Patent · US Expired

Preparation of ortho-alkylated phenols

US4538008A · kind A · utility

7Cited by
8References
15Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 20, 1984
Grant dateAug 27, 1985
Priority date—
Expiry dateApr 20, 2004

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C37/055
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Secondary or tertiary alkyl phenyl ethers may be induced to undergo thermal rearrangement on alumina, aluminum phosphate, or a silica-modified alumina as catalyst to afford the isomeric ortho-alkylphenol. Such rearrangement generally occurs under milder conditions than does the alkylation of a phenol with an olefin using the same alumina as an alkylating catalyst with high regioselectivity and good control over the extent of alkylation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.