Reaktion #1737766

Reaktionsgleichung

(S)-4-(6-methyloctyloxy)benzoyl chloride

4-[2-(trans-4-pentylcyclohexyl)ethyl]phenol

→

(S)-4-(6-methyloctyloxy)benzoic acid 4-[2-(trans-4-pentylcyclohexyl)ethyl]phenyl ester

Lösungsmittel

toluene

pyridine

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with diethyl ether
2. 2
   WaschenThe extract was washed four times with 25 ml of 3 N hydrochloric acid each time
3. 3
   Waschenwashed with 25 ml of 2 N sodium carbonate solution and several times with water
4. 4
   Trocknendried over magnesium sulphate
5. 5
   Einengenconcentrated

Vorschrift

The crude (S)-4-(6-methyloctyloxy)benzoyl chloride obtained was dissolved in 20 ml of toluene and then added dropwise to a solution of 0.26 g of 4-[2-(trans-4-pentylcyclohexyl)ethyl]phenol in 2 ml of pyridine. The reaction mixture was stirred at room temperature overnight, then poured into ice-water and extracted with diethyl ether. The extract was washed four times with 25 ml of 3 N hydrochloric acid each time, then washed with 25 ml of 2 N sodium carbonate solution and several times with water, dried over magnesium sulphate and concentrated. Chromatography of the residual oil on silica gel with toluene gave 0.2 g of (S)-4-(6-methyloctyloxy)benzoic acid 4-[2-(trans-4-pentylcyclohexyl)ethyl]phenyl ester. The product was recrystallized several times from ethanol until the phase transition temperatures were constant. M.p. (C-S) 58°, transition S-S*C 58.5° C., transition S*C -Ch 93° C., cl.p. (Ch-I) 140° C.

Quelle