Bromine → HCID 10297816, Verbindung

HRID 1069238Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1069238
[CH3:1][C:2]1[S:6][C:5]2[CH:7]=[C:8]3[C:13](=[C:14]([C:15]4[CH:20]=[C:19]([CH3:21])[C:18]([O:22][C:23](=[O:25])[CH3:24])=[C:17]([CH3:26])[CH:16]=4)[C:4]=2[C:3]=1[CH3:27])[CH:12]=[CH:11][CH:10]=[CH:9]3.[Br:28]Br>C(Cl)Cl>[Br:28][C:7]1[C:5]2[S:6][C:2]([CH3:1])=[C:3]([CH3:27])[C:4]=2[C:14]([C:15]2[CH:16]=[C:17]([CH3:26])[C:18]([O:22][C:23](=[O:25])[CH3:24])=[C:19]([CH3:21])[CH:20]=2)=[C:13]2[C:8]=1[CH:9]=[CH:10][CH:11]=[CH:12]2

Komponenten

4

Edukt 2

HCID 24408BromineHCID 10199432HCID 10199432, Verbindung

Produkt 1

HCID 10297816HCID 10297816, VerbindungAusbeute 55,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

A solution of acetic acid 4-(2,3-dimethyl-naphtho[2,3-b]thiophen-4-yl)-2,6-dimethyl-phenyl ester (10.0 g, 26.7 mmol) and ferric chloride (0.23 g, 1.4 mmol) in anhydrous methylene chloride (231 mL) was placed at −78 C. under nitrogen. The reaction mixture was protected from light and a solution of bromine (1.5 mL, 29.4 mmol) in anhydrous methylene chloride (38 mL) was added dropwise over a period of 50 min. After 30 min the reaction was quenched with dilute sodium bisulfite, diluted with water, and the resulting mixture was extracted with diethyl ether. The diethyl ether layer was washed twice with water, brine, and then dried (MgSO4). Concentration under reduced pressure and chromatography with petroleum ether:ethyl acetate (97:3, then 95:5) gave the title compound as a white solid (6.7 g, 55%): NMR (DMSO-d6): δ8.27 (d, 1H), 7.60 (d, 1H), 7.56-7.52 (ddd, 1H), 7.38-7.34 (ddd, 1H), 7.06 (s, 2H), 2.43 (s, 3H), 2.41 (s, 3H), 2.22 (s, 6H), 1.64 (s, 3H); MS(EI): [M+], 1 bromine isotope pattern, 452/454; Anal. Calc. for C24H21BrO2S: C, 63.58; H, 4.67; N, 0.00. Found: C, 63.41; H, 4.45; N, 0.08.

Aufarbeitung

  1. customAfter 30 min the reaction was quenched with dilute sodium bisulfite
  2. additiondiluted with water
  3. extractionthe resulting mixture was extracted with diethyl ether
  4. washThe diethyl ether layer was washed twice with water, brine
  5. dry with materialdried (MgSO4)
  6. concentrationConcentration under reduced pressure and chromatography with petroleum ether:ethyl acetate (97:3

Quellen und Nachweise

ORD-Eintrag
ord-c5a5679f2c934ad0aae192d1c045485f
Quelldatensatz
uspto-grants-2001_06
Patentnummer
US06251936B1

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