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Synthesis of enol esters from terminal alkynes catalyzed by ruthenium complexes

✍ Scribed by Christophe Ruppin; Pierre H. Dixneuf

Publisher
Elsevier Science
Year
1986
Tongue
French
Weight
136 KB
Volume
27
Category
Article
ISSN
0040-4039

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✦ Synopsis

Regioselective enol ester formation results frcm the addition of saturated and unsaturated carboxylic acids to phenylacetylene in the presence of RuC13, RuClj/2PRj 01 R~C~~(PMe~)(arene~ catalysts. Mononuclear ruthenium complexes, such as RuC13 or RuClz(PR3)(arene), have been shown recently to be more efficient catalysts than Ru3(CO) 12 for the addition of ammonium carbamates to terrninal akynes in the synthesis of vinyl carbamates.'

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Ruthenium-Catalyzed Dimerization of Terminal Alkynes Initiated by a Neutral Vinylidene Complex. -The catalytic coupling of alkynes (III) or (VI) in the presence of Ru complexes such as (I) or (II) leads to butenynes with both conversion and selectivity strongly depending on the alkyne substituent.