LOW VISCOSITY LOW VOLATILITY LUBRICATING OIL BASE STOCKS AND METHODS OF USE THEREOF
申请人:ExxonMobil Research and Engineering Company
公开号:EP3397736A2
公开(公告)日:2018-11-07
US9976099B2
申请人:——
公开号:US9976099B2
公开(公告)日:2018-05-22
[EN] LOW VISCOSITY LOW VOLATILITY LUBRICATING OIL BASE STOCKS AND METHODS OF USE THEREOF<br/>[FR] HUILE DE BASE D'HUILE DE LUBRIFIATION À FAIBLE VOLATILITÉ ET FAIBLE VISCOSITÉ
申请人:EXXONMOBIL RES & ENG CO
公开号:WO2017116895A2
公开(公告)日:2017-07-06
A composition including one or more aromatic alkanoate monoester compounds represented by the formulae (I) and (II) as defined herein. The composition has a viscosity (Kv100) from about 1 cSt to about 10 cSt at 100°C as determined by ASTM D445, a viscosity index (VI) from about -100 to about 300 as determined by ASTM D2270, and a Noack volatility of no greater than 50 percent as determined by ASTM D5800. A process for producing the composition, a lubricating oil base stock and lubricating oil containing the composition, and a method for improving one or more of thermal and oxidative stability, solubility and dispersancy of polar additives, deposit control and traction control in a lubricating oil by using as the lubricating oil a formulated oil containing the composition.
Synthesis of Dimeric Securinega Alkaloid Flueggeacosine B: From Pd-Catalyzed Cross-Coupling to Cu-Catalyzed Cross-Dehydrogenative Coupling
作者:Gyumin Kang、Sunkyu Han
DOI:10.1021/jacs.2c03861
日期:2022.5.25
synthesis (seven overall steps) involved a Liebeskind–Srogl cross-coupling reaction for the union of two functionalized fragments, the organostannane and the thioester. As a means to further streamline the synthetic route, we have developed a visible-light-mediated Cu-catalyzed cross-dehydrogenative coupling (CDC) reaction between an aldehyde and an electron-deficient olefin. This enabled the second-generation
我们通过两种合成路线完成了二聚体高氧化状态的毛茛生物碱flueggeacosine B的合成。第一代合成(总共七个步骤)涉及 Liebeskind-Srogl 交叉偶联反应,用于结合两个功能化片段,即有机锡烷和硫酯。作为进一步简化合成路线的一种手段,我们开发了一种可见光介导的 Cu 催化的醛和缺电子烯烃之间的交叉脱氢偶联 (CDC) 反应。这使得能够在四个整体步骤中从别斯库氨酸合成第二代氟虫碱 B。新开发的 CDC 反应为共轭二羰基部分铺平了道路,这是一种普遍存在于各种天然产物中的结构部分。,我们通过两种合成路线完成了二聚体高氧化状态的毛茛生物碱flueggeacosine B的合成。第一代合成(总共七个步骤)涉及 Liebeskind-Srogl 交叉偶联反应,用于结合两个功能化片段,即有机锡烷和硫酯。作为进一步简化合成路线的一种手段,我们开发了一种可见光介导的 Cu 催化的醛和缺电子烯烃之间的交叉脱氢偶联