Acrylonitrile → Dimethyl 4-(2-cyanovinyl)isophthalate

HRID 715999

Reaktionsgleichung

Reaktionsgleichung von HRID 715999
Br[C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][C:3]=1[C:12]([O:14][CH3:15])=[O:13].[C:16](#[N:19])[CH:17]=[CH2:18].C1(CNCC2CCCCC2)CCCCC1.C(P(C(C)(C)C)C(C)(C)C)(C)(C)C>C(OCC)(=O)C.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].C(OCC)(=O)C.CCCCCC.O1CCOCC1>[C:16]([CH:17]=[CH:18][C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][C:3]=1[C:12]([O:14][CH3:15])=[O:13])#[N:19]

Komponenten

9

Edukt 4

HCID 7855AcrylonitrileHCID 83681Tris(1,1-dimethylethyl)phosphineHCID 2824912Dimethyl 4-bromoisophthalateHCID 4594378Bis(cyclohexylmethyl)amine

Produkt 1

HCID 66819156Dimethyl 4-(2-cyanovinyl)isophthalate

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 9811564Bis(dibenzylideneacetone)palladiumKatalysatorHCID 8857Ethyl AcetateLösungsmittelHCID 312751,4-DioxaneLösungsmittelHCID 21226206Ethyl acetate hexaneLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A microwave vial was charged with dimethyl 4-bromoisophthalate (Example 88A, 500 mg, 1.83 mmol), acrylonitrile (117 mg, 2.20 mmol), N,N-dicyclohexylmethylamine (429 mg, 2.20 mmol), tri-tert-butylphosphine (0.11 mL, 0.11 mmol, 1.0 M in toluene), tris(dibenzylideneacetone)dipalladium(0) (50.3 mg, 0.055 mmol), and 1,4-dioxane (1.4 mL) under nitrogen. The reaction mixture was heated to 80° C. in an oil bath for 4 hours. Reaction was complete as indicated by thin layer chromatography (40% ethyl acetate/hexane). The reaction mixture was cooled to room temperature and diluted with ethyl acetate. Filtration removed HBr salts. The filtrate was concentrated. The residue was triturated with ethyl acetate/hexane (1:6) to provide dimethyl 4-(2-cyanovinyl)isophthalate as a mixture of trans and cis isomers (ratio 5.5:1) which was used in next step without further purification.

Aufarbeitung

  1. customReaction
  2. temperatureThe reaction mixture was cooled to room temperature
  3. filtrationFiltration
  4. customremoved HBr salts
  5. concentrationThe filtrate was concentrated
  6. customThe residue was triturated with ethyl acetate/hexane (1:6)

Quellen und Nachweise

ORD-Eintrag
ord-200f89808d2f43f8a0ad7abb8773d235
Quelldatensatz
uspto-grants-2015_11
Patentnummer
US09187483B2

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