Methyl Acrylate → (E)-methyl 3-((Z)-2-oxo-5-phenyl-2,3-dihydro-1H-benzo[e][1,4]diazepin-8-yl)acrylate

HRID 1946611Notes

Reaction equation

HRID 1946611 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2=[C:6]([CH:19]=1)[NH:7][C:8](=[O:18])[CH2:9][N:10]=[C:11]2[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.[C:20]([O:24][CH3:25])(=[O:23])[CH:21]=[CH2:22].C(N(CC)CC)C>CN(C=O)C.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]>[O:18]=[C:8]1[NH:7][C:6]2[CH:19]=[C:2](/[CH:22]=[CH:21]/[C:20]([O:24][CH3:25])=[O:23])[CH:3]=[CH:4][C:5]=2[C:11]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[N:10][CH2:9]1

Participants

6

Reactant 3

HCID 7294Methyl AcrylateHCID 8471TriethylamineHCID 59783468(Z)-8-bromo-5-phenyl-1H-benzo[e][1,4]diazepin-2(3H)-one

Product 1

HCID 59783859(E)-methyl 3-((Z)-2-oxo-5-phenyl-2,3-dihydro-1H-benzo[e][1,4]diazepin-8-yl)acrylateYield 33%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 6228DimethylformamideSolvent

Procedure

Title compound 354 (400 mg, 1.28 mmol), methyl acrylate (132 mg, 1.54 mmol), Pd2(dba)3 (16 mg, 0.038 mmol), POT (24 mg, 0.07 mmol) and triethylamine (0.446 mL, 3.2 mmol) were mixed in DMF (15 mL). The mixture was degassed with nitrogen for 5 minutes and the reaction mixture was heated to 100 oC for 2 hours. The DMF was removed and the residue was partitioned between ethyl acetate and water. The 2 layers were split and the aqueous layer was extracted with 2 other portions of ethyl acetate. The combined organic layers were washed with brine, dried over MgSO4, filtered and evaporated. The crude product was purified by flash chromatography (50% to 65% ethyl acetate in hexanes) to afford title compound 355 (135 mg, 33%) as a light yellow solid. 1H NMR (DMSO-d6) δ (ppm): 10.56 (s, 1H), 7.77 (d, J=8.4 Hz, 2H), 7.68 (d, J=16.0 Hz, 1H), 7.58-7.54 (m, 1H), 7.49 (d, J=8.4 Hz, 2H), 7.24 (d, J=6.4 Hz, 2H), 7.16 (td, J=7.5, 1.0 Hz, 1H), 6.70 (d, J=16.2 Hz, 1H), 4.12 (s, 2H), 3.72 (s, 3H).

Workup

  1. customThe mixture was degassed with nitrogen for 5 minutes
  2. temperaturethe reaction mixture was heated to 100 oC for 2 hours
  3. customThe DMF was removed
  4. customthe residue was partitioned between ethyl acetate and water
  5. customThe 2 layers were split
  6. extractionthe aqueous layer was extracted with 2 other portions of ethyl acetate
  7. washThe combined organic layers were washed with brine
  8. dry with materialdried over MgSO4
  9. filtrationfiltered
  10. customevaporated
  11. customThe crude product was purified by flash chromatography (50% to 65% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-21bc9e4d6ee840d1810d4b63e4a03549
Source dataset
uspto-grants-2013_03
Patent number
US08399452B2

Reaction notes

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