Methanol → HCID 90304553, compound

HRID 62457Notes

Reaction equation

[C:1]([CH2:3][CH2:4][CH:5]([C:10]1[N:14]2[CH:15]=[CH:16][N:17]=[C:18]([NH:19][CH2:20][C:21]3[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][C:22]=3[O:29][CH3:30])[C:13]2=[C:12]([C:31]2[CH:40]=[CH:39][C:34]([C:35]([O:37][CH3:38])=[O:36])=[CH:33][CH:32]=2)[N:11]=1)[C:6]([O:8]C)=O)#[N:2].CO>CCO.[Ni]>[CH3:30][O:29][C:22]1[CH:23]=[C:24]([O:27][CH3:28])[CH:25]=[CH:26][C:21]=1[CH2:20][NH:19][C:18]1[C:13]2[N:14]([C:10]([CH:5]3[CH2:4][CH2:3][CH2:1][NH:2][C:6]3=[O:8])=[N:11][C:12]=2[C:31]2[CH:32]=[CH:33][C:34]([C:35]([O:37][CH3:38])=[O:36])=[CH:39][CH:40]=2)[CH:15]=[CH:16][N:17]=1

Participants

Conditions

Temperature: 75 °C

Procedure

To a solution of methyl 4-(3-(4-cyano-1-methoxy-1-oxobutan-2-yl)-8-((2,4-dimethoxybenzyl)amino)imidazo[1,5-a]pyrazin-1-yl)benzoate (12 g, 22.1 mmol) in EtOH (350 mL) was added Ra—Ni (24 g) under N2. The suspension was degassed under vacuum and purged with H2 several times. The mixture was stirred under H2 (50 psi) at 75° C. for 7 hours. The reaction was complete detected by LCMS. The suspension was filtered through a pad of Celite and the pad was washed with EtOH (20 mL×3). The combined filtrates were concentrated. The residue was purified by column chromatography on silica gel eluted with DCM:MeOH=30:1 to give methyl 4-(8-((2,4-dimethoxybenzyl)amino)-3-(2-oxopiperidin-3-yl)imidazo[1,5-a]pyrazin-1-yl)benzoate (4.6 g, yield 40%).

Workup

customThe suspension was degassed under vacuum
custompurged with H2 several times
filtrationThe suspension was filtered through a pad of Celite
washthe pad was washed with EtOH (20 mL×3)
concentrationThe combined filtrates were concentrated
customThe residue was purified by column chromatography on silica gel
washeluted with DCM

Sources & evidence

ORD record: ord-9451584972f74532876f40a018e6ef07
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09446130B2

Reaction notes

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