Patent · US Active

Process for manufacturing substituted 3-pyridylmethyl ammonium bromides

US9096570B2 · kind B2 · utility

0Cited by

6References

15Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Gebhardt · Monsheim, DE
Frederik Menges · Schriesheim, DE
Michael Rack · Eppelheim, DE
Michael Keil · Freinsheim, DE
Jochen Schroeder · Lambsheim, DE
Stefan Orsten · Ellerstadt, DE
Helmut Zech · Bad Dürkheim, DE
David A. Cortes · Fairless Hills, US
Robert Leicht · Hannibal, US
Tony Yegerlehner · Palmyra, US
Rodney F. Klima · Morrow, US

Key dates

Filing date	Nov 13, 2009
Grant date	Aug 4, 2015
Priority date	—
Expiry date	Oct 28, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D417/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for manufacturing 5,6-disubstituted-3-pyridylmethyl ammonium bromides (I),wherein wherein the symbols have the meaning given in formula (I), with bromine in the presence of a radical initiator in a solvent mixture comprising an aqueous phase and an organic phase, where the organic phase comprises a solvent selected from 1,2-dichloroethane, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene and tetrachloromethane, and where the pH-value of the aqueous phase is from 3 to <8, to obtain a 3-bromomethyl-5,6-disubstituted pyridine compound (III),wherein Y, Y1, Z and Z1 have the meanings given in formula (I), and

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