1,2-Dimethoxyethane → 2-(4-Vinylphenylamino)isoindoline-1,3-dione

HRID 587257Notes

Reaction equation

Br[C:2]1[CH:7]=[CH:6][C:5]([NH:8][N:9]2[C:17](=[O:18])[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[C:10]2=[O:19])=[CH:4][CH:3]=1.C([O-])([O-])=O.[K+].[K+].CO[CH2:28][CH2:29]OC>O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:28]([C:2]1[CH:7]=[CH:6][C:5]([NH:8][N:9]2[C:17](=[O:18])[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[C:10]2=[O:19])=[CH:4][CH:3]=1)=[CH2:29]

Participants

Conditions

Temperature: 150 °C

Procedure

To a solution of 2-(4-bromophenylamino)isoindoline-1,3-dione (2 g, 6 mmol) in 1,2-dimethoxyethane (20 mL) and water (4 mL) were added vinyl boronic anhydride pyridine complex (4.57 g, 18.98 mmol) and K2CO3 (1.3 g, 9.5 mmol) followed by Pd(PPh3)4 (0.219 g, 0.189 mmol). The resultant reaction mixture was heated at 150° C. in a microwave for 30 min and then was concentrated under reduced pressure. Purification by column chromatography (SiO2, 15% EtOAc in petroleum ether) afforded the title compound as a solid (200 mg, 13%): mp 174-176° C.; 1H NMR (400 MHz, CDCl3) δ 8.65 (s, 1H), 7.94 (m, 4H), 7.29 (d, J=8.4 Hz, 2H), 6.72 (d, J=8.4 Hz, 2H), 6.61 (m, 1H), 5.61 (d, J=17.6 Hz, 1H), 5.05 (d, J=11.2 Hz, 1H); ESIMS m/z 263.18 ([M−H]−).

Workup

customThe resultant reaction mixture
concentrationwas concentrated under reduced pressure
customPurification by column chromatography (SiO2, 15% EtOAc in petroleum ether)

Sources & evidence

ORD record: ord-31aa7ef72bce42d094a463e86fd31293
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09226500B2

Reaction notes

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