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The first chemo- and regiospecific palladium-catalyzed enyne-diyne [4+2] intermolecular cross-benzannulation: an effective route to polysubstituted benzenes

✍ Scribed by Vladimir Gevorgyan; Naoki Sadayori; Yoshinori Yamamoto

Book ID: 104258334
Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 139 KB
Volume: 38
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(97)10295-7

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✦ Synopsis

Series of di-and trisubstituted conjugated enynes 3 in the presence of Pd(PPh3)4 catalyst underwent [4+2] crossbenzannulation reaction with conjugated diynes 4 affording polysubstituted benzenes 5 in reasonable to excellent chemical yields. In all eases the cycloaddition reaction proceeded in regio-and chemospecific manner.

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