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Asymmetric [4+2] cycloadditions employing 1,3-dienes derived from (R)-4-t-butyldimethyl-silyloxy-2-cyclohexen-1-one
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Asymmetric [4+2] cycloadditions employing 1,3-dienes derived from (R)-4-t-butyldimethyl-silyloxy-2-cyclohexen-1-one

Zhengmao Hua, Lei Chen, Yan Mei and Zhendong Jin
Tetrahedron letters, Vol.50(48), pp.6621-6623
12/02/2009
DOI: 10.1016/j.tetlet.2009.09.055
PMCID: PMC2776744
PMID: 20161352

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Abstract

1,3-Dienes derived from (R)-4-t-butyldimethylsilyloxy-2-cyclohexen-1-one react with activated dienophiles to form predominately (or sometimes exclusively) syn/endo products. These controlled [4+2] cycloadditions increase the asymmetric complexity from one asymmetric center in the starting material to five asymmetric centers in the products in a single step, and provide a powerful approach for the asymmetric synthesis of compounds containing the bicyclo[2.2.2]octanone carbon skeleton. (C) 2009 Elsevier Ltd. All rights reserved.
Chemistry Chemistry, Organic Physical Sciences Science & Technology

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