Synthesis of Imidazolidinone, Imidazolone, and Benzimidazolone Derivatives through Oxidation Using Copper and Air
作者:Dazhi Li、Thierry Ollevier
DOI:10.1021/acs.orglett.9b00973
日期:2019.5.17
synthetic method of urea derivativesusing copper and air was developed. These mild conditions provided moderate to very good yields for 15 examples (53–93%), while low yields were obtained with sterically hindered substrates (3 examples). The reaction was found to go through an in situ generated copper–N-heterocyclic carbene, which was then oxidized into cyclic urea derivatives possessing alkyl, benzyl
[EN] THERAPEUTICALLY ACTIVE COMPOUNDS AND THEIR METHODS OF USE<br/>[FR] COMPOSÉS THÉRAPEUTIQUEMENT ACTIFS ET LEURS MÉTHODES D'UTILISATION
申请人:AGIOS PHARMACEUTICALS INC
公开号:WO2015010297A1
公开(公告)日:2015-01-29
Provided are methods of treating a cancer characterized by the presence of a mutant allele of IDH1/2 comprising administering to a subject in need thereof a compound described here.
Mechanism studies of oxidation and hydrolysis of Cu(I)–NHC and Ag–NHC in solution under air
作者:Dazhi Li、Thierry Ollevier
DOI:10.1016/j.jorganchem.2019.121025
日期:2020.1
The decomposition of copper(I)–NHC and silver-NHC complexes in solution under air was studied. The Cu(I)–NHCs were oxidized into urea derivatives and hydrolysed into imidazoliums or benzimidazoliums. The decomposition of Ag–NHC with a saturated backbone led to ring-opening product, while the Ag–NHC with an unsaturated backbone led to imidazolium and Ag-bisNHC complex. The effects of steric property
[
<sup>11</sup>
C]Carbonyl Difluoride—a New and Highly Efficient [
<sup>11</sup>
C]Carbonyl Group Transfer Agent
作者:Jimmy E. Jakobsson、Shuiyu Lu、Sanjay Telu、Victor W. Pike
DOI:10.1002/anie.201915414
日期:2020.4.27
Herein, the synthesis and use of [11 C]carbonyl difluoride for labeling heterocycles with [11 C]carbonyl groups in high molar activity is described. A very mild single-pass gas-phase conversion of [11 C]carbon monoxide into [11 C]carbonyl difluoride over silver(II) fluoride provides easy access to this new synthon in robust quantitative yield for labeling a broad range of cyclic substrates, for example
本文描述了 [11 C] 羰基二氟化物的合成和用途,用于以高摩尔活性标记具有 [11 C] 羰基的杂环。在氟化银 (II) 上将 [11 C] 一氧化碳转化为 [11 C] 羰基二氟化物的非常温和的单程气相转化提供了以稳健的定量产率轻松获得这种新合成子的方法,用于标记广泛的环状底物,例如,咪唑烷-2-酮、噻唑烷-2-酮和恶唑烷-2-酮。标记反应可以利用接近化学计量的前体量和在室温下在多种溶剂中的短反应时间,同时还显示出高水耐受性。整个放射合成协议既简单又可重复。所需的设备可以由广泛可用的部件构成,因此非常适合用于 PET 放射性示踪剂生产的自动化。我们预计这种简单的方法将在放射化学界获得 PET 放射性示踪剂合成的广泛认可。
Carbon Dioxide as a Carbonylating Agent in the Synthesis of 2-Oxazolidinones, 2-Oxazinones, and Cyclic Ureas: Scope and Limitations
Carbon dioxide can be used as a convenient carbonylating agent in the synthesis of 2-oxazolidinones, 2-oxazinones, and cyclic ureas. The transient carbamate anion generated by treating a primary or secondary amine group in basic media can be activated with phosphorylatingagents such as Diphenylphosphoryl azide (DPPA) and Diphenyl chlorophosphate (DPPCl) but also with other types of electrophiles such