Exogenous-oxidant-free electrochemical oxidative C–H phosphonylation with hydrogen evolution
作者:Yong Yuan、Jin Qiao、Yangmin Cao、Jingmei Tang、Mengqin Wang、Guojuan Ke、Yichen Lu、Xue Liu、Aiwen Lei
DOI:10.1039/c9cc00975b
日期:——
We herein report a versatile and environmentally friendly electrochemical oxidative C–H phosphonylation protocol.
我们在此报告一种通用且环境友好的电化学氧化C-H磷酰化协议。
Electrochemically dehydrogenative C–H/P–H cross-coupling: effective synthesis of phosphonated quinoxalin-2(1<i>H</i>)-ones and xanthenes
作者:Ke-Jing Li、Yang-Ye Jiang、Kun Xu、Cheng-Chu Zeng、Bao-Guo Sun
DOI:10.1039/c9gc01474h
日期:——
phosphonation of quinoxalin-2(1H)-ones and C(sp3)–H phosphonation of xanthenes has been developed. The chemistry was performed in an undivided cell under constant current conditions and features a wide range of substrates, up to 99% yield and it is free of transition-metal catalysts- and external oxidants, thereby providing a straightforward approach for dehydrogenativeC–H/P–H cross-coupling. In addition
已开发出一种有效的电化学方法,用于喹喔啉-2(1 H)-酮的C(sp 2)-H磷酸化和x吨的C(sp 3)-H磷酸化。该化学反应是在恒定电流条件下在一个未分开的电池中进行的,具有多种底物,产率高达99%,并且不含过渡金属催化剂和外部氧化剂,从而为CH / H /脱氢提供了直接的方法P–H交叉耦合。另外,对照实验表明,某些反应可能涉及自由基途径。
Visible light irradiated photocatalytic C(sp<sup>3</sup>)–H phosphorylation of xanthenes and 9,10-dihydroacridines with P(O)–H compounds
Photocatalytic C(sp3)–H phosphorylation of xanthenes and 9,10-dihydroacridines with P(O)–Hcompounds under the irradiation of 18 W blue LEDs at room temperature using fluorescein as the photocatalyst and molecular oxygen (O2) as the sole oxidant has been achieved. The newly developed reaction provides direct access to 9-phosphorylated xanthene derivatives with good functional group compatibility.
以荧光素为光催化剂,分子氧 (O 2 ) 为光催化剂,室温下 18 W 蓝光 LED 照射下,氧杂蒽和 9,10-二氢吖啶与 P(O)-H 化合物的光催化 C(sp 3 )–H磷酸化已实现唯一氧化剂。新开发的反应可以直接获得具有良好官能团相容性的9-磷酸化呫吨衍生物。