Benzenemethanamine, 2,5-dichloro- → 4-Chloro-6-(2,5-dichloro-benzylamino)-2H-phthalazin-1-one

HRID 1803517Notes

Reaction equation

HRID 1803517 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8](=[O:12])[NH:7][N:6]=[C:5]2[Cl:13].[Cl:14][C:15]1[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][C:16]=1[CH2:17][NH2:18].C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.CC([O-])(C)C.[Na+]>CC(N(C)C)=O.CCOC(C)=O.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[Cl:13][C:5]1[C:4]2[C:9](=[CH:10][CH:11]=[C:2]([NH:18][CH2:17][C:16]3[CH:19]=[C:20]([Cl:23])[CH:21]=[CH:22][C:15]=3[Cl:14])[CH:3]=2)[C:8](=[O:12])[NH:7][N:6]=1

Participants

8

Reactant 4

HCID 457600Benzenemethanamine, 2,5-dichloro-HCID 634876Binap, (A+-)-HCID 23676156Sodium t-butoxideHCID 533084876-Bromo-4-chlorophthalazin-1(2H)-one

Product 1

HCID 584473244-Chloro-6-(2,5-dichloro-benzylamino)-2H-phthalazin-1-one

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 8857Ethyl AcetateSolventHCID 31374DimethylacetamideSolvent

Procedure

A mixture 6-bromo-4-chloro-2H-phthalazin-1-one (150 mg, 0.58 mmol), 2,5-dichloro-benzylamine (0.085 mL, 0.64 mmol), Pd2(dba)3 (53 mg, 0.058 mmol), rac-BINAP (108 mg, 0.17 mmol) and NaOt-Bu (140 mg, 1.45 mmol) in DMA (6 mL) was heated at 80° C. for 1 h. The mixture was allowed to cool, diluted with EtOAc (25 mL) and washed with water (25 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. Chromatography on silica (EtOAc/hexanes) yielded the title compound. 4-Chloro-6-(2,5-dichloro-benzylamino)-2H-phthalazin-1-one: 6 mg (2.9%): m/z (M+H)=354. 1H-NMR (DMSO-d6) δ: 12.39 (s, 1H), 7.96 (d, 1H), 7.66 (m, 1H), 7.53 (d, 1H), 7.47 (m, 1H), 7.40 (dd, 1H), 7.16 (dd, 1H), 6.82 (s, 1H), 4.50 (d, 2H).

Workup

  1. temperatureto cool
  2. washwashed with water (25 mL)
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-366c2b0e6593435192fd9bae19884dd9
Source dataset
uspto-grants-2013_01
Patent number
US08349836B2

Reaction notes

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