Patent · US Active

Process for the preparation of m-substituted alkyltoluenes by isomerization with ionic liquids as catalysts

US8367875B2 · kind B2 · utility

1Cited by

3References

18Claims

0Family size

Assignee

BASF SE

Inventors

Andreas Lanver · Mannheim, DE
Klaus Ebel · Lampertheim, DE
Karl Beck · Langen, DE
Ralf Pelzer · Rastenberg, DE
Jörg Botzem · Schifferstadt, DE
Ulrich Griesbach · Mannheim, DE

Key dates

Filing date	Feb 10, 2011
Grant date	Feb 5, 2013
Priority date	—
Expiry date	Aug 7, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2527/126
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of m-substituted alkyltoluenes of the formula (I)in which R1 is C1-C5-alkyl, wherein a p-substituted alkyltoluene of the formula (II)in which R1 has the meaning given under formula (I), is isomerized in the presence of ionic liquids to give an m-substituted alkyltoluene of the formula (I). The m-substituted alkyltoluenes obtainable according to the invention are starting compounds for the preparation of fragrances and aroma substances.

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