تفاعل #2458887

معادلة التفاعل

4-(5H-dibenzo[a,d]cyclohepten-5-ylidene)-1-methylpiperidine

ethyl chlorocarbonate

→

pale yellow crystals

المردود 94.3%

Ethyl 4-(5H-dibenzo[a,d]cyclohepten-5-ylidene)-1-piperidinecarboxylate

المردود 94.3%

المذيبات

toluene

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةwas refluxed for 3.5 hrs
2. 2
   درجة الحرارةAfter cooling
3. 3
   غسيلthe reaction mixture was washed with hydrochloric acid and water
4. 4
   أخرىdried
5. 5
   تركيزconcentrated

الإجراء التجريبي

A mixture of 33.0 g of 4-(5H-dibenzo[a,d]cyclohepten-5-ylidene)-1-methylpiperidine, 74.9 g of ethyl chlorocarbonate and 170 ml of toluene was refluxed for 3.5 hrs. After cooling, the reaction mixture was washed with hydrochloric acid and water, and then dried and concentrated. The residue was solidified by treatment with n-hexane to give 37.4 g of pale yellow crystals, which were recrystallized from ethanol to give slightly yellow needles, mp 123°-124° C.

المصدر