Synthesis of bis(trifluoromethylated) pyrazine-containing nitrogen heterocycles from hexafluorobiacetyl and ortho-diamines. Stabilization of the covalent dihydrates of pteridines and pyrido[3,4-b]pyrazines by trifluoromethyl groups
作者:Mark Cushman、Wai Cheong Wong、Adelbert Bacher
DOI:10.1039/p19860001043
日期:——
extent to which trifluoromethyl groups stabilize covalently bound hydrates. The substituted quinoxalines as well as the pyrido[2,3-b]pyrazine (25) and the lumazines (27), (29), and (31) were all found to exist as completely dehydrated aromatic species. Depending on the reaction conditions, both the aromatic form (33) and the stable, neutral covalent dihydrate form (34) could be obtained from the reaction
为了确定三氟甲基基团稳定共价结合的水合物的程度,已经对源自全氟丁烷-2,3-二酮(PFBD)和多种邻二胺的反应产物的结构进行了研究。发现取代的喹喔啉以及吡啶并[2,3- b ]吡嗪(25)和lumazines(27),(29)和(31)均以完全脱水的芳族物质形式存在。取决于反应条件,芳族形式(33)和稳定的中性二价二水合物形式(34))可通过PFBD与4,5-二氨基-6-羟基嘧啶硫酸盐的反应制得(32)。还发现吡啶并[3,4- b ]吡嗪系统(36)和蝶啶(38)以稳定的中性共价二水合物存在,其中吡嗪环被选择性地水合。
Synthesis of 2,3-bis(perfluoroalkyl)quinoxalines and 2,3-bis(perfluoroalkyl)-1,4-benzoxazines from oxides of internal perfluoroolefins
作者:Lyudmila V. Saloutina、Aleksandr Ya. Zapevalov、Victor I. Saloutin、Mikhail I. Kodess、Valentina E. Kirichenko、Marina G. Pervova、Oleg N. Chupakhin
DOI:10.1016/j.jfluchem.2005.05.001
日期:2005.6
The reactions of oxides of internal trans-, cis-perfluoroolefins with o-phenylenediamine and 2-aminophenol in dioxane gave 2,3-bis(perfluoroalkyl)quinoxalines and 2,3-bis(perfluoroalkyl)-2H-1,4-benzoxazin-2-ols respectively in yields of 23–67%. When N,N-dimethylacetamide was used as a solvent an anionic isomerization of the oxides into ketones, which further yielded 2-(perfluoroalkyl)benzimidazoles
ORGANIC ELECTRONIC DEVICES, INCLUDING ORGANIC PHOTOVOLTAIC DEVICES, POLYMERS, AND MONOMERS
申请人:GRENIER Christophe René Gaston
公开号:US20120283377A1
公开(公告)日:2012-11-08
Materials for organic electronic devices including organic photovoltaic devices. An oligomer or polymer comprising:
wherein R
1
, R
2
, R
3
, and R
4
are independently hydrogen or solubilizing groups. Monomers and ink compositions can be also prepared. The materials can be used in an OPV active layer and show excellent absorption properties with bathochromic shift.
3-(Dimethylhydrazono)-1,1,1,4,4,4-hexafluoro-2-butanone as latent perfluorobiacetyl
作者:Yasuhiro Kamitori
DOI:10.1016/s0040-4039(00)01686-5
日期:2000.11
Reaction of trifluoroacetaldehyde dimethylhydrazone with TFAA yielded 3-(dimethylhydrazono)1,1,1,4,4,4-hexafluoro-2-butanone, which could be condensed in situ with diamino compounds to afford 2, 3-bis(trifluoromethyl)quinoxaline, 5,6-bis(trifluoromethyl)pyrazine, and 4,5-bis(trifluoromethyl)-1H-imidazole. (C) 2000 Elsevier Science Ltd. All rights reserved.
Reactions of epoxides derived from internal perfluoroolefins with o-phenylenediamine and 2-aminophenol
作者:L. V. Saloutina、A. Ya. Zapevalov、V. I. Saloutin、M. I. Kodess、V. E. Kirichenko、M. G. Pervova、O. N. Chupakhin
DOI:10.1134/s1070428006040130
日期:2006.4
The reactions of epoxy derivatives of internal perfluoroolefins with o-phenylenediamine and 2-aminophenol in dioxane gave 23-67% of the corresponding 2,3-bis(perfluoroalkyl)quinoxalines and 2,3-bis(perfluoroalkyl)-2H-1,4-benzoxazin-2-ols, respectively. When N,N-dimethylacetamide was used as a solvent, the main reaction pathway was anionic isomerization of epoxides into ketones which were then converted into 2-perfluoroalkylbenzimidazoles (in the reactions with o-phenylenediamine) or 2-hydroxy-N-perfluoroalkanoyl-anilines (in the reactions with 2-aminophenol). The reaction of 3,4-epoxydodecafluorohexane with 2-aminophenol in N,N-dimethylacetamide was accompanied by unusual cyclization to afford 2-pentafluoropropanoyl-2pentafluoroethyl-1,3-benzoxazolidine.