Ketopyrroles useful as ligands in organic iridium compositions
申请人:Chichak Kelly Scott
公开号:US20080027028A1
公开(公告)日:2008-01-31
The present invention provides novel ketopyrroles having structure XXIV
wherein R
2
is independently at each occurrence a deuterium atom, a halogen, a nitro group, an amino group, a C
3
-C
40
aromatic radical, a C
1
-C
50
aliphatic radical, or a C
3
-C
40
cyclcoaliphatic radical; “a” is an integer from 0 to 3; and X
1
and X
2
are independently at each occurrence a bromine atom, a hydroxy group, or the group OR
10
, and wherein the group R
10
is independently at each occurrence a deuterium atom, a halogen, a nitro group, an amino group, a C
3
-C
40
aromatic radical, a C
1
-C
50
aliphatic radical, or a C
3
-C
40
cyclcoaliphatic radical. Ketopyrroles XXIV are useful ligands for the preparation of Type (1) and Type (2) organic iridium compositions. In one aspect, the present invention provides deuterated analogs of XXIV. Organic iridium compositions are useful in the preparation optoelectronic devices, such as OLED devices and photovoltaic devices exhibiting enhanced performance characteristics.
We have developed a concise diastereoselective total synthesis of (±)-parvistemonine A. By using a Mukaiyama–Michael addition, an aza-Wittig reaction, a Paal–Knorr pyrrole synthesis, an acid-mediated annulation, and a Mitsunobu reaction as key steps, we achieved a total synthesis in which the longest linear sequence was ten steps and the overall yield was 19.6%. Additionally, the relative stereochemistry
我们开发了一种简洁的 (±)-parvistemonine A 的非对映选择性全合成。 通过使用 Mukaiyama-Michael 加成、aza-Wittig 反应、Paal-Knorr 吡咯合成、酸介导的环化和 Mitsunobu 反应作为关键步骤,我们实现了最长的线性序列为十步的全合成,总产率为19.6%。此外,首次通过 X 射线晶体学分析证实了 parvistemonine A 的相对立体化学。
Neutrophil‐Selective Fluorescent Probe Development through Metabolism‐Oriented Live‐Cell Distinction
reported. Herein, we report the first fluorescentprobe NeutropG for the specific distinction and imaging of active neutrophils. The selective staining mechanism of NeutropG is elucidated as metabolism-oriented live-cell distinction (MOLD) through lipid droplet biogenesis with the help of ACSL and DGAT. Finally, NeutropG is applied to accurately quantify neutrophil levels in fresh blood samples by showing
Antimalarial Activity of Natural and Synthetic Prodiginines
作者:Kancharla Papireddy、Martin Smilkstein、Jane Xu Kelly、Shweta、Shaimaa M. Salem、Mamoun Alhamadsheh、Stuart W. Haynes、Gregory L. Challis、Kevin A. Reynolds
DOI:10.1021/jm200543y
日期:2011.8.11
Prodiginines are a family of linear and cyclic oligopyrrole red-pigmented compounds. Herein we describe the in vitro antimalarial activity of four natural (IC50 = 1.7–8.0 nM) and three sets of synthetic prodiginines against Plasmodium falciparum. Set 1 compounds replaced the terminal nonalkylated pyrrole ring of natural prodiginines and had diminished activity (IC50 > 2920 nM). Set 2 and set 3 prodiginines
The formation of acylimino-derivatives of indoles and pyrroles by reactions with nitrilium salts
作者:Stephen C. Eyley、Robert G. Giles、Harry Heaney
DOI:10.1016/s0040-4039(00)98776-8
日期:1985.1
fluoroborates are prepared rapidly by warming trimethyloxonium fluoroborate with a slight excess of the nitrile, subsequent addition of indoles and pyrroles at low temperatures (−50° to −20°) gives iminium salts (and hence ketones) in high yields.