Methylamine → 1-Ethyl-N-methyl-4-piperidinamine

To a solution of 40% methylamine in methanol (1.26 g) were added acetonitrile (150 ml), 1-ethyl-4-piperidone (2.0 ml) and acetic acid (0.932 ml), followed by addition of sodium triacetoxyborohydride (6.59 g) and stirring for 1 hr. To the reaction mixture was added a saturated aqueous solution of sodium hydrogencarbonate (20 ml), and the reaction mixture was concentrated under reduced pressure. The resultant residue was suspended in methanol (20 ml), the solid was removed by filtration and washed with methanol (20 ml). The filtrate was concentrated under reduced pressure, the resultant residue was suspended in tetrahydrofuran (50 ml). The solid was removed by filtration and washed with tetrahydrofuran (100 ml). The filtrate was concentrated under reduced pressure to provide a crude product of the titled compound as a pale yellow oil (3.33 g).

1. concentrationthe reaction mixture was concentrated under reduced pressure
2. customthe solid was removed by filtration
3. washwashed with methanol (20 ml)
4. concentrationThe filtrate was concentrated under reduced pressure
5. customThe solid was removed by filtration
6. washwashed with tetrahydrofuran (100 ml)
7. concentrationThe filtrate was concentrated under reduced pressure

ORD record

ord-ccd6e173234c4cf28bdc6a556cb24602

Source dataset

uspto-grants-2012_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08288538B2