Patent · US Active

Process for the selective meta-chlorination of alkylanilines

US9193667B2 · kind B2 · utility

0Cited by

2References

10Claims

0Family size

Assignee

LONZA LTD · CH

Inventors

Nikolaus Bieler · Brig, CH
Stefan Ellinger · Visp, CH
Martina Furrer · Visp, CH
Viktor Ladnak · Ludwigshafen, DE
Constanze Müller · Naters, CH
Leo Schmid · Glis, CH
Cornelia Zur Täschler · Visp, CH

Key dates

Filing date	Aug 16, 2011
Grant date	Nov 24, 2015
Priority date	—
Expiry date	Oct 28, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the chlorination of alkylanilines is provided allowing a highly selective chlorination in the meta-position of the aromatic ring. This is achieved by reacting a mixture comprising the alkylaniline and sulfuric acid with chlorine. This process allows a meta-chlorination with a selectivity of more than 90%.

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