Patent · US Active

Method for producing N,N-bis(pyridin-2ylmethyl)-1,1-bis(pyridin-2-yl)-1-aminoalkane compounds and metal complex salts containing these compounds

US7977487B2 · kind B2 · utility

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3Claims

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Assignee

Clariant Produkte (Deutschland) GmbH · DE

Inventors

Michael Wessling · Maintal, DE
Barbara Duecker · Mainz, DE
Nicole Nitschke · Eschborn, DE

Key dates

Filing date	May 26, 2006
Grant date	Jul 12, 2011
Priority date	—
Expiry date	Aug 12, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D213/38
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a method for producing the compositions cited in the title. According to this method: dipyridyl ketone is reacted with hydroxylamine; the oxime obtained thereby is reduced without intermediate isolation to form 1,1-di-(2-pyridyl)-methylamine, and; this amine is firstly reacted with 1 to 1.5 molar equivalent of picolyl chloride and then with another 1 to 1.5 molar equivalent of picolyl chloride to form the amine of formula (1).This amine is purified via the tetrafluoroborate salt and subsequently alkylated with an alkyl iodide. This method represents an improvement with regard to prior art methods for producing these compounds.

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