Reaktion #494006

Reaktionsgleichung

2-chloro-4-phenylquinazoline

methyl 4-amino-3-methylbenzoate

Water

→

methyl 3-methyl-4-(4-phenylquinazolin-2-ylamino)benzoate

Ausbeute 79.6%

Lösungsmittel

n-butanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturcooled to rt
2. 2
   Filtrationthe product collected by filtration

Vorschrift

A mixture of 2-chloro-4-phenylquinazoline (200 mg, 0.83 mmol) and methyl 4-amino-3-methylbenzoate (137 mg, 0.83 mmol) in n-butanol was heated to 160° C. for 1 h and then cooled to rt. Water (10 mL) was added and the product collected by filtration to give the methyl 3-methyl-4-(4-phenylquinazolin-2-ylamino)benzoate (244 mg, 79%), which was dissolved in a 1:1 mixture of water and methanol (10 mL) containing sodium hydroxide (100 mg, 2.5 mmol). The mixture was heated to 60° C. overnight. Ethyl acetate (100 mL) was added and the phases were separated. The aqueous layer was acidified with 10% aqueous hydrochloric acid and extracted with ethyl acetate. The organic extracts were dried over sodium sulfate, filtered and concentrated on a rotary evaporator to give 3-methyl-4-(4-phenylquinazolin-2-ylamino)benzoic acid (188 mg, 80%).

Quelle