| 摘要 |
Phenols are selectively ortho-alkylated by reaction at elevated temperature and a pressure up to 3000 p.s.i.g. with an olefin in presence of a zirconium aryloxide. Examples describe the production as the main products of o-(a -methylbenzyl)phenol and 2,6 - bis(a - methylbenzyl)phenol from phenol and styrene; thymol from m-cresol and propylene; o-sec.-butylphenol from phenol and 1-butene; o-t.-butylphenol from phenol and isobutylene; o-butenylphenol from phenol and butadiene; o-a -methylnonylphenol from phenol and 1-decene; 2-t.-butyl-6chlorophenol and 2,4-di-t.-butyl-6-chlorophenol from chlorophenol and isobutylene; 2-(a methylbenzyl)-1-naphthol from naphthol and styrene; 2 - (a - methylbenzyl) - 6 - phenylphenol from o-phenylphenol and styrene; oethylphenol from phenol and ethylene. A number of other suitable phenols and olefins are listed. The catalyst is preferably derived from the phenol undergoing alkylation and may be formed in situ.
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