Toward Diels−Alder Reactions on a Solid Support Using Polymer BoundN-Substituted 3-Hydroxy-4,4-dimethyl-2-pyrrolidinone Acrylate Derivatives
作者:Rhalid Akkari、Monique Calmès、Jean Martinez
DOI:10.1002/ejoc.200400019
日期:2004.6
Several N-substituted 3-hydroxy-4,4-dimethyl-2-pyrrolidinone acrylate derivatives, selected to allow their attachment to a polymer, have been prepared and tested as dienophiles in the Diels−Alder reaction. The experiments, performed under TiCl4 catalysis in solution or the solid phase with isoprene and cyclopentadiene as dienes, pointed out the difficulties associated with some of these compounds that
已经制备并测试了几种 N-取代的 3-羟基-4,4-二甲基-2-吡咯烷酮丙烯酸酯衍生物,以允许它们与聚合物连接,并在 Diels-Alder 反应中作为亲二烯体进行测试。在溶液或固相中以异戊二烯和环戊二烯作为二烯在 TiCl4 催化下进行的实验指出了与这些化合物中的一些未能产生相应环加合物相关的困难。13C NMR 研究提供了一些关于丙烯酸酯化合物和 TiCl4 之间相互作用性质的证据。看来反应的结果取决于丙烯酸酯结构和 4-(3-hydroxy-4, 在溶液和固相反应条件下,4-二甲基-2-氧代吡咯烷-1-基)苯甲酸丙烯酸酯衍生物非常有效地以良好的收率和高区域选择性或内向选择性得到环加合物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)