Palladium-Catalyzed Synthesis of 2-Aryl-<i>2H</i>-Benzotriazoles from Azoarenes and TMSN<sub>3</sub>
作者:Nilufa Khatun、Anju Modi、Wajid Ali、Bhisma K. Patel
DOI:10.1021/acs.joc.5b01706
日期:2015.10.2
Substrate-directed ortho C-H amination of azoarenes using TMSN3 as the source of nitrogen leading to the synthesis of 2-aryl-2H-benzotriazoles has been accomplished with the help of Pd/TBHP combinations. An intermolecular o-azidation (C-N bond formation) followed by an intramolecular N-N bond formation via nucleophilic attack of one of the azo nitrogen onto the o-azide nitrogen leads to cyclization with the expulsion of N-2.
Disclosed are electroluminescent devices that comprise organic layers that contain certain 2H-benzotriazole compounds. The 2H-benzotriazole compounds are suitable components of blue-emitting, durable, organo-electroluminescent layers. The electroluminescent devices may be employed for full color display panels in, for example, mobile phones, televisions and personal computer screens.
Fluorescent Organic Light Emitting Elements Having High Efficiency
申请人:UDC IRELAND LIMITED
公开号:US20170186976A1
公开(公告)日:2017-06-29
The present invention relates to organic light emitting elements, comprising thermally activated delayed fluorescence (TADF) emitters and/or hosts on basis of benzotriazoles, which have a sufficiently small energy gap between S
1
and T
1
(ΔE
ST
) to enable up-conversion of the triplet exciton from T
1
to S
1
. The organic light emitting elements show high electroluminescent efficiency.