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Synthesis 2002(11): 1564-1570
DOI: 10.1055/s-2002-33347
DOI: 10.1055/s-2002-33347
PAPER
© Georg Thieme Verlag Stuttgart · New York
Carboxylate Derivatives of Oligopyridines Bearing Bromomethyl Groups
Further Information
Received
2 February 2002
Publication Date:
23 August 2002 (online)
Publication History
Publication Date:
23 August 2002 (online)
Abstract
The synthesis of various oligopyridines possessing a carboxylate and at least one bromoethyl group is reported. The bipyridine and terpyridine cores were constructed in good yields via a Stille cross-coupling, starting from bromopicolines and ethyl bromopicolinate. The bromomethyl function was obtained by free radical bromination using NBS in benzene or bromine in benzene/water biphasic mixture. The building of two model podands by nucleophilic displacement of benzylic bromine by an amine or by a phenol group is described.
Key words
Stille reaction - bipyridines - terpyridines - carboxylate - halogenation
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