Synthesis, characterization and structural study of a phosphonium salt containing the [Pd 2 Br 6 ] 2− ion and its application as a novel, efficient and renewable heterogeneous catalyst for amination of aryl halides and the Stille cross-coupling reaction
In this study palladium(II) acetate reacts with a phosphonium salt, [Ph3PCH2C6H4CH2Br]Br, to give [Ph3PCH2C6H4CH2OC(O)CH3]2[Pd2Br6]. Characterization of the obtained compound was performed by elemental analysis, IR, 1H, 31P, 13C NMR and X-ray crystallography. It was found that this compound can act as an efficient catalyst for amination of aryl halides to afford primary amines and satisfactory results
在这项研究中,乙酸钯(II)与a盐[Ph 3 PCH 2 C 6 H 4 CH 2 Br] Br反应,得到[Ph 3 PCH 2 C 6 H 4 CH 2 OC(O)CH 3 ] 2 [Pd 2 Br 6 ]。通过元素分析IR,1 H,31 P,13对所得化合物进行表征1 H NMR和X射线晶体学。发现该化合物可以用作芳基卤化物的胺化以提供伯胺的有效催化剂,并且获得令人满意的结果。它也已经成功地用于催化斯蒂勒交叉偶联反应中。该催化剂易于回收和再利用,而不会显着降低其催化活性。
Synthesis and Biological Evaluation of a Class of Mitochondrially-Targeted Gadolinium(III) Agents
作者:Daniel E. Morrison、Jade B. Aitken、Martin D. de Jonge、Fatiah Issa、Hugh H. Harris、Louis M. Rendina
DOI:10.1002/chem.201404107
日期:2014.12.8
balance required to minimise in vitro cytotoxicity and optimise in vitro tumour selectivity and mitochondrial localisation for this new class of mitochondrially‐targeted binary therapy agents. We also report the highest in vitro tumour selectivity for any Gd agent reported to date, with a T/N (tumour/normal cell) ratio of up to 23.5±6.6.
Reactions of 4-halo-2-alken(arylen)ylphosphonium salts with binucleophiles
作者:M. Zh. Ovakimyan、S. K. Barsegyan、A. S. Pogosyan、N. M. Kikoyan、G. A. Panosyan、M. G. Indzhikyan
DOI:10.1007/s11176-005-0111-7
日期:2004.12
Phosphonium salts with a 4-bromo-3-chlorobut-2-enyl or a 3-chlorobuta-1,3-dienyl group react with phenylhydrazine to give phenylhydrazones of corresponding 4-phospohonio-substituted 2-chloro-2-butenals. Reactions of phosphonium salts containing a 4-bromo-3-chlorobut-2-enyl group with a series of binucleophiles were studied. Under the action of urea, 1,4-dehydrobromination takes place to form a salt with a conjugated diene group, which undergoes partial 3,4-3,4-cyclization under the reaction conditions. Nucleophilic substitution reactions of [o-(bromomethyl)benzyl]triphenylphosphonium bromide with binucleophiles were also carried out.
Method for making intermediates useful in synthesis of retroviral protease inhibitors
申请人:G.D. SEARLE & CO.
公开号:EP0855388A2
公开(公告)日:1998-07-29
A synthesis is described for intermediates which are readily amenable to the large scale preparation of hydroxyethylurea-based chiral HIV protease inhibitors. The method includes forming a cyanohydrin from a chiral alpha amino aldehyde.
本文介绍了一种易于大规模制备羟乙基脲类手性 HIV 蛋白酶抑制剂的中间体合成方法。该方法包括从手性α-氨基醛中形成氰醇。