期刊
JOURNAL OF SULFUR CHEMISTRY
卷 41, 期 4, 页码 345-356出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17415993.2020.1740226
关键词
Poly(alkylene sulfide)s; o-cresol; m-cresol; m-xylenol; para-selective chlorination; sulfuryl chloride; Lewis acid
资金
- King Saud University [Deanship of Scientific Research Chairs]
Chlorination of o-cresol, m-cresol, and m-xylenol using sulfuryl chloride in the presence of a range of poly(alkylene sulfide)s and a Lewis acid (aluminum or ferric chloride) has been studied. The sulfur containing catalysts used led to the production of para-chlorophenols in high yields and higher para/ortho ratios than for reactions in the absence of such poly(alkylene sulfide)s. The effectiveness of the polymers was found to be dependent on the length of the spacer groups between the sulfur atoms. For example, polymers with shorter spacers provided high yields of 4-chloro-o-cresol (ca. 97%), while polymers with at least one longer spacer provided high yields of both 4-chloro-m-cresol (up to 94.6%) and 4-chloro-m-xylenol (up to 97.6%).
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