Water → 3-Chloro-4-(2-trimethylsilylethoxymethoxy)benzaldehyde

HRID 28393

Reaktionsgleichung

Reaktionsgleichung von HRID 28393
[Cl:1][C:2]1[C:3]([OH:10])=[CH:4][CH:5]=[C:6]([CH:9]=1)[CH:7]=[O:8].C(N(C(C)C)CC)(C)C.[CH3:20][Si:21]([CH3:28])([CH3:27])[CH2:22][CH2:23][O:24][CH2:25]Cl.O>C(Cl)Cl>[Cl:1][C:2]1[CH:9]=[C:6]([CH:5]=[CH:4][C:3]=1[O:10][CH2:25][O:24][CH2:23][CH2:22][Si:21]([CH3:28])([CH3:27])[CH3:20])[CH:7]=[O:8]

Komponenten

6

Edukt 4

HCID 962WaterHCID 170223-Chloro-4-hydroxybenzaldehydeHCID 81531DiisopropylethylamineHCID 27242712-Chloromethyl 2-(trimethylsilyl)ethyl ether

Produkt 1

HCID 865914053-Chloro-4-(2-trimethylsilylethoxymethoxy)benzaldehyde

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

5 g (31.93 mmol) of 5-chloro-4-hydroxybenzaldehyde are dissolved in 300 ml of methylene chloride and 6.7 ml (38.3 mmol) of N,N-diisopropyl-N-ethylamine and 5.9 ml (33.52 mmol) of 2-trimethylsilylethoxymethyl chloride (SEMCl) are added to this at 0° C. The mixture is allowed to return to room temperature and stirred overnight. Water is then added and the mixture is extracted with methylene chloride. The organic phase is dried and the solvent is evaporated off. The product of the title is obtained, which is purified by chromatography on a silica gel column, eluting with a 95/5 and then 9/1 heptane/ethyl acetate mixture.

Aufarbeitung

  1. customto return to room temperature
  2. extractionthe mixture is extracted with methylene chloride
  3. customThe organic phase is dried
  4. customthe solvent is evaporated off
  5. customThe product of the title is obtained
  6. customwhich is purified by chromatography on a silica gel column
  7. washeluting with a 95/5

Quellen und Nachweise

ORD-Eintrag
ord-df80d05eca0843ef96b1d0374c0d5837
Quelldatensatz
uspto-grants-2008_09
Patentnummer
US07419974B2

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