Iron powder and tin/tin chloride as new reducing agents of Meerwein arylation reaction with unexpected recycling to anilines
作者:Ahmed B. Abdelwahab、Eslam R. El-Sawy、Gilbert Kirsch
DOI:10.1080/00397911.2019.1704786
日期:2020.2.16
of NaNO2/HCl was trapped by alkyl aryl radical to form oximes in the E configuration form. The presence of tin/tin chloride mixture in the reaction of the aryl diazonium salts with methyl vinyl ketone produced Michael products along with β-aryl methyl ketones. The predicted α-aryl methyl ketones from the reaction of isopropenyl acetate with the diazotized anilines were obtained using iron or tin/tin
摘要 开发了使用铁粉或锡/氯化锡混合物进行Meerwein芳基化反应的简单快速路线。在铁粉存在下,不同的芳基重氮盐与甲基乙烯基酮、丙烯酸酯和乙酸异丙烯酯反应。在甲基乙烯基酮的情况下,肟的生产被检测为丙烯酸酯的主要产物或与β-芳基甲基酮的混合物。由过量的 NaNO2/HCl 原位生成的 HNO2 被烷基芳基捕获,形成 E 构型形式的肟。在芳基重氮盐与甲基乙烯基酮的反应中锡/氯化锡混合物的存在产生迈克尔产物以及β-芳基甲基酮。使用铁或锡/锡氯化物混合物从乙酸异丙烯酯与重氮化苯胺的反应中获得预测的α-芳基甲基酮。图形概要
C−O Hydrogenolysis Catalyzed by Pd-PMHS Nanoparticles in the Company of Chloroarenes
作者:Ronald J. Rahaim、Robert E. Maleczka
DOI:10.1021/ol102757v
日期:2011.2.18
Catalytic Pd(OAc)2 and polymethylhydrosiloxane (PMHS), in conjunction with aqueous KF, and a catalytic amount of an aromaticchloride, effects the chemo-, regio-, and stereoselective deoxygenation of benzylic oxygenated substrates at room temperature in THF. Preliminary mechanistic experiments suggest the process to involve palladium−nanoparticle-catalyzed hydrosilylation followed by C−O reduction
DENDRIMER CONJUGATES OF AGONISTS AND ANTAGONISTS OF THE GPCR SUPERFAMILY
申请人:Jacobson Kenneth A.
公开号:US20090012035A1
公开(公告)日:2009-01-08
Disclosed are conjugates comprising a dendrimer and a ligand, which is a functionalized congener of an agonist or antagonist of a receptor of the G-protein coupled receptor (GPCR) superfamily, for example, wherein the functionalized congener is an A
1
adenosine receptor agonist having a purine nucleoside moiety and a functional group at the N
6
position of the purine nucleoside moiety, wherein the functional group has the formula (I): N
6
H—Ar
1
—CH
2
—C(═O)NH—R
1
(I), wherein Ar
1
and R
1
as defined herein. Also disclosed are pharmaceutical compositions, methods of treating various diseases, and a diagnostic method employing such conjugates.
[EN] CYCLIC PEPTIDE COMPOUNDS AND RELATED METHODS, SALTS AND COMPOSITIONS<br/>[FR] COMPOSÉS DE PEPTIDES CYCLIQUES ET PROCÉDÉS, SELS ET COMPOSITIONS ASSOCIÉS
申请人:MERCK SHARP & DOHME
公开号:WO2015172047A1
公开(公告)日:2015-11-12
This invention relates to compounds useful in the preparation of lipopeptides and related methods of preparing and using these compounds.
本发明涉及在制备脂肽和相关方法中有用的化合物,以及制备和使用这些化合物的相关方法。
NOVEL ANTIBACTERIAL AGENTS FOR THE TREATMENT OF GRAM POSITIVE INFECTIONS
申请人:Metcalf, III Chester A.
公开号:US20140073558A1
公开(公告)日:2014-03-13
The present invention relates to novel lipopeptide compounds, pharmaceutical compositions of these compounds and methods of using these compounds as antibacterial compounds. The compounds of the invention are particularly useful against a variety of bacteria, including resistant strains. The compounds are useful as antibacterial agents against
Clostridium difficile.