反応 #40753

反応方程式

KOtBu

Malononitrile

ethyl iodide

→

crude material

2,2-Diethyl-malononitrile

反応条件

後処理

1. 1
   温度the mixture was cooled in an ice bath
2. 2
   その他the ice bath was removed
3. 3
   workup.STIRRINGthe mixture was stirred for 30 minutes at room temperature
4. 4
   抽出Extraction with DCM/H2O
5. 5
   乾燥drying over Na2SO4 and evaporation under reduced pressure

実験手順

Malononitrile (15.2 g) was mixed with TBAB (3.0 g, 4 mol %) and ethyl iodide (36.8 mL, 2 equiv.). After stirring for 30 minutes at room temperature, the mixture was cooled in an ice bath, KOtBu (51.6 g, 2 equiv.) was added portionwise, the ice bath was removed, and the mixture was stirred for 30 minutes at room temperature. Extraction with DCM/H2O, drying over Na2SO4 and evaporation under reduced pressure gave 40 grams of crude material, which was purified by flash chromatography eluting with DCM. This yielded 20.4 grams of an orange oil which solidified upon standing. 1H NMR (400 MHz, CDCl3) δ 1.29 (t, J=7.5 Hz, 6H), 2.00 (q, J=7.5 Hz, 4H).

出典