Metal-Free Synthesis of 2-Arylbenzothiazoles from Aldehydes, Amines, and Thiocyanate
作者:Amrita Dey、Alakananda Hajra
DOI:10.1021/acs.orglett.9b00245
日期:2019.3.15
A highly efficient method for the synthesis of 2-arylbenzothiazoles has been developed using readily available aromatic amines, benzaldehydes, and NH4SCN as a sulfur source. A library of 2-arylbenzothiazoles with wide functional group compatibility has been synthesized in good yields through iodine-mediated oxidative annulation.
Iron-Promoted Three-Component 2-Substituted Benzothiazole Formation via Nitroarene <i>ortho</i>-C–H Sulfuration with Elemental Sulfur
作者:Qiaoyan Xing、Yanfeng Ma、Hao Xie、Fuhong Xiao、Feng Zhang、Guo-Jun Deng
DOI:10.1021/acs.joc.8b02619
日期:2019.2.1
A three-component procedure for the preparation of 2-substituted benzothiazoles from nitroarenes, alcohols, and sulfur powder is described. The reaction showed a good functional group tolerance to provide the heterocyclic products in moderate to good yields. The sequential assembly involving nitro reduction, C–N condensation, and C–S bond formation has been realized in one pot.
An efficient synthetic route to biologically relevant 2-phenylbenzothiazoles substituted on the benzothiazole ring
作者:Ashley A. Weekes、Mark C. Bagley、Andrew D. Westwell
DOI:10.1016/j.tet.2011.08.004
日期:2011.10
focus on their unsubstituted ring counterparts. Here we describe a new concise and efficient synthetic route to biologically relevant 2-phenylbenzothiazoles in high yield from the reaction of substituted 2-aminothiophenol disulfides and benzaldehydes, promoted by the inexpensive and non-toxic inorganic oxidant sodiummetabisulfite in DMSO at 120 °C. Our new method is tolerant of a range of substituents
PHENANTHROLINE COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
申请人:Yen Feng-Wen
公开号:US20080265746A1
公开(公告)日:2008-10-30
The present invention discloses a phenanthroline compound which can be used as electron-transporting material in organic electroluminescence devices is disclosed. The mentioned phenanthroline compound is represented by the following.
wherein Ar is selected from the group consisting of hydrogen atom, alkyl, aryl, wherein R
1
, R
2
and R
3
are identical or different. R
1
, R
2
and R
3
are independently selected from the group consisting of hydrogen atom, alkyl, halide, wherein X
1
, X
2
and X
3
are identical or different. X
1
, X
2
and X
3
are independently selected from the atom or group consisting of O, S, N—R
4
and R
4
is selected from the group consisting of hydrogen atom, alkyl, aryl.