375792-98-6Relevant academic research and scientific papers
Synthesis of mono-functionalized S-diazocines via intramolecular Baeyer-Mills reactions
Schehr, Miriam,Hugenbusch, Daniel,Moje, Tobias,N?ther, Christian,Herges, Rainer
, p. 2799 - 2804 (2018)
Herein we report a reliable method to synthesize mono-functionalized S-diazocines in reproducible yields via intramolecular Baeyer-Mills reactions. Diazocines exhibit excellent photoswitchable properties. As opposed to azobenzenes they are more stable in
Substituted nitrogen-bridged diazocines
Griebenow, Thomas,Herges, Rainer,Lentes, Pascal,Rudtke, Jeremy
supporting information, p. 1503 - 1508 (2021/07/02)
Novel nitrogen-bridged diazocines (triazocines) were synthesized that carry a formyl or an acetyl group at the CH2NR-bridge and bromo- or iodo-substituents at the distant phenyl ring. The photophysical properties were investigated in acetonitrile and water. As compared to previous approaches the yields of the intramolecular azo cyclizations were increased (from ≈40 to 60%) using an oxidative approach starting from the corresponding aniline precursors. The Z→E photoconversion yields in acetonitrile are 80–85% and the thermal half-lives of the metastable E configurations are 31–74 min. Particularly, the high photoconversion yields (≈70%) of the water-soluble diazocines are noteworthy, which makes them promising candidates for applications in photopharmacology. The halogen substituents allow further functionalization via cross-coupling reactions.
Photoswitchable azo‐ and diazocine‐functionalized derivatives of the vegfr‐2 inhibitor axitinib
Heintze, Linda,Schmidt, Dorian,Rodat, Theo,Witt, Lydia,Ewert, Julia,Kriegs, Malte,Herges, Rainer,Peifer, Christian
, p. 1 - 23 (2020/11/30)
In this study, we aimed at the application of the concept of photopharmacology to the approved vascular endothelial growth factor receptor (VEGFR)‐2 kinase inhibitor axitinib. In a previous study, we found out that the photoisomerization of axitinib’s stilbene‐like double bond is unidirectional in aqueous solution due to a competing irreversible [2+2]‐cycloaddition. Therefore, we next set out to azologize axitinib by means of incorporating azobenzenes as well as diazocine moieties as photoresponsive elements. Conceptually, diazocines (bridged azobenzenes) show favorable photoswitching properties compared to standard azobenzenes because the thermodynamically stable Z‐isomer usually is bioinactive, and back isomerization from the bioactive E‐isomer occurs thermally. Here, we report on the development of different sulfur– diazocines and carbon–diazocines attached to the axitinib pharmacophore that allow switching the VEGFR‐2 activity reversibly. For the best sulfur–diazocine, we could verify in a VEGFR‐2 kinase assay that the Z‐isomer is biologically inactive (IC50 >> 10,000 nM), while significant VEGFR‐2 inhibition can be observed after irradiation with blue light (405 nm), resulting in an IC50 value of 214 nM. In summary, we could successfully develop reversibly photoswitchable kinase inhibitors that exhibit more than 40‐fold differences in biological activities upon irradiation. Moreover, we demonstrate the potential advantage of diazocine photoswitches over standard azobenzenes.
Nucleotides and nucleosides and methods for their use in DNA sequencing
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Page/Page column 57; 58, (2015/12/18)
The present invention relates generally to labeled and unlabled cleavable terminating groups and methods for DNA sequencing and other types of DNA analysis. More particularly, the invention relates in part to nucleotides and nucleosides with chemically cleavable, photocleavable, enzymatically cleavable, or non-photocleavable groups and methods for their use in DNA sequencing and its application in biomedical research.
Design, Synthesis, and Biological Activity of 4-[(4-Cyano-2-arylbenzyloxy)-(3-methyl-3H-imidazol-4-yl)methyl]benzonitriles as Potent and Selective Farnesyltransferase Inhibitors
Wang, Le,Wang, Gary T.,Wang, Xilu,Tong, Yunsong,Sullivan, Gerry,Park, David,Leonard, Nicholas M.,Li, Qun,Cohen, Jerry,Gu, Wen-Zhen,Zhang, Haiying,Bauch, Joy L.,Jakob, Clarissa G.,Hutchins, Charles W.,Stoll, Vincent S.,Marsh, Kennan,Rosenberg, Saul H.,Sham, Hing L.,Lin, Nan-Horng
, p. 612 - 626 (2007/10/03)
A novel series of 4-[(4-cyano-2-arylbenzyloxy)-(3-methyl-3H-imidazol-4-yl)methyl]benzonitriles have been synthesized as selective farnesyltransferase inhibitors using structure-based design. X-ray cocrystal structures of compound 20-FTase-HFP and A313326-
Towards synthetic adrenaline receptors - Shape-selective adrenaline recognition in water
Herm, Michael,Molt, Oliver,Schrader, Thomas
, p. 1485 - 1499 (2007/10/03)
In spite of their key role in signal transduction, the mechanism of action of adrenergic receptors is still poorly understood. We have imitated the postulated binding pattern of the large membrane protein with a small, rationally designed synthetic host molecule. Experimental evidence is presented for the simultaneous operation of electrostatic attraction, hydrogen bonds, π stacking, and hydrophobic interactions. By virtue of this combination of weak attractive forces, adrenaline derivatives in water are bound with high shape selectivity for the slim dopamine skeleton. We think that these findings support the postulated cooperative interplay of noncovalent interactions in the natural receptors. In addition, they provide access to a new type of adrenaline sensor. This may be the first step towards an artificial signal-transduction system.
Towards synthetic adrenaline receptors - Shape-selective adrenaline recognition in water
Herm, Michael,Molt, Oliver,Schrader, Thomas
, p. 3148 - 3151 (2007/10/03)
A new rationally designed receptor molecule binds adrenaline derivatives in water. Its binding pattern (see picture) imitates the interplay of noncovalent interactions operating in the natural receptor. High shape selectivity is achieved for the slim dopamine skeleton, and leads to rejection of substrates with an a-substituent, such as amino acid derivatives.
