Afume silica supported poly γ ( β cyanoethylsulfenyl) propylsiloxane palladium(0) complex was synthesized from poly γ ( β cyanoethylsulfenyl) propylsiloxane andpalladium chloridein acetone,followed by reduction wi...Afume silica supported poly γ ( β cyanoethylsulfenyl) propylsiloxane palladium(0) complex was synthesized from poly γ ( β cyanoethylsulfenyl) propylsiloxane andpalladium chloridein acetone,followed by reduction with hydrazine hydrate in ethanol. Thestructure ofthis complex wascharacterized by elementalanalysis and X P S. It wasfound thatthe title complex is an efficient catalyst for Heck arylation of acrylamide and butylacrylate . This polymeric palladium(0) catalystis stableto air and can be reused without noticeablelossof activity . Hence this paper presents a simple and practicalstereo selective synthetic methodfor substituted trans cinnamamides and trans butyl cinnamates.展开更多
以高效低毒的旱田除草剂异草酮(2-(2-氯苄基)-4,4-二甲基异唑-3-酮)的基本结构为基础,以Baylis-Hillman加成物为起始原料,设计并合成了3个新型的2-(4,4-二甲基异唑啉-3-酮-2-基)甲基-3-取代芳基丙烯酸酯类化合物,产物及中间体结构经IR,1...以高效低毒的旱田除草剂异草酮(2-(2-氯苄基)-4,4-二甲基异唑-3-酮)的基本结构为基础,以Baylis-Hillman加成物为起始原料,设计并合成了3个新型的2-(4,4-二甲基异唑啉-3-酮-2-基)甲基-3-取代芳基丙烯酸酯类化合物,产物及中间体结构经IR,1H NMR和元素分析确证;生物活性测定结果表明:2-溴甲基-3-(2,4-二氯苯基)丙烯酸乙酯(2b)具有很好的杀虫活性,在600 g ai/hm2的剂量下对朱砂叶螨防效为100%.所合成的目标化合物3在2 000 g ai/hm2的剂量下均具有一定的除草活性,可作为除草活性的新型先导化合物供进一步优化研究.展开更多
文摘Afume silica supported poly γ ( β cyanoethylsulfenyl) propylsiloxane palladium(0) complex was synthesized from poly γ ( β cyanoethylsulfenyl) propylsiloxane andpalladium chloridein acetone,followed by reduction with hydrazine hydrate in ethanol. Thestructure ofthis complex wascharacterized by elementalanalysis and X P S. It wasfound thatthe title complex is an efficient catalyst for Heck arylation of acrylamide and butylacrylate . This polymeric palladium(0) catalystis stableto air and can be reused without noticeablelossof activity . Hence this paper presents a simple and practicalstereo selective synthetic methodfor substituted trans cinnamamides and trans butyl cinnamates.
文摘以高效低毒的旱田除草剂异草酮(2-(2-氯苄基)-4,4-二甲基异唑-3-酮)的基本结构为基础,以Baylis-Hillman加成物为起始原料,设计并合成了3个新型的2-(4,4-二甲基异唑啉-3-酮-2-基)甲基-3-取代芳基丙烯酸酯类化合物,产物及中间体结构经IR,1H NMR和元素分析确证;生物活性测定结果表明:2-溴甲基-3-(2,4-二氯苯基)丙烯酸乙酯(2b)具有很好的杀虫活性,在600 g ai/hm2的剂量下对朱砂叶螨防效为100%.所合成的目标化合物3在2 000 g ai/hm2的剂量下均具有一定的除草活性,可作为除草活性的新型先导化合物供进一步优化研究.
