64686-65-3Relevant academic research and scientific papers
4-(2,4-BIS(2-HYDROXYPHENYL)-1H-IMIDAZOL-1-YL)BENZOIC ACID DERIVATIVES AS NOVEL IRON CHELATORS
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Page/Page column 57, (2020/10/20)
The invention relates to novel compounds of the general formula (I) pharmaceutical compositions comprising them and the use thereof as medicaments, in particular for the use as iron chelators, more particularly for the use in the prophylaxis and/or treatm
C-H Functionalization via Remote Hydride Elimination: Palladium Catalyzed Dehydrogenation of ortho-Acyl Phenols to Flavonoids
Zhao, Xiaomei,Zhou, Jiabin,Lin, Shuying,Jin, Xukang,Liu, Renhua
supporting information, p. 976 - 979 (2017/03/14)
Although deprotonation of electron-poor C-H bonds to carbon anions with bases has long been known and widely used in organic synthesis, the hydride elimination from electron-rich C-H bonds to carbon cations or partial carbocations for the introduction of nucleophiles is a comparatively less explored area. Here we report that the carbonyl β-C(sp3)-H bond hydrogens of ortho-acyl phenols could be substituted by intramolecular phenolic hydroxyls to form O-heterocycles, followed by dehydrogenation of the O-heterocycle into flavonoids. The cascade reaction is catalyzed by Pd/C without added oxidants and sacrificing hydrogen acceptors.
SAR studies of epoxycurcuphenol derivatives on leukemia CT-CD4 cells
Galindo, José L.G.,Macías, Mariola,Molinillo, José M.G.,Mu?oz-Suano, Alba,Torres, Ascensión,Varela, Rosa M.,García-Cozar, Francisco,Macías, Francisco A.
supporting information, p. 6662 - 6668 (2013/01/15)
Bioactive natural products are a potential source of new pharmaceuticals since they offer new modes of action and more specific activities. The use of derivatization also enables the optimal structure for their biological activity to be determined. In thi
PYRIDAZINONE COMPOUNDS AS CALCILYTICS
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Page/Page column 68, (2010/11/27)
Various calcilytic compounds and pharmaceutical compositions containing these compounds are disclosed. Calcilytic compounds are compounds capable of inhibiting calcium receptor activity. Methods for preparing calcilytic compounds, oral bioavailability of calcilytic compounds, and their use as calcium receptor antagonists are also disclosed.
Asymmetric synthesis of 3,4-dihydrocoumarins by rhodium-catalyzed reaction of 3-(2-hydroxyphenyl)cyclobutanones
Matsuda, Takanori,Shigeno, Masanori,Murakami, Masahiro
, p. 12086 - 12087 (2008/04/11)
3,4-Dihydrocoumarin derivatives were synthesized in a highly enantioselective manner from 3-(2-hydroxyphenyl)cyclobutanones through enantioselective carbon-carbon bond cleavage. A cascade reaction with electron-deficient alkenes introduced a carbon-carbon
Photocyclization Reactions. Part 7 [1]. Solvent and Substituent Effects in the Synthesis of Dihydrobenzofuranols Using Photocyclization of α-(2-Acylphenoxy)toluenes and Ethyl 2-Acylphenoxyacetates
Sharshira, Essam Mohamed,Horaguchi, Takaaki
, p. 1837 - 1849 (2007/10/03)
Photocyclization reactions were carried out on α-(2-acylphenoxy)toluenes 1a-e and 2-acylphenoxyacetates 2a-e in three solvents of different polarity (benzene, acetonitrile and methanol) to examine solvent and substituent effects on the cyclization of 1,5-biradical intermediates to dihydrobenzofuranols. Irradiation of 1a-e in benzene gave cis-dihydrobenzofuranols cis-4b-e selectively in 14-84% yields along with rearranged products, 2-acylbenzophenones 5b-d (23-39% yields). Photocyclization of 1a-e in acetonitrile or methanol gave a mixture of cis- and trans-dihydrobenzofuranols 4a-e in 28-81% yields and small amount of 2-acylbenzophenones 5b-c in 6-12% yields. In polar acetonitrile or methanol, the cis and trans stereoselectivity of dihydrobenzofuranols decreased. The decrease in stereoselectivity was attributed to intermolecular hydrogen bonding between the hydroxyl group of 1,5-biradicals and solvents. On the other hand, irradiation of esters 2a-e in benzene afforded cis-dihydrobenzofuranols cis-13a-e selectively in 48-74% yields. Similarly, photocyclization of 2a-e in acetonitrile or methanol produced dihydrobenzofuranols 13a-e in a fair to good yields. In the photocyclization of 2b-d, not only in nonpolar benzene but also in polar acetonitrile or methanol, increasing the size of alkyl group from methyl (R = Me) to ethyl or isopropyl group (R = Et or i-Pr) gave cu-dibydrobenzofuranols cis-13b-d predominantly. Conformational, solvent and substituent effects on the cyclization of 1,5-biradicals and reaction pathways are discussed.
Triazine derivatives, and pharmaceutical compositions comprising the same
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, (2008/06/13)
New triazine derivatives represented by the formula: STR1 wherein R1 is hydrogen or halogen; R2 is a hydroxy, protected hydroxy, amino, cyano, mercapto, lower alkylthio, arylthio, sulfamoyl, lower alkylsulfonylamino, lower alkylureido, arylureido, lower alkyl-thioureido, aryl-thioureido, lower alkenoylamino, lower alkoxycarbonylamino, lower alkoxy(thiocarbonyl)thio, or cyclic or acyclic alkanoylamino in which the cyclic and acyclic alkanoylamino group may have a substituent selected from lower alkoxy, aryl, hydroxyaryl and protected hydroxyaryl; and X is O or S; and pharmaceutically acceptable salt thereof, which are useful in the treatment of hypertension, thrombosis and ulcer in human beings and animals.
