Reaktion #559282

Reaktionsgleichung

acetic acid

NaOH

benzyl chloroformate

4-amino-3-methylbenzoic acid

→

title compound

Ausbeute 68.1%

4-Benzyloxycarbonylamino-3-methyl-benzoic acid

Ausbeute 68.1%

Lösungsmittel

water

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationthe solids collected by filtration
2. 2
   WaschenThe filter cake was rinsed with water
3. 3
   WaschenThe organic was washed with brine
4. 4
   Trocknendried over MgSO4
5. 5
   Filtrationfiltered
6. 6
   Einengenconcentrated
7. 7
   SonstigeThe resulting solid was dried under vacuum

Vorschrift

A mixture of 4-amino-3-methylbenzoic acid (35.1 g, 232 mmol) in water (400 mL) was treated with 2.5N NaOH (200 mL, 500 mmol) and benzyl chloroformate (37.0 mL, 259 mmol). After 1 h, 150 mL water was added, the resulting mixture was treated with glacial acetic acid (15 mL) and the solids collected by filtration. The filter cake was rinsed with water and the resulting solid taken up in ethyl acetate/2-methyl tetrahydrofuran. The organic was washed with brine, dried over MgSO4, filtered and concentrated. The resulting solid was dried under vacuum to give 45.1 g of the title compound. LCMS m/z=307.9 MH+, Rt=2.508 min.

Quelle