With the method of Urea inclusion,the content of α Linolenic acid (ALA) from perilla oil,Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA) from fish oil were enriched.The results showed that with once separa...With the method of Urea inclusion,the content of α Linolenic acid (ALA) from perilla oil,Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA) from fish oil were enriched.The results showed that with once separation,the purity of ALA and EPA+DHA was concentrated to 87.1% and above 70% respectively,the optimum conditions being given.展开更多
2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The ef...2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The effect of polymerization retarader,the amount of sulfuric acid and reaction duration on the yield of TFPA was reported.The results showed that the yield of TPFE was 65~70% based on the theoretical calculation under optimized experimental conditions.展开更多
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
文摘With the method of Urea inclusion,the content of α Linolenic acid (ALA) from perilla oil,Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA) from fish oil were enriched.The results showed that with once separation,the purity of ALA and EPA+DHA was concentrated to 87.1% and above 70% respectively,the optimum conditions being given.
文摘2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The effect of polymerization retarader,the amount of sulfuric acid and reaction duration on the yield of TFPA was reported.The results showed that the yield of TPFE was 65~70% based on the theoretical calculation under optimized experimental conditions.
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.