1,6-Conjugate Addition of Carbon Nucleophiles to (E)-2-Styrylchromones: Unexpected Synthesis of a Stereochemically Complex Pentasubstituted Spirocyclohexane
作者:Eduarda Silva、Artur Silva、Kinga Grenda、Inês Cardoso
DOI:10.1055/s-0033-1340043
日期:——
The regioselective 1,6-conjugate addition of ethyl malonate and malononitrile to ( E )-2-styrylchromones is described. A synthesis of novel pentasubstituted spirocyclohexanes discovered during the course of these studies is also discussed. A novel domino multicomponent 1,6-/1,6-/1,4-conjugate addition reaction for the formation of these new spirocyclohexanes is proposed.
描述了丙二酸乙酯和丙二腈向 (E)-2-苯乙烯基色酮的区域选择性 1,6-共轭加成。还讨论了在这些研究过程中发现的新型五取代螺环己烷的合成。提出了一种用于形成这些新螺环己烷的新型多米诺多组分 1,6-/1,6-/1,4-共轭加成反应。