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Benzylamine → 3-[5-Chloro-2-oxo-3-[(phenylmethyl)amino]-1(2H)-pyrazinyl]-N-cyclopropyl-4-methyl-benzamide

HRID 2070711
Notes
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Reaction equation

HRID 2070711 reaction equation
Br[C:2]1[C:3](=[O:20])[N:4]([C:9]2[CH:10]=[C:11]([CH:16]=[CH:17][C:18]=2[CH3:19])[C:12]([O:14]C)=O)[CH:5]=[C:6](Br)[N:7]=1.[CH2:21]([NH2:28])[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.[CH:29]1([NH2:32])[CH2:31][CH2:30]1.C([Mg][Cl:37])(C)C>O1CCCC1.[Pd].C(O)=O.C(O)C.C(N(CC)CC)C>[Cl:37][C:6]1[N:7]=[C:2]([NH:28][CH2:21][C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[C:3](=[O:20])[N:4]([C:9]2[CH:10]=[C:11]([CH:16]=[CH:17][C:18]=2[CH3:19])[C:12]([NH:32][CH:29]2[CH2:31][CH2:30]2)=[O:14])[CH:5]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

10

Reactant 4

HCID 7504BenzylamineHCID 69828CyclopropylamineHCID 66688740methyl 3-(3,5-dibromo-2-oxopyrazin-1(2H)-yl)-4-methylbenzoateHCID 178418918HCID 178418918, compound

Product 1

HCID 666859923-[5-Chloro-2-oxo-3-[(phenylmethyl)amino]-1(2H)-pyrazinyl]-N-cyclopropyl-4-methyl-benzamide

Reagents, catalysts & solvents 5

HCID 23938
Palladium
Catalyst
HCID 284Formic AcidSolvent
HCID 702EthanolSolvent
HCID 8028TetrahydrofuranSolvent
HCID 8471TriethylamineSolvent

Conditions

Temperature
110 °C

Procedure

To a stirred solution of 3-(3,5-dibromo-2-oxo-2H-pyrazin-1-yl)-4-methyl-benzoic acid, methyl ester (Example 1b, 0.2 g) in tetrahydrofuran (3 mL) within a microwave vial was added triethylamine (76 μL) and benzylamine (64 mg). The reaction was stirred overnight before the addition of cyclopropylamine (0.22 mL) and iso-propylmagnesium chloride (2M in tetrahydrofuran, 1.5 mL) dropwise. After stirring for 30 minutes, ethanol (2 mL), formic acid (0.4 mL) and 10% palladium on carbon (30 mg) were added. The reaction mixture was heated within a microwave for 60 minutes at 110° C. before being cooled to room temperature, filtered and washed with ethanol. The filtrate was concentrated in vacuo. Purification by preparative HPLC (Gemini column, 0.1% ammonia: acetonitrile eluent) afforded the title compound (80 mg).

Workup

  1. temperaturebefore being cooled to room temperature
  2. filtrationfiltered
  3. washwashed with ethanol
  4. concentrationThe filtrate was concentrated in vacuo
  5. customPurification by preparative HPLC (Gemini column, 0.1% ammonia: acetonitrile eluent)

Sources & evidence

ORD record
ord-541025f39bf24b1ab0a1469c52d52c80
Source dataset
uspto-grants-2012_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08299246B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes