29147-88-4Relevant articles and documents
Pyrrolopyrrole aza boron dipyrromethene based two-photon fluorescent probes for subcellular imaging
Zhou, Yimin,Ma, Chao,Gao, Nengyue,Wang, Qiong,Lo, Pui-Chi,Wong, Kam Sing,Xu, Qing-Hua,Kinoshita, Takumi,Ng, Dennis K. P.
, p. 5570 - 5581 (2018/09/25)
A series of pyrrolopyrrole aza boron dipyrromethene derivatives have been designed and synthesised as two-photon fluorescent probes. The bisalkynyl analogues, having a donor-π-donor quadrupolar skeleton, show a red-shifted Q band at ca. 700 nm in toluene and a two-photon absorption (TPA) cross-section up to 2349 GM at 1040 nm. To enable these dyes to be used for subcellular imaging, a branched oligoethylene glycol unit has been introduced to enhance their hydrophilicity and biocompatibility, and a potential organelle-selective group, namely triphenylphosphonium or morpholine moiety has also been added with a view to targeting the mitochondria or lysosomes respectively. The resulting conjugates are essentially non-aggregated in deionised water, exhibiting an intense Q band at 668 nm and a TPA cross-section up to 384 GM at 1040 nm. These spectral features have been analysed using density functional theory calculations, which suggest that the TPA is mainly due to the S0 → S2 transition. In the subcellular imaging study, it has been found that the triphenylphosphonium-containing derivative can localise in the lysosomes of HeLa human cervical carcinoma cells, which may be a result of its positive charge and the negative logP value (-2.46, P = partition coefficient), while the morpholine-substituted analogue does not exhibit preferential subcellular localisation.
NOVEL GLP-1 RECEPTOR MODULATORS
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Paragraph 00410; 00443, (2015/01/09)
Compounds are provided that modulate the glucagon-like peptide 1 (GLP-1) receptor, as well as methods of their synthesis, and methods of their therapeutic and/or prophylactic use. Such compounds can act as modulators or potentiators of GLP-1 receptor on their own, or with incretin peptides such as GLP-1(7-36) and GLP-1(9-36), or with peptide-based therapies, such as exenatide and liraglutide, and have the following general structure (where "()" represents either or both the R and S form of the compound): where A, B, C, Y1, Y2, Z, R1, R2, R3, R4, R5, W1, n, p and q are as defined herein.
Polymer-bound triphenylphosphine as traceless reagent for Mitsunobu reactions in combinatorial chemistry: Synthesis of aryl ethers from phenols nad alcohols
Tunoori, Ashok Rao,Dutta, Dinah,Georg, Gunda I.
, p. 8751 - 8754 (2007/10/03)
The synthesis of aryl ethers from phenols and alcohols using polymer- bound triphenylphosphine and diethyl azodicarboxylate (DEAD) is described. The polymer-bound triphenylphosphines are easily removed by filtration from the reaction products. This method