tert-Butyldimethylsilyl chloride → 4-Bromo-2-(((tert-butyldimethylsilyl)oxy)methyl)pyridine

HRID 1053783

Reaktionsgleichung

Reaktionsgleichung von HRID 1053783
[Br:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]([CH2:8][OH:9])[CH:3]=1.[C:10]([Si:14](Cl)([CH3:16])[CH3:15])([CH3:13])([CH3:12])[CH3:11]>C(Cl)Cl>[Br:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]([CH2:8][O:9][Si:14]([C:10]([CH3:13])([CH3:12])[CH3:11])([CH3:16])[CH3:15])[CH:3]=1

Komponenten

4

Edukt 2

HCID 28928tert-Butyldimethylsilyl chlorideHCID 14761462(4-Bromopyridin-2-yl)methanol

Produkt 1

HCID 583550294-Bromo-2-(((tert-butyldimethylsilyl)oxy)methyl)pyridineAusbeute 70 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a stirring solution of (4-bromopyridin-2-yl)methanol (1.50 g, 8.0 mmol) in DCM (4 mL) was added tert-butylchlorodimethylsilane (1.20 g, 8.0 mmol) following by TEA (1.60 g, 12.0 mmol). The reaction mixture was stirred at room temperature for 12 h then washed with brine and EA. The combined organic layers were dried over MgSO4, filtered, and concentrated to yield an amber liquid. The crude product was purified by chromatography (EA/Hexanes) to produce 1.67 g (70%) of 4-bromo-2-((tert-butyldimethylsilyloxy)methyl)pyridine INT-70 as a light yellow liquid. LCMS-ESI (m/z) calculated for C12H20BrNOSi: 302.3; found 303.0 [M+H]+, tR=4.87 min (Method 1). 1H NMR (400 MHz, CDCl3) δ 8.30 (d, J=5.3, 1H), 7.68 (dd, J=1.9, 0.7, 1H), 7.35-7.24 (m, 1H), 4.80 (s, 2H), 0.99-0.86 (m, 9H), 0.16-0.06 (m, 6H).

Aufarbeitung

  1. washthen washed with brine and EA
  2. dry with materialThe combined organic layers were dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customto yield an amber liquid
  6. customThe crude product was purified by chromatography (EA/Hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-b9e6ce65af5442439becdfbe4747c222
Quelldatensatz
uspto-grants-2016_07
Patentnummer
US09394264B2

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