Ethyl Acrylate → HCID 68415900, compound

HRID 1879984Notes

Reaction equation

Br[C:2]1[CH:12]=[N:11][C:5]2[NH:6][CH2:7][CH2:8][CH2:9][O:10][C:4]=2[CH:3]=1.[C:13]([O:17][CH2:18][CH3:19])(=[O:16])[CH:14]=[CH2:15].C(N(C(C)C)CC)(C)C.CC1C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>C(#N)CC.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH2:18]([O:17][C:13](=[O:16])[C:14]([C:2]1[CH:12]=[N:11][C:5]2[NH:6][CH2:7][CH2:8][CH2:9][O:10][C:4]=2[CH:3]=1)=[CH2:15])[CH3:19]

Participants

Conditions

Temperature: 100 °C

Procedure

A solution of 3-bromo-6,7,8,9-tetrahydro-5-oxa-1,9-diaza-benzocycloheptene (1.1 g, 4.80 mmol), ethyl acrylate (1.5 mL, 14.4 mmol) and diisopropylethylamine (2.5 mL, 14.4 mmol) in propionitrile (100 mL) was purged with an Argon stream for 10 min. Pd(OAc)2 (108 mg, 048 mmol) and P(o-Tol)3 (292 g, 0.96 mmol) were added and the Argon purge was repeated. The mixture was stirred at 100° C. for 8 h under Argon. Upon cooling, the resultant mixture was filtered through celite; the filtrate was evaporated. The crude product was purified by chromatography (silica, 0-2% MeOH in CH2Cl2) to afford the title compound (0.753 g, 63%). 1H NMR (300 MHz, DMSO-d6, 6): 7.98 (d, J=1.9 Hz, 1H), 7.52 (d, J=1.9 Hz, 1H), 7.51 (d, J=16 Hz, 1H), 6.83 (s, br, 1H), 6.42 (d, J=16 Hz, 1H), 4.15 (m, 4H), 3.34 (m, 2H), 1.98 (m, 2H), 1.25 (t, J=7.2 Hz, 3H).

Workup

customthe Argon purge
temperatureUpon cooling
filtrationthe resultant mixture was filtered through celite
customthe filtrate was evaporated
customThe crude product was purified by chromatography (silica, 0-2% MeOH in CH2Cl2)

Sources & evidence

ORD record: ord-7688d96fad6949759ae770e4f9e0f22f
Source dataset: uspto-grants-2012_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08318720B2

Reaction notes

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