تفاعل #82242

معادلة التفاعل

(5-cyano-2-benzofuranyl)methyltriphenylphosphonium chloride

ethyl 2-(4-acetoxyphenyl)-2-oxoacetate

1,8-diazabicyclo[5.4.0]-7-undecene

→

ethyl 2-(4-acetoxyphenyl)-3-(5-cyano-2-benzofuranyl)acrylate

المردود 85.6%

المذيبات

tetrahydrofuran

ethanol

ظروف التفاعل

المعالجة

1. 1
   أخرىThe resulting reaction solution
2. 2
   تركيزwas concentrated to dryness
3. 3
   أخرىthe residue was purified by silica gel column chromatography

الإجراء التجريبي

15.93 g of (5-cyano-2-benzofuranyl)methyltriphenylphosphonium chloride and 8.29 g of ethyl 2-(4-acetoxyphenyl)-2-oxoacetate were dissolved in a mixture solution of 80 ml of tetrahydrofuran and 80 ml of ethanol. At room temperature, 5.34 g of 1,8-diazabicyclo[5.4.0]-7-undecene was added to the above solution, and the mixture was stirred for 18 hours at the same temperature. The resulting reaction solution was concentrated to dryness, and the residue was purified by silica gel column chromatography using a toluene/ethyl acetate mixture as an eluant to obtain 11.28 g of ethyl 2-(4-acetoxyphenyl)-3-(5-cyano-2-benzofuranyl)acrylate in the form of light yellow crystals as a mixture of E and Z forms.

المصدر