Methanol → Methyl 11-bromoundecanoate

HRID 653348

Reaktionsgleichung

Reaktionsgleichung von HRID 653348
[Br:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][C:12]([OH:14])=[O:13].[Cl-].[Ca+2].[Cl-].[CH3:18]O>>[Br:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][C:12]([O:14][CH3:18])=[O:13]

Komponenten

4

Edukt 3

HCID 887MethanolHCID 1781211-Bromoundecanoic acidHCID 5284359Calcium Chloride

Produkt 1

HCID 223913Methyl 11-bromoundecanoateAusbeute 84 %

Versuchsvorschrift

11-Bromoundecanoic acid (commercial material, 25.0 g, 94 mmol), Duolite H+ resin (10 g), calcium chloride (26.2 g, 94 mmol) and methanol (700 ml) were stirred for 15 h. The methanol was removed and dichloromethane was added. The mixture was washed with water, dried (Na2SO4) and concentrated. Distillation gave pure 103 (22.0 g, 84%) with b.p. 103°-104° (2×10-2 torr). 1H-NMR (CDCl3, Me4Si) δ 3.67 (s, 3H, MeO), 3.41 (t, 2H, J=6.8 Hz, Br--CH2), 2.31 (t, 2H, J=7.3 Hz, CH2CO).

Aufarbeitung

  1. customThe methanol was removed
  2. additiondichloromethane was added
  3. washThe mixture was washed with water
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated
  6. distillationDistillation

Quellen und Nachweise

ORD-Eintrag
ord-602b2bdb47f54c15b743da6bba95f29f
Quelldatensatz
uspto-grants-1987_06
Patentnummer
US04675392

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