N-Heterocyclic carbene catalyzed synthesis of oxime esters
作者:Dieter Enders、André Grossmann、David Van Craen
DOI:10.1039/c2ob26974k
日期:——
A triazolium salt derived N-heterocyclic carbene catalyzes the redox esterification reaction between α–β-unsaturated aldehydes and oximes. The resulting saturated oxime esters were obtained in very good yields for a broad range of aliphatic, aromatic and heteroaromatic substrates.
Visible-light-mediated synthesis of oxime esters <i>via</i> multicomponent reactions of aldehydes, aryl amines, and <i>N</i>-hydroxyphthalimide esters
作者:Anh Thu Nguyen、Hee-Kwon Kim
DOI:10.1039/d3ra06737h
日期:——
oxime esters is reported. Aldehydes, aniline, and N-hydroxyphthalimide (NHPI) esters were used as substrates in this three-component reaction, and eosin Y was used as a crucial photocatalyst for the reaction. Wide ranges of aldehydes and NHPI esters were well tolerated in this reaction method, generating various oxime esters with high efficiency undermild reaction conditions. This visible-light-mediated
肟酯是许多有机化学转化中有用的支架。本文报道了一种新型可见光介导的肟酯合成三组分反应。在这个三组分反应中,醛、苯胺和N-羟基邻苯二甲酰亚胺 (NHPI) 酯被用作底物,曙红 Y 被用作该反应的关键光催化剂。该反应方法对多种醛和NHPI酯具有良好的耐受性,在温和的反应条件下高效生成各种肟酯。这种可见光介导的方法将是一步合成有用肟酯的有前途的方法。
18F-TAGGED INHIBITORS OF PROSTATE SPECIFIC MEMBRANE ANTIGEN (PSMA) AND THEIR USE AS IMAGING AGENTS FOR PROSTATE CANCER
申请人:Deutsches Krebsforschungszentrum
公开号:EP3356385B1
公开(公告)日:2020-11-11
A Convenient Practical Synthesis of Alkyl and Aryl Oxime Esters
Abstract A facile access to the synthesis of alkyl and aryl oxime esters of ketoximes and aldoximes in high yields (90–97%) is reported. The reactions were performed using N-[3-(methylamino)propyl]-N′-ethylcarbodiimide hydrochloride (EDCI) reagent in the presence of 4-(dimethylamino)pyridine (DMAP) as a catalyst at room temperature. The isolation and purification of products is very simple and in cases