研究了2-氯-4-硝基-α,α,α-三氟甲氧基苯(CNTFMB)的氟化反应,考察了溶剂,相转移催化剂聚乙二醇(PEG6000),KF用量等因素对反应的影响。经实验确定了反应的最佳工艺条件为:n(CNTFMB):n(KF)=1.0:1.4,CNTFMB的质量(g)与溶剂DMF的体积(mL)之比为1:3,n(PEG6000):n(CNTFMB)=0.5:100.0,反应温度135℃,在此条件下,2-氟-4-硝基-α,α,α-三氟甲氧基苯(FNTFMB)的收率为85%,产品纯度w(FNTFMB)=95%
徐杰, 陈其亮
core
[Effects and mechanisms of cerium-myricetin nanosystem on wound healing in rats with full-thickness burns]. [PDF]
Wang T +7 more
europepmc +1 more source
Pd/CNTs金属纳米催化剂的制备及其催化对氯硝基苯加氢性能
通过硝酸浸渍法对碳纳米管(CNTs)进行预处理改性,并采用乙二醇液相还原法制备Pd/CNTs纳米催化剂,通过XRD、TEM、BET、拉曼光谱、ICP等手段对其进行表征。结果表明,Pd/CNTs催化剂中Pd的负载量为0.9 wt%,Pd纳米颗粒均匀地分散在CNTs表面,粒径平均大小为5 nm。该催化剂用于对氯硝基苯的选择加氢反应,在常压、60℃下反应2 h,转化率为94.7%,选择性为89.2%
张瀚 +4 more
core
[Nanomaterial-driven Lateral Flow Immunoassay: Technological Development and Application]. [PDF]
Zheng J, Hu X, Gu B.
europepmc +1 more source
对甲苯磺酸催化下二乙酰苯与含有羟基的苯甲醛的Aldol缩合反应
以对甲苯磺酸(p-TsOH)作催化剂,二乙酰苯与含有羟基的苯甲醛发生aldol缩合反应,合成了3个1,3-双[3-(取代苯基)丙烯酰基]苯衍生物1~3,3个1,4-双[3-(取代苯基)丙烯酰基]苯衍生物4~6和2个中间体7,8,中间体7,8再与含有羟基的苯甲醛发生aldol反应合成了3个1-[3-(4-羟基苯基)丙烯酰基]-4-[3-(取代苯基)丙烯酰基]苯衍生物9~11,反应均能在2~6d内完成,操作和后处理简便.以上11个新化合物均未见报道,其结构经1HNMR,IR ...
尹述凡 +4 more
core
[Progress in the metabolic and biotransformation of polycyclic aromatic hydrocarbons and their derivatives in humans]. [PDF]
Qian JK +6 more
europepmc +1 more source
[How I treat pediatric febrile infection-related epilepsy syndrome]. [PDF]
Deng XL, Peng J.
europepmc +1 more source
[Butyrate alleviates <i>Clostridium difficile</i> infection in high-fat diet-induced obese mice]. [PDF]
Dong M +9 more
europepmc +1 more source
[Effects and mechanisms of PIT on wound healing of full-thickness skin defects in diabetic mice]. [PDF]
Zong YG, Huang WQ, Zhang Z, Peng Y.
europepmc +1 more source
[Simultaneous determination of 50 veterinary drug residues in fish, shrimp, and crabs using a composite purification column-ultra-performance liquid chromatography-tandem mass spectrometry]. [PDF]
Deng HD, Ji XF, Xiao YP, Xia Q, Yang H.
europepmc +1 more source

