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。
Buckyball as an Electron Donor in a Dyad of C
<sub>60</sub>
and Xanthene Dye
By coupling a stronger electron acceptor xanthylium to the typical electron acceptor fullerene C60, photoinduced electron transfer with the fullerene as the electrondonor was achieved, and the dynamics of fullerene radical cation formation was analyzed by transient absorption spectroscopy.
通过将更强的电子受体 xanthylium 耦合到典型的电子受体富勒烯 C 60,实现了以富勒烯作为电子供体的光诱导电子转移,并通过瞬态吸收光谱分析了富勒烯自由基阳离子形成的动力学。
ORGANIC LIGHT-EMITTING DEVICE
申请人:Horiuchi Takayuki
公开号:US20130037791A1
公开(公告)日:2013-02-14
An organic light-emitting device that achieves highly efficient emission and low-voltage operation is provided. The organic light-emitting device contains a 9H-xanthen-9-one derivative.
Palladium-Catalyzed Carbonylative Homocoupling of 2-Iodophenols for the Synthesis of Symmetrical Xanthones
作者:Bhalchandra M. Bhanage、Manjunath S. Lokolkar
DOI:10.1055/a-2123-9288
日期:2023.12
report the palladium-catalyzed carbonylative synthesis of symmetrical xanthones from functionalized 2-iodophenols in a one-pot manner. The protocol involves homocoupling of 2-iodophenols using Pd catalyst, Cs2CO3 as base, with gaseous CO as C1 building block. The simple, ligand- and additive-free strategy provides moderate to good yields of symmetrical xanthones. The reaction was also examined with the
在此,我们报道了钯催化一锅法从功能化 2-碘酚羰基化合成对称呫吨酮。该方案涉及使用 Pd 催化剂、Cs 2 CO 3作为碱、以气态 CO 作为 C1 结构单元对 2-碘酚进行自偶联。这种简单、无配体和添加剂的策略提供了中等至良好的对称呫吨酮产率。还用 2-羟基苯基硼酸作为另一种偶联配偶体的组合来检查该反应。此外,通过改变反应条件,该方案被扩展用于芳基和烷基水杨酸酯衍生物的合成。
Sen; Sen Gupta, Journal of the Indian Chemical Society, 1955, vol. 32, p. 619