Potassium Carbonate → 4-Methyl-3-(1-(3-oxopiperazin-1-yl)phthalazin-6-yl)benzamide

HRID 2357584Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8]([N:12]1[CH2:17][CH2:16][NH:15][C:14](=[O:18])[CH2:13]1)=[N:7][N:6]=[CH:5]2.[CH3:19][C:20]1[CH:28]=[CH:27][C:23]([C:24]([NH2:26])=[O:25])=[CH:22][C:21]=1B1OC(C)(C)C(C)(C)O1.C(=O)([O-])[O-].[K+].[K+]>COCCOC.CCO.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:19][C:20]1[CH:28]=[CH:27][C:23]([C:24]([NH2:26])=[O:25])=[CH:22][C:21]=1[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8]([N:12]1[CH2:17][CH2:16][NH:15][C:14](=[O:18])[CH2:13]1)=[N:7][N:6]=[CH:5]2

Participants

Conditions

Temperature: 90 °C

Procedure

A mixture of 4-(6-bromophthalazin-1-yl)piperazin-2-one (0.1 g, 0.3 mmol), 4-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide (0.09 g, 0.3 mmol), and tetrakis(triphenylphosphine)palladium (0.02 g, 0.02 mmol) in 5 mL DME/EtOH (4:1) was treated with 2M potassium carbonate (0.5 mL, 1.0 mmol). The mixture resulted was warmed up to 90° C. and stirred for 1 h under nitrogen. The mixture was cooled down to room temperature, and the crude product was purified via flash chromatography (silica gel) eluting with a gradient of 4% 2 M ammonia in MeOH/DCM to 6% 2 M ammonia in MeOH/DCM to give the title compound (60 mg) as a pale yellow solid. Found MS (ES+): 362(M+H)+.

Workup

customThe mixture resulted
temperatureThe mixture was cooled down to room temperature
customthe crude product was purified via flash chromatography (silica gel)
washeluting with a gradient of 4% 2 M ammonia in MeOH/DCM to 6% 2 M ammonia in MeOH/DCM

Sources & evidence

ORD record: ord-23dcfc1281524dfc9abcfb8a0b603be7
Source dataset: uspto-grants-2010_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07759337B2

Reaction notes

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