The invention provides compounds of formula I
wherein R is H or alkyl;
R
1
, R
2
, and R
4
are independently at each occurrence a C
1
-C
20
aliphatic radical, a C
3
-C
20
aromatic radical, or a C
3
-C
20
cycloaliphatic radical; R
3
and R
5
are independently at each occurrence hydrogen, a C
1
-C
20
aliphatic radical, a C
3
-C
20
aromatic radical, or a C
3
-C
20
cycloaliphatic radical; and
a, b and d are independently 0 or an integer ranging from 1 to 3. The invention further provides polymers derived from compounds of formula I, said polymers may be polyesters, polyethers, polycarbonates, polyestercarbonates, polyetherketones, polyethersulfones, and the like. Compounds and polymers of the invention find use in light emitting devices.
Photochemical Synthesis of Complex Carbazoles: Evaluation of Electronic Effects in Both UV‐ and Visible‐Light Methods in Continuous Flow
作者:Augusto C. Hernandez‐Perez、Antoine Caron、Shawn K. Collins
DOI:10.1002/chem.201502661
日期:2015.11.9
An evaluation of both a visible‐light‐ and UV‐light‐mediated synthesis of carbazoles from various triarylamines with differing electronic properties under continuous‐flow conditions has been conducted. In general, triarylamines bearing electron‐rich groups tend to produce higher yields than triarylamines possessing electron‐withdrawing groups. The incorporation of nitrogen‐based heterocycles, as well
CARBAZOLYL POLYMERS FOR ORGANIC ELECTRONIC DEVICES
申请人:Ye Qing
公开号:US20080135806A1
公开(公告)日:2008-06-12
Compositions comprising at least one phosphorescent organometallic compound and a polymer comprising structural units of formula II are useful in organic light emitting devices
wherein R
1
, R
2
, and R
4
are independently at each occurrence a C
1
-C
20
aliphatic radical, a C
3
-C
20
aromatic radical, or a C
3
-C
20
cycloaliphatic radical;
wherein R
3
and R
5
are independently selected from the group consisting of hydrogen, triphenylsilyl, t-butyl, mesityl, diphenyl phosphine oxide, and diphenyl phosphine sulfide; and a, b and d are independently 0 or an integer ranging from 1 to 3.
The invention provides compounds of formula I
wherein R is H or alkyl;
R1, R2, and R4 are independently at each occurrence a C1-C20 aliphatic radical, a C3-C20 aromatic radical, or a C3-C20 cycloaliphatic radical; R3 and R5 are independently at each occurrence hydrogen, a C1-C20 aliphatic radical, a C3-C20 aromatic radical, or a C3-C20 cycloaliphatic radical; and
a, b and d are independently 0 or an integer ranging from 1 to 3. The invention further provides polymers derived from compounds of formula I, said polymers may be polyesters, polyethers, polycarbonates, polyestercarbonates, polyetherketones, polyethersulfones, and the like. Compounds and polymers of the invention find use in light emitting devices.
Photochemical Synthesis of Carbazoles Using an [Fe(phen)<sub>3</sub>](NTf<sub>2</sub>)<sub>2</sub>/O<sub>2</sub> Catalyst System: Catalysis toward Sustainability
作者:Shawn Parisien-Collette、Augusto C. Hernandez-Perez、Shawn K. Collins
DOI:10.1021/acs.orglett.6b02456
日期:2016.10.7
An increasingly sustainable photochemical synthesis of carbazoles was developed using a catalytic system of Fe(phen)(3)(NTf2)(2)/O-2 under continuous flow conditions and was demonstrated on gram scale using a numbering-up strategy. Photocyclization of triaryl and diarylamines into the corresponding carbazoles occurs in general in higher yields than with previously developed photocatalysts.