反応 #1354

反応方程式

2-ethyl-1-hydroxy-4-phenylindane

triethylamine

methanesulfonyl chloride

→

desired product

収率 73.0%

2-ethyl-4-phenylindene

収率 73.0%

溶媒

methylene chloride

methylene chloride

反応条件

後処理

1. 1
   その他A 300-ml four-necked round flask equipped with a stirring bar, a dropping funnel
2. 2
   workup.ADDITIONTo the mixture was dropwise added a solution
3. 3
   workup.ADDITIONAfter the addition
4. 4
   その他Then, the organic phase was separated
5. 5
   抽出the aqueous phase was further extracted with 50 ml of methylene chloride two times
6. 6
   洗浄The combined organic phase was washed with a saturated aqueous solution of NaHCO3
7. 7
   乾燥by drying over anhydrous Na2SO4
8. 8
   その他The solvent was evaporated under reduced pressure
9. 9
   その他The residue was chromatographed on silica gel (eluting with hexane)

実験手順

A 300-ml four-necked round flask equipped with a stirring bar, a dropping funnel and a thermometer was charged with 9.78 g (41.3 mmol) of 2-ethyl-1-hydroxy-4-phenylindane, 17.2 ml (123.8 mmol) of triethylamine, 0.25 g (2.1 mmol) of 4-dimethylaminopyridine and 98 ml of methylene chloride. To the mixture was dropwise added a solution containing 6.4 ml (82.5 mmol) of methanesulfonyl chloride dissolved in 6.5 ml of methylene chloride under a nitrogen atmosphere at 0° C. After the addition was completed, the reaction mixture was stirred for 3.5 hours at this temperature. The reaction mixture was poured onto 250 ml of ice-water. Then, the organic phase was separated and the aqueous phase was further extracted with 50 ml of methylene chloride two times. The combined organic phase was washed with a saturated aqueous solution of NaHCO3, and then a saturated aqueous solution of sodium chloride, followed by drying over anhydrous Na2SO4. The solvent was evaporated under reduced pressure. The residue was chromatographed on silica gel (eluting with hexane) to obtain 6.56 g of the desired product as a pale yellow liquid (mixture of two kinds of isomers) (yield: 73%).

出典