‐1,1’‐biaryls. Various 9‐(arylamino)aryl‐9H‐carbazoles could be synthesized from aryl(haloaryl)amines and 9H‐carbazole derivatives in high yields by the use of tBu‐XPhos. The amination of 4‐bromotoluene with a mixture of diphenylamine and 9H‐carbazole gave only 9‐o‐tolyl‐9H‐carbazole with tBu‐XPhos, while the use of PtBu3 or XPhos afforded the mixture of 9‐o‐tolyl‐9H‐carbazole and diphenyl(o‐tolyl)amine
研究了钯与9 H-咔唑衍生物的芳基(卤代芳基)胺的胺化反应。在使用Pd 2(dba)3 / P t Bu 3 / NaO t Bu催化剂与9 H-咔唑胺化(4-溴苯基)苯胺中,主要产物为9- [4-(苯基氨基)苯基] -9 H-咔唑,收率60%,其中(4-溴苯基)苯胺转化率> 99%,并伴随形成9- [4- [苯基[4- [苯基[4-(苯基氨基)苯基]氨基]苯基] -9 H观察到连续产生的副产物咔唑(产率为15%)。使用XPhos代替P t Bu 3时,以81%的收率提供所需的产品,并将连续的副产品抑制到7.7%。通过使用t Bu‐XPhos ,所需产品的收率达到98%。用其他2-二叔丁基或2-二(1-金刚烷基)膦基-1,1'-联芳基也获得了如此优异的所需产品收率。可以通过使用t Bu-XPhos从芳基(卤代芳基)胺和9 H-咔唑衍生物高产率合成各种9-(芳基氨基)芳基-9 H-咔唑。用二苯胺和9
Facile Synthesis of Spirocyclic Aromatic Hydrocarbon Derivatives Based on <i>o</i>-Halobiaryl Route and Domino Reaction for Deep-Blue Organic Semiconductors
naphthalene- and pyrene-containing spirofluorenes. Two pyrene substituents were installed using a Suzuki cross-coupling reaction to produce a series of spirofluorene-functionalized polycyclic aromatichydrocarbon derivatives, DPSBFF, DPSIPF, DPSDBXF, and DPSFX. A preliminary spin-coated device based on DPSFX:PVK blends exhibits a low turn-on voltage of 4.3 V and deep-blue emission with a current efficiency
已经开发了常规的邻卤代二芳基和一锅串联方案以合成含萘和pyr的螺芴。使用Suzuki交叉偶联反应安装两个pyr取代基,以产生一系列螺芴官能化的多环芳烃衍生物DPSBFF,DPSIPF,DPSDBXF和DPSFX。基于DPSFX:PVK共混物的初步旋涂设备显示出4.3 V的低启动电压和深蓝光发射,电流效率为1.1 cd / A。
New Access to Six-Membered Phosphacycle Annulated Polyaromatic Ring System
A facile access to six‐membered phosphacycle annulated polyaromatic ringsystem through Ag‐catalyzed intramolecular C–P bond formation reaction, from easily accessible phosphine oxides, has been developed, Several new heteroatoms fused π‐conjugated molecules were synthesized from this procedure with their structures confirmed by X‐ray structure analysis.
A new synthetic route toward the synthesis of benzo[b]phospholes- and benzo[b]siloles-fused pyrenes using a transition metal-catalyzed C–H bond activation is described. The compounds were fully characterized including X-ray diffraction. A combined experimental and theoretical study shows that both the heteroatom and the substitution pattern impact the optical and redox properties.