Volume 25, Issue 4 pp. 289-293
Full Paper

The synthesis of non-symmetrical stilbene analogs of trans-resveratrol using the same Pd catalyst in a sequential double-Heck arylation of ethylene

Sabrina M. Nobre

Sabrina M. Nobre

Instituto de Química, UFRGS, Av. Bento Gonçalves, 9500 Porto Alegre 91501-970, CP 15003, RS, Brazil

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Mauro N. Muniz

Mauro N. Muniz

Instituto de Química, UFRGS, Av. Bento Gonçalves, 9500 Porto Alegre 91501-970, CP 15003, RS, Brazil

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Marcus Seferin

Marcus Seferin

Faculdade de Química—PUCRS, Av. Ipiranga, 6681, Porto Alegre, 90619-900, RS, Brazil

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Wagner M. da Silva

Wagner M. da Silva

Faculdade de Química—PUCRS, Av. Ipiranga, 6681, Porto Alegre, 90619-900, RS, Brazil

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Adriano L. Monteiro

Corresponding Author

Adriano L. Monteiro

Instituto de Química, UFRGS, Av. Bento Gonçalves, 9500 Porto Alegre 91501-970, CP 15003, RS, Brazil

Instituto de Química, UFRGS, Av. Bento Gonçalves, 9500 Porto Alegre 91501-970, CP 15003, RS, Brazil.Search for more papers by this author
First published: 06 January 2011
Citations: 12

Abstract

We have developed a sequential and selective Pd-catalyzed double-Heck arylation of ethylene that results in non-symmetrical nitro-stilbene analogs of trans-resveratrol at excellent yields. A catalytic system consisting of Pd(OAc)2 and P(o-tolyl)3 permitted us to carry out the two consecutive Heck arylations without losing activity from the first to the second Heck reaction. After the first Heck arylation of ethylene, no isolation or additional catalyst loading is required for the second Heck arylation reaction. This protocol was applied to the synthesis of methylated trans-resveratrol, which was obtained at a 65% overall yield. Copyright © 2011 John Wiley & Sons, Ltd.

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