was removed under reduced pressure. The aqueous layer was extracted with ethyl acetate, washed with brine and dried over Na2SO4. After concentration in vacuo the residue was purified on silica gel (5% methanol in dichloromethane) to afford 2.64 g (95%) of the title compound. 1H NMR (CDCl3): δ 4.28 (2H, t, J=6.4 Hz); 2.71 (2H, t, J=6.4 Hz); 2.61 (4H, m); 1.52-1.42 (10H, m).
Workup
- temperatureThe reaction mixture was warmed to room temperature over a period of one hour
- stirringstirred at room temperature with monitoring by TLC
- customthe reaction mixture was quenched with saturated ammonium chloride solution and THF
- customwas removed under reduced pressure
- extractionThe aqueous layer was extracted with ethyl acetate
- washwashed with brine
- dry with materialdried over Na2SO4
- concentrationAfter concentration in vacuo the residue
- customwas purified on silica gel (5% methanol in dichloromethane)
Sources & evidence
- ORD record
- ord-7832593f915c431eb735f2f2aafe911a
- Source dataset
- uspto-grants-2012_03
- Patent number
- US08143437B2
Linked notes
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