Microwave-Promoted, One-Pot, Solvent-Free Synthesis of 4-Arylcoumarins from 2-Hydroxybenzophenones
作者:José Crecente-Campo、M. Pilar Vázquez-Tato、Julio A. Seijas
DOI:10.1002/ejoc.201000051
日期:2010.7
4-Arylcoumarins are synthesized in very good yields through solvent-free microwave irradiation of 2-hydroxybenzophenones and alkyl malonate in the presence of DBU. The one-pot synthesis is carried out with Knoevenagel condensation, intramolecular lactonization, and decarboxylation reactions. The method can be applied to a broad scope of neoflavonoids.
在 DBU 存在下,通过 2-羟基二苯甲酮和丙二酸烷基酯的无溶剂微波辐射,以非常好的收率合成 4-芳基香豆素。通过 Knoevenagel 缩合、分子内内酯化和脱羧反应进行一锅法合成。该方法可应用于广泛的新黄酮类化合物。