تفاعل #73704

معادلة التفاعل

p-cresol

acetyl chloride

hydrochloric acid

→

p-tolyl acetate

المردود 93.0%

المذيبات

pyridine

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةwas refluxed for 1.5 h
2. 2
   استخلاصThe product was extracted with 2×100 mL of diethyl ether
3. 3
   استخلاصthe combined extract
4. 4
   غسيلwas washed with 2% NaOH
5. 5
   تجفيفdried over Na2SO4
6. 6
   أخرىevaporated to dryness
7. 7
   أخرىDrying the residue in vacuum

الإجراء التجريبي

A mixture of 65.0 g (0.60 mol) of p-cresol, 51.8 g (0.66 mol) of acetyl chloride, and 6 mL of anhydrous pyridine was refluxed for 1.5 h and then added to 600 mL of 2% hydrochloric acid. The product was extracted with 2×100 mL of diethyl ether, the combined extract was washed with 2% NaOH, then dried over Na2SO4, and evaporated to dryness. Drying the residue in vacuum gave 83.7 g (93%) of p-tolyl acetate (bp 104-105° C./25 mm Hg). A mixture of 40.0 g (0.27 mol) of p-tolyl acetate and 45.0 (0.34 mol) of AlCl3 was slowly heated to 120-125° C. for 30 min. The mixture was stirred for 1 hr and then 500 mL of 2M HCl was added at 0° C. The product was extracted with 3×100 mL of diethyl ether, the combined extract was dried over Na2SO4 and then evaporated to dryness. This gave 39.7 g (99%) of the title product which was further used without an additional purification.

المصدر