Dichloromethane → 6-(5-chloro-2-fluoropyridin-4-yl)-5-methyl-N-((tetrahydro-2H-pyran-4-yl)methyl) pyrazin-2-amine

HRID 1623388Notes

Reaction equation

Cl[C:2]1[N:3]=[CH:4][C:5]([NH:16][CH2:17][CH:18]2[CH2:23][CH2:22][O:21][CH2:20][CH2:19]2)=[N:6][C:7]=1[C:8]1[C:13]([Cl:14])=[CH:12][N:11]=[C:10]([F:15])[CH:9]=1.[C:24]([O-])([O-])=O.[Na+].[Na+].CB(O)O.C(Cl)Cl>COCCOC.CCOC(C)=O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[Cl:14][C:13]1[C:8]([C:7]2[N:6]=[C:5]([NH:16][CH2:17][CH:18]3[CH2:23][CH2:22][O:21][CH2:20][CH2:19]3)[CH:4]=[N:3][C:2]=2[CH3:24])=[CH:9][C:10]([F:15])=[N:11][CH:12]=1

Participants

Conditions

Temperature: 105 °C

Procedure

To a degassed suspension of 5-chloro-6-(5-chloro-2-fluoropyridin-4-yl)-N-((tetrahydro-2H-pyran-4-yl)methyl)pyrazin-2-amine (10 mg, 0.028 mmol), Na2CO3 (0.036 ml, 2 M, 0.072 mmol) and methylboronic acid (5 mg, 0.084 mmol) in DME (1 ml) was added PdCl2(dppf).CH2Cl2 adduct (6 mg, 7.35 μmol). The reaction was capped and heated to 105° C. for 4 hr an oil bath. The reaction was diluted with EtOAc and washed with H2O, sat NaCl. The organic layer was dried Na2SO4, filtered and concentrated. The crude was purified by column chromatography on silica gel (50% EtOAc/Hexane) to yield 6-(5-chloro-2-fluoropyridin-4-yl)-5-methyl-N-((tetrahydro-2H-pyran-4-yl)methyl)pyrazin-2-amine (7 mg, 0.021 mmol, 74.2% yield). LCMS (m/z): 337.2 (MH+), retention time=0.81 min.

Workup

customThe reaction was capped
washwashed with H2O
filtrationfiltered
concentrationconcentrated
customThe crude was purified by column chromatography on silica gel (50% EtOAc/Hexane)

Sources & evidence

ORD record: ord-ec73363d320e46d88d70ef91df727b61
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08778951B2

Reaction notes

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