Catalytic regioselective chlorination of phenols in the presence of polysulfide polymer containing 1, 3, 4-thiadiazole unit | ||
| journal of kerbala university | ||
| Article 1, Volume 10, Issue 2, July 2014, Pages 228-237 PDF (0 K) | ||
| Author | ||
| Ali Jassim. Al-Zuhairi | ||
| Abstract | ||
| Polymeric sulfides containing 1, 3, 4-thiadiazole unit with different spacer group length have been synthesized and established to be useful catalysts for the chlorination of phenol, o-cresol, m-cresol and m-xylenol using freshly distilled sulfuryl chloride in the presence of Lewis acid as a co-catalyst at room temperature. The yields of para-isomers and para/ortho ratios were higher compared to cases where no catalyst was used with most catalysts for most phenols even when a very low concentration of poly sulfide was used. | ||
| Keywords | ||
| Regioselective chlorination; polymeric sulfide; catalysts; phenol; Lewis acid | ||
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