SYNTHESES OF LIQUID-CRYSTAL INTERMEDIATES 4-ALKYLBENZENETHIOLS AND PHENOLS

被引:25
作者
NEUBERT, ME
LASKOS, SJ
GRIFFITH, RF
STAHL, ME
MAURER, LJ
机构
来源
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1979年 / 54卷 / 3-4期
关键词
D O I
10.1080/00268947908084856
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An improved synthesis of 4-alkylbenzenethiols was developed. Sulfonation of alkylbenzenes in sulfuric acid at 75 degree yields 4-akylbenzene sulfonic acid salts which are free of other positional isomers in high yields. Conversion to the thiols via the sulfonyl chlorides provide a high yield, 3 step synthesis of pure 4-alkylbenzenethiols. Fusion of the salts with potassium hydroxide provides a simple synthetic approach to pure 4-alkylphenols as well. Both the thiols and phenols are useful intermediates in the preparation of mesomorphic compounds.
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页码:221 / 236
页数:16
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