Novel Short-Step Synthesis of Functionalized γ-Phenyl-β-hydroxybutenoates and their Cyclization to 4-Hydroxycoumarins via the <i>N</i>-Hydroxybenzotriazole Methodology
作者:Olga Igglessi-Markopoulou、Giorgos Athanasellis、Georgia Melagraki、Haralambos Chatzidakis、Antreas Afantitis、Anastasia Detsi、John Markopoulos
DOI:10.1055/s-2004-829132
日期:——
A novel method for the synthesis of functionalized 3- substituted 4-hydroxycoumarins is reported. C-Acylation com- pounds were derived from the reaction of the N-hydroxybenzotri- azole ester of the functionalized acetyl salicylic acids and a variety of active methylene compounds and cyclized to the title com- pounds. The synthesis is simple and the compounds are produced in yields varying from 39 to
报道了一种合成功能化3-取代4-羟基香豆素的新方法。C-酰化化合物衍生自官能化乙酰水杨酸的 N-羟基苯并三唑酯与多种活性亚甲基化合物的反应,并环化为标题化合物。合成很简单,化合物的产率从 39% 到 80% 不等。文献中首次通过核磁共振光谱对新制备的 C-酰化化合物的结构进行了深入研究。