تفاعل #42175

معادلة التفاعل

4′-chloroacetophenone

styrene

dicyclohexylmethylamine

→

(trans)-4-acetylstilbene

المردود 75.7%

المذيبات

tetrahydrofuran

ظروف التفاعل

المعالجة

1. 1
   أخرىA 30-ml four-necked flask was equipped with a stirrer
2. 2
   workup.ADDITIONadded into the flask
3. 3
   أخرىThe flask was purged with argon
4. 4
   workup.STIRRINGby stirring at 30° C. for 37 hours
5. 5
   أخرىAfter the completion of the reaction, 5 ml of toluene and 10 ml of saturated sodium chloride solution
6. 6
   workup.ADDITIONwere added
7. 7
   أخرىfollowed by separation
8. 8
   أخرىThe organic phase was purified by column chromatography

الإجراء التجريبي

A 30-ml four-necked flask was equipped with a stirrer, a thermometer and a reflux condenser. 0.773 g (5 mmol) of 4′-chloroacetophenone, 1.042 g (10 mmol) of styrene, 0.034 g (0.038 mmol) of tris(dibenzylideneacetone)dipalladium (0), 1.074 g (5.5 mmol) of dicyclohexylmethylamine and 5 ml of tetrahydrofuran were weighed in the flask, followed by stirring. Further, 0.087 g (0.15 mmol) of tri-tert-butylphosphonium tetra-para-tolylborate obtained in Example B-3 was weighed in air and added into the flask. The flask was purged with argon, followed by stirring at 30° C. for 37 hours. After the completion of the reaction, 5 ml of toluene and 10 ml of saturated sodium chloride solution were added, followed by separation. The organic phase was purified by column chromatography to afford 0.841 g of (trans)-4-acetylstilbene (yield: 75 mol % based on 4′-chloroacetophenone). The identification of the product was made by mass spectroscopy, 1H-NMR and 13C-NMR.

المصدر