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Palladium catalyzed addition of carbon pronucleophiles to conjugated enynes

✍ Scribed by Vladimir Gevorgyan; Chie Kadowaki; Matthew M. Salter; Isao Kadota; Shinichi Saito; Yoshinori Yamamoto

Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
461 KB
Volume
53
Category
Article
ISSN
0040-4020

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✦ Synopsis

Palladium catalyzed addition of certain carbon pronucleophiles 2 to conjugated enynes l afforded the corresponding allenes 3 in good to excellent yields. The most reactive methynes such o.~ methylmalononitrile 2e enabled to undezgo double addition leading to alkenes 4. Catalyst optimization supported Pd2(dba)3,0 CHCI3 -dppfcombination as the best system among all catalysts tested. The plausible mechanisms for these catalytic reactions were proposed.

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