Hydrogen chloride-ethyl acetate → N-methyl-N-(1-methylpropyl)-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepin-3-amine hydrochloride

HRID 2188707Notes

Reaction equation

C([N:8]1[CH2:14][C:13]2[N:15]=[CH:16][C:17]([N:19]([CH3:24])[CH:20]([CH3:23])[CH2:21][CH3:22])=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)C1C=CC=CC=1.C(OCC)(=O)C.[ClH:31]>CO.[OH-].[OH-].[Pd+2]>[ClH:31].[CH3:24][N:19]([CH:20]([CH3:23])[CH2:21][CH3:22])[C:17]1[CH:16]=[N:15][C:13]2[CH2:14][NH:8][CH2:9][CH2:10][O:11][C:12]=2[N:18]=1

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of 8-benzyl-N-methyl-N-(1-methylpropyl)-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepin-3-amine (0.64 g) in methanol (20 mL) was added 20% Pd(OH)2/C (0.13 g), and the mixture was stirred under a hydrogen atmosphere at 50° C. for 2 hr. The reaction mixture was filtered, and the filtrate was concentrated. To a solution of the obtained crude product in ethyl acetate (20 mL) was added a 4 N hydrogen chloride-ethyl acetate solution (540 μL), and the mixture was stirred for 30 min. The reaction mixture was filtered, and the obtained crystals were purified by recrystallization (methanol-ethyl acetate) to give the title compound (0.44 g, 82%) as a pale-yellow powder.

Workup

filtrationThe reaction mixture was filtered
concentrationthe filtrate was concentrated
customTo a solution of the obtained crude product in ethyl acetate (20 mL)
stirringthe mixture was stirred for 30 min
filtrationThe reaction mixture was filtered
customthe obtained crystals were purified by recrystallization (methanol-ethyl acetate)

Sources & evidence

ORD record: ord-6c216b1fbe8f49c79dd221ea7ebc8adf
Source dataset: uspto-grants-2012_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08324201B2

Reaction notes

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