Dimethylamine → N,N-Dimethyl-[5-(6-phenylhexyl)-4,5,6,7-tetrahydrofuro[3,2-c]pyridin-2-ylmethyl)amine

HRID 611080Notes

Reaction equation

[C:1]1([CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][N:13]2[CH2:18][CH2:17][C:16]3[O:19][CH:20]=[CH:21][C:15]=3[CH2:14]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:22][NH:23][CH3:24].[CH2:25]=O>C(O)(=O)C>[CH3:22][N:23]([CH2:25][C:20]1[O:19][C:16]2[CH2:17][CH2:18][N:13]([CH2:12][CH2:11][CH2:10][CH2:9][CH2:8][CH2:7][C:1]3[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=3)[CH2:14][C:15]=2[CH:21]=1)[CH3:24]

Participants

Conditions

Temperature: 100 °C

Procedure

To a solution of 0.288 g (1.016 mmol) of 5-(6-phenylhexyl)-4,5,6,7-tetrahydrofuro[3,2-c]pyridine in 20 ml of acetic acid, 0.11 g (1.2 mmol) of 50% aqueous dimethylamine and 0.10 g (1.2 mmol) of 37% aqueous formaldehyde were added, followed by stirring at 100° C. for 30 minutes. After the solvent was distilled off under reduced pressure, the residual solution was alkalified with aqueous sodium hydroxide and extracted with dichloromethane 3 times. The combined organic layer was dried over anhydrous magnesium sulfate; the solvent was distilled off under reduced pressure. The resulting crude product was purified by silica gel column chromatography (ethyl acetate to ethyl acetate/methanol=2/1) to yield the desired product.

Workup

distillationAfter the solvent was distilled off under reduced pressure
extractionextracted with dichloromethane 3 times
dry with materialThe combined organic layer was dried over anhydrous magnesium sulfate
distillationthe solvent was distilled off under reduced pressure
customThe resulting crude product was purified by silica gel column chromatography (ethyl acetate to ethyl acetate/methanol=2/1)

Sources & evidence

ORD record: ord-cc8aae13238e471f89b2900b65efc635
Source dataset: uspto-grants-1999_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05998433

Reaction notes

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