Patent · US Expired

Process for the preparation of bis-hydroxyphenyl-n-alkanes, new bis-hydroxyphenyl-n-alkanes and new alkanediones

US4716252A · kind A · utility

4Cited by

2References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Rudolf Wagner · Fontnas, CH
Kurt Halcour · Leverkusen, DE
Hans-Rudolf Dicke · Bestwig, DE
Volker Eckhardt · Walsrode, DE

Key dates

Filing date	Jul 28, 1986
Grant date	Dec 29, 1987
Priority date	—
Expiry date	Jul 28, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C49/84
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Bis-hydroxyphenyl-n-alkanes are prepared by contacting dicarboxylic acids or dicarboxylic acid derivatives with fluorine-containing organic sulphonic acids, where appropriate with the addition of a phenolic compound, and converting the alkanediones, which are thus obtainable, into bis-hydroxyphenyl-n-alkanes by hydrogenation and, where appropriate, an additional ether cleavage. The invention also relates to new bis-hydroxyphenyl-n-alkanes and to new alkanediones.

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