Cesium carbonate → (E)-ethyl 3-(5-(benzylthio)-2-((4-bromo-5-fluoro-2-methoxyphenyl)amino)phenyl)-acrylate

HRID 1504462Notes

Reaction equation

HRID 1504462 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([S:8][CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)=[CH:4][C:3]=1/[CH:16]=[CH:17]/[C:18]([O:20][CH2:21][CH3:22])=[O:19].[Br:23][C:24]1[CH:29]=[C:28]([O:30][CH3:31])[C:27](I)=[CH:26][C:25]=1[F:33].C([O-])([O-])=O.[Cs+].[Cs+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>C1(C)C=CC=CC=1.ClCCl.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]>[CH2:9]([S:8][C:5]1[CH:6]=[CH:7][C:2]([NH:1][C:27]2[CH:26]=[C:25]([F:33])[C:24]([Br:23])=[CH:29][C:28]=2[O:30][CH3:31])=[C:3](/[CH:16]=[CH:17]/[C:18]([O:20][CH2:21][CH3:22])=[O:19])[CH:4]=1)[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1

Participants

8

Reactant 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 716561571-Bromo-2-fluoro-4-iodo-5-methoxybenzeneHCID 117740420(E)-Ethyl 3-(2-amino-5-(benzylthio)phenyl)acrylate

Product 1

HCID 117746844(E)-ethyl 3-(5-(benzylthio)-2-((4-bromo-5-fluoro-2-methoxyphenyl)amino)phenyl)-acrylateYield 71%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
110 °C

Procedure

To a solution of (E)-ethyl 3-(2-amino-5-(benzylthio)phenyl)acrylate (300 g, 958.1 mmol, 1.0 equiv) and 1-bromo-2-fluoro-4-iodo-5-methoxybenzene (348.0 g, 1051.6 mmol, 1.1 equiv) in toluene (2.5 L) was added Cs2CO3 (468 g, 1436.3 mmol, 1.5 equiv, Spectrochem) and the mixture was degassed with nitrogen for 20 mins. Pd2(dba)3 (35 g, 38.2 mmol, 0.04 equiv, Hindustan Platinum) and XantPhos (44.6 g, 76.4 mmol, 0.08 equiv, GLR) were added to the reaction mixture and the mixture was heated at 110° C. for 5 h. The reaction mixture was allowed to cool to room temperature, diluted with dichloromethane (2.0 L) and filtered through celite. The filtrate was concentrated under reduced pressure to obtain the crude material which was purified by stirring with 5% ethyl acetate in hexanes (3.0 L) for 30 min and filtered to obtain (E)-ethyl 3-(5-(benzylthio)-2-((4-bromo-5-fluoro-2-methoxyphenyl)amino)phenyl)acrylate (350 g, 71%) as yellow solid. TLC solvent system: 30% ethyl acetate in hexanes. Product's Rf: 0.5. MS (ESI, positive ion) m/z; 516.2 (M+1). 1H NMR (400 MHz, DMSO) δ 7.73-7.61 (m, 3H), 7.34-7.15 (m, 6H), 7.02 (d, J=11.4 Hz, 1H), 6.60 (d, J=21.2 Hz, 1H), 6.33 (d, J=14.1 Hz, 1H), 4.26 (s, 2H), 4.16-4.09 (m, 2H), 3.81 (s, 3H), 1.22 (t, J=7.2 Hz, 3H). Note: NH proton not observed.

Workup

  1. customthe mixture was degassed with nitrogen for 20 mins
  2. temperatureto cool to room temperature
  3. filtrationfiltered through celite
  4. concentrationThe filtrate was concentrated under reduced pressure
  5. customto obtain the crude material which
  6. customwas purified
  7. filtrationfiltered

Sources & evidence

ORD record
ord-c13dc1a7e7fb496e9eb646946ebc2154
Source dataset
uspto-grants-2015_12
Patent number
US09212182B2

Reaction notes

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