Cesium carbonate → (E)-ethyl 3-(5-(benzylthio)-2-((5-bromo-2-methoxyphenyl)amino)phenyl)acrylate

HRID 1504436Notes

Reaction equation

[Br:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][CH3:9])=[C:4](I)[CH:3]=1.[NH2:11][C:12]1[CH:17]=[CH:16][C:15]([S:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[CH:14][C:13]=1/[CH:26]=[CH:27]/[C:28]([O:30][CH2:31][CH3:32])=[O:29].C(=O)([O-])[O-].[Cs+].[Cs+]>COC1CCCC1.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]>[CH2:19]([S:18][C:15]1[CH:16]=[CH:17][C:12]([NH:11][C:4]2[CH:3]=[C:2]([Br:1])[CH:7]=[CH:6][C:5]=2[O:8][CH3:9])=[C:13](/[CH:26]=[CH:27]/[C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH:14]=1)[C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1

Participants

Conditions

Temperature: 90 °C

Procedure

4-Bromo-2-iodo-1-methoxybenzene (6.07 g, 19.40 mmol), (E)-ethyl 3-(2-amino-5-(benzylthio)phenyl)acrylate (5.066 g, 16.16 mmol), Pd2(dba)3 (0.370 g, 0.404 mmol), Xntphos (0.468 g, 0.808 mmol) and cesium carbonate (7.37 g, 22.63 mmol) were combined in CPME (32.3 ml) and the reaction was heated to 90° C. overnight. The reaction was cooled to RT, diluted with EtOAc and filtered over a pad of Celite (washing with EtOAc). The filtrate was concentrated in vacuo and the crude oil was then taken up in DCM and purified via MPLC, eluting with 0-20% ethyl acetate in heptanes to yield (E)-ethyl 3-(5-(benzylthio)-2-((5-bromo-2-methoxyphenyl)amino)phenyl)acrylate (6.92 g, 13.88 mmol, 86% yield) as a yellow solid. MS (ESI, pos. ion) m/z: [M+1] 498.0

Workup

temperatureThe reaction was cooled to RT
filtrationfiltered over a pad of Celite (washing with EtOAc)
concentrationThe filtrate was concentrated in vacuo
custompurified via MPLC
washeluting with 0-20% ethyl acetate in heptanes

Sources & evidence

ORD record: ord-c65dc5b665e646028d9ccb183b65b935
Source dataset: uspto-grants-2015_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09212182B2

Reaction notes

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