反応 #216804

反応方程式

sodium iodide

chloromethyl ethyl ether

potassium tert-butoxide

2,3-dibromo-5-(p-chlorophenyl)-4-[(trifluoromethyl)sulfonyl]pyrrole

→

title product

収率 74.2%

2,3-Dibromo-5-(p-chlorophenyl)-1-(ethoxymethyl)-4-[(trifluoromethyl)sulfonyl]pyrrole

収率 74.2%

溶媒

hexane

water

tetrahydrofuran

tetrahydrofuran

反応条件

後処理

1. 1
   workup.STIRRINGstirred for five minutes
2. 2
   workup.STIRRINGstirred at room temperature for several hours
3. 3
   抽出extracted with ether
4. 4
   洗浄The combined organic extracts are washed with water and brine
5. 5
   乾燥dried over anhydrous sodium sulfate
6. 6
   濃縮concentrated in vacuo
7. 7
   その他to give an orange oil
8. 8
   ろ過filtered

実験手順

A solution of potassium tert-butoxide (0.62 g, 0.0055 mol) in tetrahydrofuran is treated with 2,3-dibromo-5-(p-chlorophenyl)-4-[(trifluoromethyl)sulfonyl]pyrrole (2.34 g, 0.005 mol), stirred for 15 minutes, treated with sodium iodide (0.82 g, 0.0055 mol), stirred for five minutes, treated with a solution of chloromethyl ethyl ether (0.52 g, 0.0055 mol) in tetrahydrofuran, stirred at room temperature for several hours, poured into water and extracted with ether. The combined organic extracts are washed with water and brine, dried over anhydrous sodium sulfate and concentrated in vacuo to give an orange oil. The oil is slurried in hexane and filtered to obtain the title product as a pale yellow solid (1.95 g, mp 133°-135° C.) which is identified by 1HNMR and 19FNMR spectral analyses.

出典