Copper-Catalyzed One-Pot Synthesis of Unsymmetrical Arylurea Derivatives via Tandem Reaction of Diaryliodonium Salts with <i>N</i>-Arylcyanamide
作者:Pengfei Li、Guolin Cheng、Hong Zhang、Xianxiang Xu、Jingyuan Gao、Xiuling Cui
DOI:10.1021/jo501334u
日期:2014.9.5
efficient “one-pot” approach to multiple substituted ureas from N-arylcyanamide and diaryliodoniumsalts has been presented. The two-step procedure involved the weak base-promoted chemoselective arylation of secondary amines with diaryliodonium and Cu-catalyzed nucleophilic addition of N-arylcyanamide with second diaryliodonium. The diverse unsymmetrical arylureas were obtained in up to 91% yield for 29 examples
A cascade process for directly converting nitriles (RCN) to cyanamides (RNHCN) <i>via</i> SO<sub>2</sub>F<sub>2</sub>-activated Tiemann rearrangement
作者:Guofu Zhang、Yiyong Zhao、Chengrong Ding
DOI:10.1039/c9ob01547g
日期:——
practical process for the direct conversion of nitriles to cyanamides was newly discovered and exhibited a wide substrate scope as well as great functional group-tolerability (36 examples). In this efficient strategy, the in situ generated amidoximes obtained from the reaction of nitriles with hydroxylamine subsequently underwent Tiemann rearrangement, producing the corresponding cyanamides with great
Preparation of novel palladium nanoparticles supported on magnetic iron oxide and their catalytic application in the synthesis of 2-imino-3-phenyl-2,3-dihydrobenzo[<i>d</i>
]oxazol-5-ols
Novel Pd nanoparticles were prepared in five successive stages: 1) preparation of the Fe3O4 magnetic nanoparticles (Fe3O4 MNPs), 2) coating of Fe3O4 MNPs with SiO2 (Fe3O4@SiO2), 3) functionalization of Fe3O4@SiO2 with 3‐chloropropyltrimethoxy‐ silane (CPTMS) ligand (Fe3O4@SiO2@CPTMS), 4) further functionalization with 3,5‐diamino‐1,2,4‐triazole (DAT) ligand (Fe3O4@SiO2@CPTMS @DAT), and 5) the complexation
在五个连续的阶段中制备了新型Pd纳米颗粒:1)制备Fe 3 O 4磁性纳米颗粒(Fe 3 O 4 MNPs),2)用SiO 2(Fe 3 O 4 @SiO 2)涂覆Fe 3 O 4 MNPs。,3)的Fe的官能化3 ö 4 @SiO 2与3- chloropropyltrimethoxy-硅烷(CPTMS)配体(铁3 ö 4 @SiO 2个@CPTMS),4)进一步官能化与3,5-二氨基-1,2,4- ‐三唑(DAT)配体(Fe 3 O 4 @SiO2 @CPTMS @DAT),和5)Fe 3 O 4 @SiO 2 @ CPTMS @ DAT与PdCl 2(Fe 3 O 4 @SiO 2 @ CPTMS @ DAT @ Pd)的络合。然后,通过不同的方法,如元素分析(CHN),FT-IR,XRD,EDX,SEM,TEM,TG-DTA和VSM,对制得的Pd纳米催化剂进行了表征。最后,Pd催化
(Terpyridine)(acetylacetonate)ruthenium(II) complex with a zwitterionic form of phosphoniophenylcyanamide ligand
Abstract The complex [Ru(tpy)(acac)(PPh4cyd)][PF6] (where tpy: 2,2′:6′,2″-terpyridine, acac: acetylacetone and PPh4cyd: 4-triphenylphosphoniophenylcyanamide) has been synthesized. It contains the zwitterionic form of the phosphoniophenylcyanamide ligand. Characterizations were carried out using IR, ES-MS, UV–Vis, electrochemistry and 1H, 13C and 31P NMR spectroscopy.
polymeric support was prepared by the functionalization of the 4‐(benzyloxy)benzyl chloride polymer with 5‐phenyl‐1‐H‐tetrazole and the subsequent complexation with PdCl2. Then, it was characterized with different methods and used as catalyst in the green benzylation reaction of various aryl cyanamides with benzyl bromide and K2CO3 in EtOH at 60°C for the appropriate times. Also, the antibacterial properties
固定在官能化聚合物载体上的Pd配合物是通过4-(苄氧基)苄基氯聚合物与5-苯基-1- H-四唑的官能化反应以及随后与PdCl 2的络合制备的。然后,用不同的方法对其进行表征,并将其用作催化剂,在60℃下于EtOH中将各种芳基氰酰胺与苄基溴和K 2 CO 3进行绿色苄基化反应。此外,还研究了Pd聚合物支持的复合物对多种革兰氏阳性和革兰氏阴性细菌的抗菌性能,在某些情况下,其抗苏云金芽孢杆菌的四环素标准抗生素(革兰氏阳性)具有相同的作用。细菌)和粘质沙雷氏菌(革兰氏阴性细菌)。