1-Phenylpiperazinium chloride → (S)-3-((4-phenylpiperazin-1-yl)methyl)-6a,7,8,9-tetrahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-6(5H)-one
Reaction equation
Cl.[C:2]1([N:8]2[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]2)[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[I-].C(C[P+](C)(C)C)#N.O[CH2:23][C:24]1[CH:33]=[N:32][C:31]2[N:30]3[CH2:34][CH2:35][CH2:36][C@H:29]3[C:28](=[O:37])[NH:27][C:26]=2[CH:25]=1.CCN(C(C)C)C(C)C>C(#N)CC>[C:2]1([N:8]2[CH2:13][CH2:12][N:11]([CH2:23][C:24]3[CH:33]=[N:32][C:31]4[N:30]5[CH2:34][CH2:35][CH2:36][C@H:29]5[C:28](=[O:37])[NH:27][C:26]=4[CH:25]=3)[CH2:10][CH2:9]2)[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 90 °C
Procedure
1-Phenylpiperazine hydrochloride (11.9 mg, 0.060 mmol), (cyanomethyl)trimethylphosphonium iodide (0.025 g, 0.102 mmoles), and (S)-3-(hydroxymethyl)-6a,7,8,9-tetrahydropyrido[3,2-e]pyrrolo[1,2-a]pyrazin-6(5H)-one (0.014 g, 0.063 mmoles) were diluted with propionitrile (0.5 ml) and treated with DIPEA (0.017 ml, 0.100 mmol). The reaction mixture was stirred at 90° C. overnight. The reaction mixture was washed with water (1 mL) and concentrated. The residue was dissolved in DMSO (1 mL) and purified using HPLC (acetonitrile-water, NH4HCO3 buffered). The fractions were concentrated in vacuo, dissolved in dioxane-water (1:1, 2 mL) and lyophilized to yield the title compound as a white solid (5.1 mg, 23%). [M+H] calc'd for C21H25N5O, 364. found, 364.
Workup
- washThe reaction mixture was washed with water (1 mL)
- concentrationconcentrated
- dissolutionThe residue was dissolved in DMSO (1 mL)
- custompurified
- concentrationThe fractions were concentrated in vacuo
- dissolutiondissolved in dioxane-water (1:1, 2 mL)
Sources & evidence
- ORD record
- ord-19200b6527484d609d6395902f0969ad
- Source dataset
- uspto-grants-2015_11
- Patent number
- US09187497B2
Reaction notes
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