improve the antimalarialactivity of peptidomimetic Plm inhibitors, we attached substituents on a structure of the highly potent Plm inhibitor KNI-10006. Among the derivatives, we identified alkylamino compounds such as 44 (KNI-10283) and 47 (KNI-10538) with more than 15-fold enhanced antimalarialactivity, to the sub-micromolar level, maintaining their potent Plm II inhibitory activity and low cytotoxicity
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。
An efficient procedure for the synthesis of coumarin derivatives using TiCl4 as catalyst under solvent-free conditions
作者:Hassan Valizadeh、Abbas Shockravi
DOI:10.1016/j.tetlet.2005.03.124
日期:2005.5
titanium(IV) chloride as a catalyst to promote the Pechmann condensation reaction with a range of phenols and β-keto esters is described.The reaction was carried out by addition of TiCl4 to a mixture of the phenol and the β-keto ester with thorough stirring in the absence of a solvent and represents an improvement on the classical Pechmann conditions. The yields of coumarins obtained via this novel protocol
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。