Abstract: The invention concerns a process for the preparation of N-aryl-aza-heterocycles of the general formula I
by reaction of aza-heterocycles with activated aryl halides with use of caesium carbonate without addition of further catalysts at room temperature.
Type:
Grant
Filed:
February 7, 2002
Date of Patent:
August 10, 2004
Assignee:
Goedecke GmbH
Inventors:
Hubert Barth, Klaus Steiner, Simon Schneider, Ulrich Bayer, Manfred Westermayer, Ulrike Wolfsperger, Hans-Jürgen Betche
Abstract: Process for the preparation of symmetrical and asymmetrical carbonates of the general formula I
by reaction of alcohols of the general formula II and alkyl or aryl halides of the general formula III,
R—OH II
R′—HAL III
with carbon dioxide and caesium carbonate at room temperature in dipolar aprotic solvents.
Type:
Grant
Filed:
July 22, 2002
Date of Patent:
May 25, 2004
Assignee:
Goedecke GmbH
Inventors:
Hubert Barth, Klaus Steiner, Simon Schneider, Ulrich Bayer, Manfred Westermayer, Ulrike Wolfsperger
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