Patent · US Active

Process for the preparation of 2,2-difluoroethylamine

US8580973B2 · kind B2 · utility

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Assignee

BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

Norbert Lui · Odenthal, DE
Jens-Dietmar Heinrich · Burscheid, DE

Key dates

Filing date	Jan 23, 2012
Grant date	Nov 12, 2013
Priority date	—
Expiry date	Jan 23, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C209/62
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of 2,2-difluoroethylamine, comprising the reaction of 2,2-difluoro-1-chloroethane with an imide of the formula (II)in the presence of an acid scavenger, to give a compound of the formula (III)in which, in the compounds of the formulae (II) and (III), R1 and R2 are, each independently of one another, hydrogen or C1-C6-alkyl or R1 and R2 form, together with the carbon atoms to which they are bonded, a six-membered aromatic ring which is optionally substituted; and the cleavage of 2,2-difluoroethylamine by reaction of the compound of the formula (III) with acid, base or hydrazine.

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