Palladium-Catalyzed Oxidative Double CH Functionalization/Carbonylation for the Synthesis of Xanthones
作者:Hua Zhang、Renyi Shi、Pei Gan、Chao Liu、Anxing Ding、Qiuyi Wang、Aiwen Lei
DOI:10.1002/anie.201201050
日期:2012.5.21
Two at once: Xanthones with different functional groups were obtained with CO (balloon) in the presence of a simple catalytic system that consists of Pd(OAc)2, K2S2O8, and trifluoroacetic acid (see scheme). Preliminary mechanism studies reveal that the second CHfunctionalization might be the rate‐determining step.
一次两个:在简单的催化体系(由Pd(OAc)2,K 2 S 2 O 8和三氟乙酸组成)的存在下,用CO(气球)获得具有不同官能团的氧杂蒽。初步的机理研究表明,第二个CH功能化可能是决定速率的步骤。
Effective Utilization of Flow Chemistry: Use of Unstable Intermediates, Inhibition of Side Reactions, and Scale-Up for Boronic Acid Synthesis
作者:Hirotsugu Usutani、David G. Cork
DOI:10.1021/acs.oprd.8b00118
日期:2018.6.15
Flowchemistry processes for boronic acid syntheses utilizing lithiation–borylation have been developed. The side reactions in the lithiation step that occur in batch were suppressed, and unstable lithium intermediates were handled safely. Flow technology was applied to several kinds of boronic acid syntheses, and scale-up was successfully conducted to allow kilogram-scale production. Some of the key
<i>Para</i>-Selective Cu-Catalyzed C–H Aryloxylation of Electron-Rich Arenes and Heteroarenes
作者:Igors Sokolovs、Edgars Suna
DOI:10.1021/acs.joc.5b02728
日期:2016.1.15
Cu-catalyzed reaction of phenols with electron-rich arene or heteroarene ligands of unsymmetrical diaryl-λ3-iodanes is a key step in the developed one-pot two-step method for intermolecular para-selective C–H aryloxylation of heteroarenes and arenes.
A method of producing a diol derivative efficiently and to high purity is provided. Specifically, the present invention relates to a method of producing a diol derivative having, as a fundamental step, a step of obtaining an &agr;-hydroxycarboxylic acid ester by reacting (i) one or more 1,2-diols or (ii) a 1,2-diol and a primary alcohol as starting material(s) with oxygen in the presence of a catalyst comprising metal loaded on a carrier.
THIOXOTHIAZOLIDINE DERIVATIVE HAVING RAS FUNCTION INHIBITORY EFFECT
申请人:Kataoka Tohru
公开号:US20140194412A1
公开(公告)日:2014-07-10
The present invention provides an anticancer drug having a Ras function inhibitory action.
The present invention provides a Ras function inhibitor comprising a compound represented by the formula (I′):
wherein each symbol is as defined in the present specification, or a salt thereof.