تفاعل #58933

معادلة التفاعل

4-nitrophenol

4-chloromethyl-2-ethyl-1,3-thiazole

potassium carbonate

N,N-dimethylformamide

→

2-ethyl-4-[(4-nitrophenoxy)methyl]-1,3-thiazole

المردود 35.0%

المذيبات

Water

ظروف التفاعل

المعالجة

1. 1
   استخلاصthe mixture was extracted with ethyl acetate
2. 2
   غسيلThe organic layer was washed successively with 1N aqueous sodium hydroxide solution and saturated brine
3. 3
   تجفيفdried over anhydrous magnesium sulfate
4. 4
   تركيزconcentrated

الإجراء التجريبي

A mixture of 4-nitrophenol (5.48 g), 4-chloromethyl-2-ethyl-1,3-thiazole (7.40 g), potassium carbonate (5.45 g) and N,N-dimethylformamide (50 mL) was stirred at room temperature for 15 hrs. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed successively with 1N aqueous sodium hydroxide solution and saturated brine, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to give 2-ethyl-4-[(4-nitrophenoxy)methyl]-1,3-thiazole as colorless crystals (3.60 g, yield 35%) from a fraction eluted with hexane-ethyl acetate (4:1, v/v). Recrystallization thereof from ethyl acetate-hexane gave colorless prism crystals. melting point: 79-80° C.

المصدر