Reaction equation
Cl.[Sn](Cl)Cl.[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([N:12]2[CH2:17][CH2:16][CH2:15][CH2:14][CH2:13]2)=[C:8]([N+:18]([O-])=O)[CH:7]=1.C(=O)(O)[O-].[Na+]>CO>[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([N:12]2[CH2:17][CH2:16][CH2:15][CH2:14][CH2:13]2)=[C:8]([CH:7]=1)[NH2:18]Participants
Procedure
Concentrated hydrochloric acid (2.00 ml, 24.0 mmol) and anhydrous tin dichloride (1.84 g, 9.70 mmol) were sequentially added at 0° C. to a methanol (10 ml) solution of 1-(4-chloro-2-nitrophenyl)piperidine (471 mg, 1.95 mmol), obtained as described in Referential Example 15-1. The resulting mixture was warmed to room temperature and stirred for 16 hours. A saturated aqueous solution of sodium bicarbonate was added to the mixture. The mixture was extracted three times with ethyl acetate. The obtained organic layer was washed with a saturated sodium chloride solution, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (30 g, hexane/ethyl acetate=9/1). Thus, 5-chloro-2-(1-piperidinyl)aniline (388 mg, 94.3%) was yielded as a colorless oily material.
Workup
- customobtained
- extractionThe mixture was extracted three times with ethyl acetate
- washThe obtained organic layer was washed with a saturated sodium chloride solution
- dry with materialdried over anhydrous sodium sulfate
- filtrationfiltered
- concentrationconcentrated under reduced pressure
- customThe residue was purified by silica gel column chromatography (30 g, hexane/ethyl acetate=9/1)
Sources & evidence
- ORD record
- ord-dffb36988b4c4892ba46b6ab2b71e88d
- Source dataset
- uspto-grants-2009_08
- Patent number
- US07569536B2
Linked notes
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