Tetrahydrofuran → HCID 68408396, compound
Reaction equation
[CH2:1]([N:8]1[CH2:13][CH2:12][C:11]([N:16]([CH3:18])[CH3:17])([C:14]#N)[CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CO.C(Cl)(Cl)Cl.[NH4+].[Cl-].[CH2:27]1[CH2:31]OC[CH2:28]1>>[CH2:1]([N:8]1[CH2:9][CH2:10][C:11]([CH2:14][CH2:28][CH2:27][CH3:31])([N:16]([CH3:17])[CH3:18])[CH2:12][CH2:13]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1Participants
Procedure
A little iodine was added to a mixture of 17.7 g (6 eq) magnesium and 50 ml dry ether, followed over a period of 1 h by 100 g (6 eq) bromobutane dissolved in 100 ml dry ether. This reaction mixture was stirred for 1 h at room temperature. The Grignard reagent produced in the preceding step was added over a period of 20 min to a solution of 30 g (1 eq) 1-benzyl-4-(dimethylamino)piperidine-4-carbonitrile dissolved in 210 ml dry THF and the reaction mixture obtained was then stirred for 12 h at room temperature. The reaction course was monitored by thin-layer chromatography (10% MeOH/CHCl3). Once the conversion was complete, the reaction solution was cooled to 0° C., mixed with saturated NH4Cl solution, filtered over celite, extracted with ethyl acetate (3×200 ml) and the combined organic phases were dried over Na2SO4. Following removal of the solvent under reduced pressure, the residue was purified by column chromatography (aluminium oxide neutral; hexane). 18.2 g (53%) of product were obtained in the form of an oil.
Workup
- customthe reaction mixture obtained
- temperaturethe reaction solution was cooled to 0° C.
- filtrationfiltered over celite
- extractionextracted with ethyl acetate (3×200 ml)
- dry with materialthe combined organic phases were dried over Na2SO4
- customremoval of the solvent under reduced pressure
- customthe residue was purified by column chromatography (aluminium oxide neutral; hexane)
Sources & evidence
- ORD record
- ord-1f9e88cff48f4d1aa0e56c5e9c8dd0a2
- Source dataset
- uspto-grants-2015_12
- Patent number
- US09206156B2
Reaction notes
Loading…