Tetrahydrofuran → [3,5-Bis(dimethylamino)-4-(piperidin-1-yl)phenyl]methanol
Reaction equation
[CH3:1][N:2]([CH3:22])[C:3]1[CH:4]=[C:5]([CH:10]=[C:11]([N:19]([CH3:21])[CH3:20])[C:12]=1[N:13]1[CH2:18][CH2:17][CH2:16][CH2:15][CH2:14]1)[C:6](OC)=[O:7].O1CCCC1.[H-].[Al+3].[Li+].[H-].[H-].[H-]>C(OCC)(=O)C>[CH3:1][N:2]([CH3:22])[C:3]1[CH:4]=[C:5]([CH:10]=[C:11]([N:19]([CH3:21])[CH3:20])[C:12]=1[N:13]1[CH2:18][CH2:17][CH2:16][CH2:15][CH2:14]1)[CH2:6][OH:7]Participants
5
Procedure
A solution of 25 g. of methyl 3,5-bis(dimethylamino)-4-piperidinobenzoate in 150 ml. of absolute tetrahydrofuran was added dropwise to a solution of lithium aluminum hydride in 300 ml. of absolute tetrahydrofuran, and the mixture was boiled under reflux for 3 hours. After cooling, the excess lithium aluminum hydride was cautiously decomposed with 100 ml. of ethyl acetate and then with 3 ml. of water and the sodium evaporated to dryness. The residue was taken up in water, the oily product extracted with ethyl acetate and the ethyl acetate solution dried and evaporated. After recrystallization from high-boiling petroleum ether, there was obtained 3,5-bis(dimethylamino)-4-piperidinobenzyl alcohol having a melting point of 90°-92° C.
Workup
- temperatureunder reflux for 3 hours
- temperatureAfter cooling
- customof water and the sodium evaporated to dryness
- extractionthe oily product extracted with ethyl acetate
- dry with materialthe ethyl acetate solution dried
- customevaporated
- customAfter recrystallization from high-boiling petroleum ether
Sources & evidence
- ORD record
- ord-0e5870098daf490c8e4cb65e6406183d
- Source dataset
- uspto-grants-1977_08
- Patent number
- US04039543
Reaction notes
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