Novel Traceless Liquid‐Phase Synthesis of Coumarin Derivatives on Poly(Ethylene Glycol) Support
作者:Shou‐Ri Sheng、Pei‐Gang Huang、Qiong Wang、Ren Huang、Xiao‐Ling Liu
DOI:10.1080/00397910600908868
日期:2006.10.1
Abstract Coumarin derivatives were prepared by the von Pechmann reaction of PEG‐bound acetoacetate reagent with phenols in the presence of TiCl4 in excellent yield and purity with a facile workup procedure. The polymer reagent could be recycled two to four times without diminishing the yield or purity.
摘要 香豆素衍生物是通过 PEG 结合的乙酰乙酸酯试剂与酚类在 TiCl4 存在下的 von Pechmann 反应制备的,收率和纯度都很好,后处理程序简单。聚合物试剂可以循环使用两到四次而不降低产量或纯度。
Microwave-Assisted Pechmann Reaction on P 2 O 5 /Molecular Sieves. Application to the Preparation of 4-Substituted Coumarins
作者:Abbas Shockravi、Hassan Valizadeh、Majid. M. Heravi
DOI:10.1080/10426500214886
日期:2002.12.1
4-Substituted coumarins were efficiently and rapidly synthesised via Pechmanncondensation of phenols with ethylacetoacetate catalyzed by P 2 O 5 /molecular sieves in satisfactory yields.
通过P 2 O 5 /分子筛催化的苯酚与乙酰乙酸乙酯的Pechmann缩合反应,以令人满意的产率高效快速地合成了4-取代香豆素。
Effect of ring substitution on the photochemistry of .alpha.-(aryloxy)acetophenones
作者:J. C. Netto-Ferreira、I. G. J. Avellar、J. C. Scaiano
DOI:10.1021/jo00288a019
日期:1990.1
Photosensitive condensation product, photosensitive compositions and lithographic printing plates containing said condensation product