تفاعل #569996

معادلة التفاعل

4-hydroxy-4'-biphenylcarboxylic acid

(-)2-methylbutanol

sulfuric acid

→

4-hydroxy-4'-biphenylcarboxylic acid 2-methylbutyl ester

المذيبات

benzene

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةheated in a container
2. 2
   أخرىprovided with a Dean-Stark
3. 3
   درجة الحرارةreflux condenser
4. 4
   أخرىGenerated water was removed
5. 5
   درجة الحرارةAfter the reaction mother liquor was cooled
6. 6
   غسيلwashed with water
7. 7
   workup.DISTILLATIONthe solvent was distilled off

الإجراء التجريبي

20 g of 4-hydroxy-4'-biphenylcarboxylic acid, 53 g of (-)2-methylbutanol, and 4 g of conc. sulfuric acid were refluxed for 20 minutes, admixed with 500 ml of benzene, and heated in a container provided with a Dean-Stark reflux condenser. Generated water was removed. After the reaction mother liquor was cooled and washed with water, the solvent was distilled off to obtain crude 4-hydroxy-4'-biphenylcarboxylic acid 2-methylbutyl ester. The product was recrystallized from benzene-heptane mixed solvent to obtain a purified product having a melting point of 115° to 116° C.

المصدر