通过使不同的芳酰乙酸酯与N-取代的甘氨酸酯反应,合成了一系列3-[((α-羟基-取代的)亚苄基]吡咯烷-2,4-二酮衍生物作为候选除草剂。通过1H NMR光谱和元素分析鉴定了这些新化合物。对它们的除草活性进行了评估。一些化合物在187.5 g / ha的剂量下表现出优异的除草活性。在苯环的2位和/或4位上合适的供电子取代基对于高除草活性是必不可少的,这一结果以前没有报道。还发现标题化合物的结构-活性关系不同于其他类似种类的较早化合物,其结果可能取决于烯醇结构的不同。
Copper-Catalyzed Formation of CO Bonds by Direct α-CH Bond Activation of Ethers Using Stoichiometric Amounts of Peroxide in Batch and Continuous-Flow Formats
作者:G. Sathish Kumar、Bartholomäus Pieber、K. Rajender Reddy、C. Oliver Kappe
DOI:10.1002/chem.201200815
日期:2012.5.14
Peroxides and ethers in flow: 2‐Carbonyl‐substituted phenols and β‐ketoesters react safely with ethers in a microreactor environment using a copper catalyst and an organic peroxide (TBHP). This protocol results in unsymmetrical acetal scaffolds not easily available otherwise (see scheme).
Enantioselective synthesis of diisopropyl α-, β-, and γ-hydroxyarylalkylphosphonates from ketophosphonates: A study on the effect of the phosphonyl group
作者:Chris Meier、Wolfgang H.G. Laux
DOI:10.1016/0040-4020(95)00855-1
日期:1996.1
conditions to an enantioselective synthesis of diisopropyl α-, β- and γ-hydroxyphosphonates 4–6 by 1.3.2-oxazaborolidine catalysis using catecholborane 7 or BH3·Me2S 8 is described. The comparison to acetophenone reductions gave information's on the effect of the phosphonyl group during the reduction of ketophosphonate. So very efficient syntheses to chiral dialkyl α-, β- and γ-hydroxyphosphonates were
描述了使用儿茶酚硼烷7或BH 3 ·Me 2 S 8通过1.3.2-恶唑硼烷催化的不同还原条件与对映体选择性合成α-,β-和γ-羟基磷酸二异丙酯4-6的比较。与苯乙酮还原的比较给出了在酮膦酸酯还原过程中膦酰基的作用的信息。因此,精心设计了非常高效的手性二烷基α-,β-和γ-羟基膦酸酯的合成方法。