33513-40-5Relevant articles and documents
Asymmetric Synthesis Involving Reversible Photodimerization of a Prochiral Flavonoid Followed by Crystallization
Ishikawa, Hiroki,Uemura, Naohiro,Yagishita, Fumitoshi,Baba, Nozomi,Yoshida, Yasushi,Mino, Takashi,Kasashima, Yoshio,Sakamoto, Masami
, p. 6878 - 6881 (2017)
Asymmetric synthesis involving photochemical dimerization of a prochiral flavonoid derivative in solution without any chiral source was achieved. Irradiation of ethyl 6-bromochromonecarboxylate in solution efficiently gave a C2-chiral anti-head-to-head dimer in excellent chemical yield with good quantum efficiency (Φ365 = 0.15). X-ray crystallographic analysis revealed that the dimer crystallized as a conglomerate of C2 space group. The crystalline dimer precipitated upon irradiation of the monomer in solution, and indirect racemization of the dimer through a reversible photoreaction in solution and selective crystallization simultaneously occurred to give the C2-chiral dimer in optically active form with up to 80 % ee. Optically active photoproducts could be obtained by simply irradiating achiral materials in solution without an external chiral source.
3-SPIRO-7-HYDROXAMIC ACID TETRALINS AS HDAC INHIBITORS
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Paragraph 00216, (2016/10/31)
The present invention is directed to compounds of Formulae I and II which are inhibitors of histone deacetylases (HDACs) such as HDAC6, and their use in the treatment of diseases such as cell proliferative diseases (e.g., cancer), neurological (e.g., neurodegenerative disease or neurodevelopmental disease), inflammatory or autoimmune disease, infection, metabolic disease, hematologic disease, or cardiovascular disease.
Synthesis of 6-aryl/heteroaryl-4-oxo-4H-chromene-2-carboxylic ethyl ester derivatives
Fernandes, Carlos,Soares, Pedro,Gaspar, Alexandra,Martins, Daniel,Gomes, Ligia R.,Low, John N.,Borges, Fernanda
, p. 3006 - 3010 (2016/07/06)
The development of new chemical entities represents an important challenge in pharmaceutical industry, being the use of privileged scaffolds for library design and drug discovery a valuable approach. Among the panoply of privileged structures, our researc
HETEROCYCLIC COMPOUNDS AS CALCIUM SENSING RECEPTOR MODULATORS FOR THE TREATMENT OF HYPERPARATHYROIDISM, CHRONIC RENAL FAILURE AND CHRONIC KIDNEY DISEASE
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Page/Page column 52, (2015/11/16)
The invention relates to heterocyclic compounds of Formula (I) and their pharmaceutically acceptable salts, wherein the substituents are as described herein, and their pharmaceutical compositions for use in medicine for the treatment of diseases or disorders associated with the modulation of calcium sensing receptor modulators (CaSR), like e.g. hyperparathyroidism, chronic renal failure and chronic kidney disease and their complications.
An efficient construction of 4-OXO-4H-chromene-2-carboxylate derivatives via one-pot cascade reaction under solvent-free conditions
Huang, Chao,Guo, Jia-Hui,Fu, Huang-Mei,Yuan, Ming-Long,Yang, Li-Juan
, p. 1204 - 1211 (2015/07/15)
An efficient synthetic strategy to chromone derivatives from commercially available diethyl acetylenedicarboxylate and phenols via a one-pot cascade reaction has been developed. Performing the reaction using pyridine and polyphosphoric acid as the catalyst at room temperature and 90°C without any solvent gave the chromone derivatives in good to high yields at one time. A possible reaction pathway was also proposed and supported by the experiment. This protocol is environmentally friendly and metal-free, with advantages including short reaction times, convenient operation, and mild reaction conditions.
Substituted 4H-1-Benzopyran-4-ones (Chromones): Synthesis via Palladium-catalysed Coupling of their Halogeno Derivatives with Alkenes
Davies, Stephen G.,Mobbs, Bryan E.,Goodwin, Christopher J.
, p. 2597 - 2604 (2007/10/02)
Activation of bromochromones has been achieved by Pd0 insertion into the carbon-halogen bond.The resultant species undergo coupling with alkenes leading to vinylated chromones.Vinylation occurs regiospecifically at the original site of bromination and therefore provides a method for the clean introduction of substituents into the chromone ring system.An anomalous reaction of a dibrominated chromone leading to a ring-opened product is described.