4-Methylmorpholine → 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxo-1-(pentan-3-yl)piperidin-3-yl)acetamide
Reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=3)[N:12]([CH:21]([CH2:24][CH3:25])[CH2:22][CH3:23])[C:11](=[O:26])[C@:10]([CH2:28][C:29]([OH:31])=O)([CH3:27])[CH2:9]2)[CH:5]=[CH:6][CH:7]=1.C[N:33]1CCOCC1.ClC(OCC(C)C)=O.[OH-].[NH4+]>C1COCC1>[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:15]=[CH:16][C:17]([Cl:20])=[CH:18][CH:19]=3)[N:12]([CH:21]([CH2:24][CH3:25])[CH2:22][CH3:23])[C:11](=[O:26])[C@:10]([CH2:28][C:29]([NH2:33])=[O:31])([CH3:27])[CH2:9]2)[CH:5]=[CH:6][CH:7]=1Participants
6
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 0 °C
Procedure
To an ice-cooled solution of 1.15 g (2.49 mmol) of 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxo-1-(pentan-3-yl)piperidin-3-yl)acetic acid (Example 71, Step F) in THF (12.5 mL) was added 383 μL (3.48 mmol) of N-methylmorpholine and 392 μL (2.98 mmol) of isobutyl chloroformate. The resulting off-white slurry was stirred at 0° C. for 2 h, and then 336 μL (28% ammonia in water, 4.97 mmol) of ammonium hydroxide was added. After an additional 3 h at 0° C., the reaction was quenched with saturated aqueous ammonium chloride and extracted with EtOAc (3×). The combined organic layers were dried over Na2SO4, filtered and the filtrate was concentrated. The crude title compound was used directly in the next step.
Workup
- waitAfter an additional 3 h at 0° C.
- customthe reaction was quenched with saturated aqueous ammonium chloride
- extractionextracted with EtOAc (3×)
- dry with materialThe combined organic layers were dried over Na2SO4
- filtrationfiltered
- concentrationthe filtrate was concentrated
Sources & evidence
- ORD record
- ord-fc0be19e1e9343888e6a760b5ce88fa2
- Source dataset
- uspto-grants-2016_03
- Patent number
- US09296736B2
Reaction notes
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