18168-40-6Relevant articles and documents
Synthesis of salicylaldehydes bearing bulky substituents in the positions 3 and 5
Kochnev,Oleynik,Oleynik,Ivanchev,Tolstikov
, p. 1125 - 1129 (2008/09/17)
Reaction of 2,4-disubstituted phenols with paraformaldehyde in the presence of SnCl4 and 2,6-lutidine afforded a number of new salicylaldehydes, containing bulky substituents (tert-butyl, 1-phenylethyl, 1-(4-tert- butylphenyl)ethyl, α-cumyl, and trityl) in the positions 3 and 5.
Process for preparing para-cumylphenol
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, (2008/06/13)
A process for preparing p-cumylphenol which comprises reacting phenol and α-methylstyrene in the presence of an inorganic solid acid catalyst having an acid point of an acid strength Ho of up to -3, for example activated clay, and recovering the aimed p--cumylphenol from the reaction mixture thus obtained by distilling the same while introducing an inert gas such as nitrogen and/or steam into the distillation system is disclosed. The p-cumylphenol thus obtained has a high purity and an improved color compared with those obtained by conventional methods.
Phenol transalkylation process
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, (2008/06/13)
Phenols having an unsubstituted ortho position are transalkylated in the ortho position by mixing them with an ortho-alpha-branched alkylphenol (e.g., 2,6-di-sec-butylphenol) and an aluminum phenoxide catalyst and heating the mixture to 100°-350°C., preferably in a closed system and in the presence of olefin corresponding in structure to the ortho-alpha-branched alkyl group.