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Approche efficace des thapsigargines (guaianolides) et synthèse d'azulènes rouges via un intermédiaire commun de type bicyclo[5.3.0]décane

Abstract : The [2+2] cycloaddition of dichloroketene and 7-methylcycloheptatriene, followed by ring expansion with diazomethane and dehydrohalogenation, affords -chlorotrienone with high selectivity. In the past, this compound proved to be very efficient in the synthesis of natural sesquiterpenes containing the bicyclo[5.3.0]decane squeletton (guaianes, guaianolides, azulenes…). This methodology was used in an efficient synthetic approach of thapsigargins, which are complex guaianolides currently studied to treat prostate cancer via a derivative. Our work led us to get an advanced intermediate for this family, with key moities and configurations. It can also be used to access to natural azulenes. Then we synthetized blue, purple and red azulenes (the first ones for the latters).
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Submitted on : Thursday, May 2, 2013 - 4:17:11 PM
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Frédéric Mace Macé. Approche efficace des thapsigargines (guaianolides) et synthèse d'azulènes rouges via un intermédiaire commun de type bicyclo[5.3.0]décane. Sciences agricoles. Université de Grenoble, 2012. Français. ⟨NNT : 2012GRENV054⟩. ⟨tel-00819870⟩

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