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ChemInform Abstract: The First Heck Reactions with 1-Chloroalk-1-ynes: Syntheses of Enynes with Isolated and Conjugated π-Systems.

✍ Scribed by Michael Weigelt; Diana Becher; Dieter Stroehl; Clemens Bruhn; Eike Poetsch; Dirk Steinborn

Publisher: John Wiley and Sons
Year: 2010
Weight: 32 KB
Volume: 30
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199915081

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✦ Synopsis

The First Heck Reactions with 1-Chloroalk-1-ynes: Syntheses of Enynes with Isolated and Conjugated π-Systems.

-The reaction of 1-chloroalk-1-ynes with cycloalkenes and cycloalkadienes in the presence of a Larock catalyst system gives not only the regular Heck products of type (III) but also bicyclic unsaturated hydrocarbons as tandem products derived from reaction of the alkyne and the cycloolefin in a ratio of 1:2 [e.g. (IV)] and 2:1 [e.g. (V)].

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