تفاعل #459360

معادلة التفاعل

potassium hydroxide

Allyl bromide

cyclohexanedione

sodium hydroxide

→

2-Allyl-1,3-cyclohexanedione

المذيبات

ethyl acetate

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONthe reaction was mixed with 1500 ml
2. 2
   ترشيحof ethyl ether, filtered
3. 3
   أخرىA brown solid (188 g.) formed upon refrigeration at 0° C
4. 4
   غسيلthe solution was washed with water (3 × 150 ml.)
5. 5
   تجفيفdried (MgSO4)
6. 6
   workup.ADDITIONtreated with charcoal, and condensed until turbid
7. 7
   درجة الحرارةUpon cooling
8. 8
   أخرى(57%) of 2-allyl-1,3-cyclohexanedione was collected

الإجراء التجريبي

Allyl bromide (195 g., 1.62 mol.) was added over a 15 minute period to a stirred ice-cold mixture of cyclohexanedione (165 g., 1.47 mol.), copperbronze (4.5 g.), and 330 ml. of 20% by weight aqueous potassium hydroxide. After 6 hours, the reaction was mixed with 1500 ml. of a 5% by weight aqueous sodium hydroxide solution and 1000 ml. of ethyl ether, filtered and the separated water layer acidified with 4N aqueous hydrochloric acid to pH 1. A brown solid (188 g.) formed upon refrigeration at 0° C. The solid was taken up in ethyl acetate and the solution was washed with water (3 × 150 ml.), dried (MgSO4), treated with charcoal, and condensed until turbid. Upon cooling, 126 g. (57%) of 2-allyl-1,3-cyclohexanedione was collected, m.p. 125°-127° C.

المصدر