Tri-o-tolylphosphine → (E)-3-(7,7-Dimethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-1,9-diaza-benzocyclohepten-3-yl)-N-(3-methoxy-2-propoxy-benzyl)-N-methylacrylamide

HRID 1879961Notes

Reaction equation

HRID 1879961 reaction equation
Br[C:2]1[CH:15]=[N:14][C:5]2[NH:6][C:7](=[O:13])[C:8]([CH3:12])([CH3:11])[CH2:9][O:10][C:4]=2[CH:3]=1.[CH3:16][O:17][C:18]1[C:19]([O:31][CH2:32][CH2:33][CH3:34])=[C:20]([CH:28]=[CH:29][CH:30]=1)[CH2:21][N:22]([CH3:27])[C:23](=[O:26])[CH:24]=[CH2:25].C(N(C(C)C)C(C)C)C.CC1C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>C(#N)CC.CN(C=O)C.O.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH3:11][C:8]1([CH3:12])[C:7](=[O:13])[NH:6][C:5]2[N:14]=[CH:15][C:2](/[CH:25]=[CH:24]/[C:23]([N:22]([CH2:21][C:20]3[CH:28]=[CH:29][CH:30]=[C:18]([O:17][CH3:16])[C:19]=3[O:31][CH2:32][CH2:33][CH3:34])[CH3:27])=[O:26])=[CH:3][C:4]=2[O:10][CH2:9]1

Participants

9

Reactant 4

HCID 80271Tri-o-tolylphosphineHCID 81531DiisopropylethylamineHCID 57742093N-(3-Methoxy-2-propoxybenzyl)-N-methylacrylamideHCID 593328468-bromo-3,3-dimethyl-2,3-dihydropyrido[3,2-b][1,4]oxazepin-4(5H)-one

Product 1

HCID 24891409(E)-3-(7,7-Dimethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-1,9-diaza-benzocyclohepten-3-yl)-N-(3-methoxy-2-propoxy-benzyl)-N-methylacrylamideYield 45%

Reagents, catalysts & solvents 4

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 7854PropionitrileSolvent

Procedure

To a solution of 3-bromo-7,7-dimethyl-6,7-dihydro-9H-5-oxa-1,9-diaza-benzocyclohepten-8-one (200 mg, 0.738 mmol) in propionitrile (24 mL) and DMF (6 mL) were added N-(3-methoxy-2-propoxy-benzyl)-N-methylacrylamide (253 mg, 0.959 mmol), (i-Pr)2EtN (0.26 mL, 1.5 mmol), Pd(OAc)2 (17 mg, 0.074 mmol) and P(o-tol)3 (45 mg, 0.15 mmol), and the mixture was de-oxygenated with argon for 15 min. The mixture was heated to reflux overnight, allowed to cool and then diluted with water (60 mL). The mixture was extracted with CH2Cl2 (3×50 mL). The combined extracts were washed with water and brine, dried (Na2SO4) and the solvent was removed in vacuo. Purification by column chromatography (silica gel, CH2Cl2/MeOH, 97:3) then by slow precipitation from CH2Cl2/hexanes gave the title compound (150 mg, 45%) as a pale-yellow solid and as a mixture of amide rotamers: 1H NMR (300 MHz, DMSO-d6) δ 10.12-10.10 (m, 1H), 8.28-8.22 (m, 1H), 7.95-7.85 (m, 1H), 7.54-7.47 (m, 1H), 7.33-7.27 (m, 1H), 7.07-6.93 (m, 2H), 6.68-6.61 (m, 1H), 4.80-4.63 (m, 2H), 4.08-4.04 (m, 2H), 3.91-3.84 (m, 2H), 3.79 (s, 3H), 3.10-2.73 (m, 3H), 1.74-1.67 (m, 2H), 1.20-1.17 (m, 6H), 1.01-0.93 (m, 3H); MS (ESI) m/e 454 (M+H)+.

Workup

  1. temperatureThe mixture was heated
  2. temperatureto reflux overnight
  3. temperatureto cool
  4. extractionThe mixture was extracted with CH2Cl2 (3×50 mL)
  5. washThe combined extracts were washed with water and brine
  6. dry with materialdried (Na2SO4)
  7. customthe solvent was removed in vacuo
  8. customPurification by column chromatography (silica gel, CH2Cl2/MeOH, 97:3)
  9. customby slow precipitation from CH2Cl2/hexanes

Sources & evidence

ORD record
ord-69f45829047e4f8fb2652f067aa794dc
Source dataset
uspto-grants-2012_11
Patent number
US08318720B2

Reaction notes

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