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

HRID 1879775Notes

Reaction equation

C([N:8]1[CH2:14][C:13]2[N:15]=[CH:16][C:17]([N:19]([CH3:23])[CH2:20][CH2:21][CH3:22])=[N:18][C:12]=2[O:11][C@@H:10]([CH2:24][O:25][CH3:26])[CH2:9]1)C1C=CC=CC=1.C(OCC)(=O)C.[ClH:33]>CO.[OH-].[OH-].[Pd+2]>[ClH:33].[CH3:26][O:25][CH2:24][C@H:10]1[CH2:9][NH:8][CH2:14][C:13]2[N:15]=[CH:16][C:17]([N:19]([CH3:23])[CH2:20][CH2:21][CH3:22])=[N:18][C:12]=2[O:11]1

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of (6R)-8-benzyl-6-(methoxymethyl)-N-methyl-N-propyl-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepin-3-amine (465 mg) in methanol (10 mL) was added 20% Pd(OH)2/C (50 mg), and the mixture was stirred under a hydrogen atmosphere at 50° C. for 3 hr. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. To a solution of the obtained crude product in ethyl acetate (10 mL) was added a 4 N hydrogen chloride-ethyl acetate solution (359 μL), and the mixture was stirred for 1 hr. The reaction mixture was filtered, and the obtained crystals were washed with ethyl acetate to give the title compound (223 mg, 56%).

Workup

filtrationThe reaction mixture was filtered
concentrationthe filtrate was concentrated under reduced pressure
customTo a solution of the obtained crude product in ethyl acetate (10 mL)
stirringthe mixture was stirred for 1 hr
filtrationThe reaction mixture was filtered
washthe obtained crystals were washed with ethyl acetate

Sources & evidence

ORD record: ord-7d2306a27ef644aba81db6e6a2772896
Source dataset: uspto-grants-2012_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08318722B2

Reaction notes

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