Carbon tetrabromide → 7-(Bromomethyl)-5-(trifluoromethyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazole

HRID 913810Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 913810
[F:1][C:2]([F:23])([F:22])[C:3]1[CH:4]=[C:5]2[C:9](=[C:10]([CH2:12]O)[CH:11]=1)[N:8]([CH2:14][O:15][CH2:16][CH2:17][Si:18]([CH3:21])([CH3:20])[CH3:19])[N:7]=[CH:6]2.C(Br)(Br)(Br)[Br:25].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>O1CCCC1.CCCCC>[Br:25][CH2:12][C:10]1[CH:11]=[C:3]([C:2]([F:23])([F:22])[F:1])[CH:4]=[C:5]2[C:9]=1[N:8]([CH2:14][O:15][CH2:16][CH2:17][Si:18]([CH3:21])([CH3:20])[CH3:19])[N:7]=[CH:6]2

Komponenten

6

Edukt 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 57546212(5-(trifluoromethyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazol-7-yl)methanol

Produkt 1

HCID 575460807-(Bromomethyl)-5-(trifluoromethyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazole

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8003PentaneLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of (5-(trifluoromethyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazol-7-yl)methanol (980 mg, 2.83 mmol) and carbon tetrabromide (1.41 g, 4.24 mmol) in tetrahydrofuran (10 mL) at 0° C. was added triphenylphosphine (1.11 g, 4.24 mmol). The resulting solution was stirred at room temperature for 30 min. The reaction was diluted with several volumes of pentane and filtered to remove undissolved solids. The organics were concentrated and purified by column chromatography (4%→8% EtOAc/Hex) to give 1.155 g (100%) as a colorless oil. 1H-NMR (CDCl3, 500 MHz) δ 8.12 (s, 1H), 8.03 (s, 1H), 7.61 (d, J=1.2 Hz, 1H), 6.05 (s, 2H), 5.01 (s, 2H), 3.52 (m, 2H), 0.87 (m, 2H), −0.08 (s, 9H); 13C-NMR (CDCl3, 126 MHz) δ 138.4, 135.1, 126.4, 125.7, 124.4 (q, J=33 Hz), 124.3 (q, J=273 Hz), 122.5, 120.1, 80.5, 66.6, 29.7, 17.9, −1.4.

Aufarbeitung

  1. filtrationfiltered
  2. customto remove undissolved solids
  3. concentrationThe organics were concentrated
  4. custompurified by column chromatography (4%→8% EtOAc/Hex)
  5. customto give 1.155 g (100%) as a colorless oil

Quellen und Nachweise

ORD-Eintrag
ord-3975202e75944dfe8cd47e698fddb119
Quelldatensatz
uspto-grants-2011_09
Patentnummer
US08026257B2

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