Pyridine → HCID 178487221, Verbindung

HRID 1762571Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1762571
N1C=CC=CC=1.[CH3:7][S:8](Cl)(=[O:10])=[O:9].[CH3:12][O:13][C:14]1[CH:15]=[CH:16][C:17]2[CH:20]=[C:19]([CH2:21][OH:22])[C:18]=2[CH:23]=1>ClCCl>[CH3:12][O:13][C:14]1[CH:15]=[CH:16][C:17]2[CH:20]=[C:19]([CH2:21][O:22][S:8]([CH3:7])(=[O:10])=[O:9])[C:18]=2[CH:23]=1

Komponenten

5

Edukt 3

HCID 1049PyridineHCID 31297Methanesulfonyl chlorideHCID 23044250HCID 23044250, Verbindung

Produkt 1

HCID 178487221HCID 178487221, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

6.1 ml (76 mmol) of pyridine and 3.6 ml (46 mmol) of methanesulphonic acid chloride are added at 0° C., while stirring, with the exclusion of moisture, to 5.0 g (30.5 mmol) of (5-methoxybenzocyclobuten-1-yl)-methanol in 50 ml of dichloromethane. The mixture is then stirred at room temperature for a further 18 hours to complete the reaction 50 ml of ice-water are then added and the whole is stirred for 30 minutes. The organic phase is separated off, washed once in each case with 2N sodium hydroxide solution, 2N hydrochloric acid and water, dried over sodium sulphate and concentrated under reduced pressure. Methanesulphonic acid (5-methoxybenzocyclobuten-1-ylmethyl) ester is obtained in the form of a viscous oil, Rf=0.4, toluene/ethyl acetate (9:1).

Aufarbeitung

  1. additionare then added
  2. stirringthe whole is stirred for 30 minutes
  3. customThe organic phase is separated off
  4. washwashed once in each case with 2N sodium hydroxide solution, 2N hydrochloric acid and water
  5. dry with materialdried over sodium sulphate
  6. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-9f95fbf3c09649bba2cdbaab75ff1467
Quelldatensatz
uspto-grants-1989_05
Patentnummer
US04833169

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