Cesium carbonate → Methyl 5-(3-chlorophenyl)nicotinate

HRID 33540

Reaktionsgleichung

Reaktionsgleichung von HRID 33540
[Cl:1][C:2]1[CH:3]=[C:4](B2OC(C)(C)C(C)(C)O2)[CH:5]=[CH:6][CH:7]=1.C(=O)([O-])[O-].[Cs+].[Cs+].[CH3:23][O:24][C:25]([C:27]1[CH:28]=[N:29][CH:30]=[C:31](Br)[CH:32]=1)=[O:26]>C(COC)OC.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>[CH3:23][O:24][C:25](=[O:26])[C:27]1[CH:32]=[C:31]([C:4]2[CH:5]=[CH:6][CH:7]=[C:2]([Cl:1])[CH:3]=2)[CH:30]=[N:29][CH:28]=1

Komponenten

6

Edukt 3

HCID 10796Cesium carbonateHCID 699336Methyl 5-bromopyridine-3-carboxylateHCID 100372252-(3-Chlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

Produkt 1

HCID 20099850Methyl 5-(3-chlorophenyl)nicotinateAusbeute 80,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 80711,2-DimethoxyethaneLösungsmittel

Versuchsvorschrift

104 mg (0.09 mmol)Pd(PPh3)4, 1.5 g (6.29 mmol) of 3-chlorophenylboronic acid pinacol ester 2.86 ml (8.58 mmol) and 3M cesium carbonate solution were added under argon at room temperature to a solution of 1.24 g (5.72 mmol) methyl-5-bromo-pyridine-3-carboxylate in 45 ml dimethoxyethane and the mixture was heated to reflux for 30 min. The reaction mixture was cooled to room temperature and evaporated. The residue was taken up with ethyl acetate, washed with water, dried over sodium sulphate and evaporated. Chromatography on silica (eluent: ethyl acetate/n-heptane 1:3) gave 1.14 g (72%) of 5-(3-Chloro-phenyl)-nicotinic acid methyl ester

Aufarbeitung

  1. temperaturethe mixture was heated
  2. temperatureto reflux for 30 min
  3. customevaporated
  4. washwashed with water
  5. dry with materialdried over sodium sulphate
  6. customevaporated

Quellen und Nachweise

ORD-Eintrag
ord-48cf15a1bb314f92a712ee4b2305e794
Quelldatensatz
uspto-grants-2008_09
Patentnummer
US07429605B2

Verknüpfte Notizen

Wird geladen…