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Methylenebisnicotiflorin: a rare methylene-bridged bisflavonoid glycoside from ripe Pu-er tea.
Tao MK, Xu M, Zhang H, Chen H, Liu C, Zhu HT, Wang D, Yang CR, Zhang YJ. Tao MK, et al. Nat Prod Res. 2016;30(7):776-82. doi: 10.1080/14786419.2015.1065491. Epub 2015 Aug 14. Nat Prod Res. 2016. PMID: 26273895
Among them, 1,3-dihydroxyphenyl-2-O-sulfate (13), 2,3,4-trihydroxybenzoic acid (16) and 3,3',4,4'-tetrahydroxybiphenyl (18) are reported from tea plants for the first time....
Among them, 1,3-dihydroxyphenyl-2-O-sulfate (13), 2,3,4-trihydroxybenzoic acid (16) and 3,3',4,4'-tetrahydroxybiphenyl (18) are repor …
Synthesis of tetrahydroxybiphenyls and tetrahydroxyterphenyls and their evaluation as amyloid-β aggregation inhibitors.
Stevens CB, Hanna JM Jr, Lammi RK. Stevens CB, et al. Bioorg Med Chem Lett. 2013 Mar 15;23(6):1703-6. doi: 10.1016/j.bmcl.2013.01.076. Epub 2013 Feb 4. Bioorg Med Chem Lett. 2013. PMID: 23403086 Free PMC article.
3,3',4,4'-Tetrahydroxybiphenyl and three isomeric 3,3",4,4"-tetrahydroxyterphenyls with varying geometries around the central phenyl ring have been synthesized and evaluated for their in vitro activity against aggregation of Alzheimer's amyloid-beta peptide (Abeta). ...For …
3,3',4,4'-Tetrahydroxybiphenyl and three isomeric 3,3",4,4"-tetrahydroxyterphenyls with varying geometries around the central phenyl …
Structure and ultrafast dynamics of the charge-transfer excited state and redox activity of the ground state of mono- and binuclear platinum(II) diimine catecholate and bis-catecholate complexes: a transient absorption, TRIR, DFT, and electrochemical study.
Best J, Sazanovich IV, Adams H, Bennett RD, Davies ES, Meijer AJ, Towrie M, Tikhomirov SA, Bouganov OV, Ward MD, Weinstein JA. Best J, et al. Inorg Chem. 2010 Nov 1;49(21):10041-56. doi: 10.1021/ic101344t. Inorg Chem. 2010. PMID: 20873855
A series of mononuclear complexes of the type [Pt(Bu(2)cat)(4,4'-R(2)-bipy)] [where Bu(2)cat is the dianion of 3,5-(t)Bu(2)-catechol and R = H, (t)Bu, or C(O)NEt(2)] and analogous dinuclear complexes based on the "back-to-back" bis-catechol ligand 3,3',4,4'-tetrahydroxybipheny …
A series of mononuclear complexes of the type [Pt(Bu(2)cat)(4,4'-R(2)-bipy)] [where Bu(2)cat is the dianion of 3,5-(t)Bu(2)-catechol and R = …
Benzidine photodegradation: a mass spectrometry and UV spectroscopy combined study.
Madeira P, Nunes MR, Borges C, Costa FM, Florêncio MH. Madeira P, et al. Rapid Commun Mass Spectrom. 2005;19(14):2015-20. doi: 10.1002/rcm.2019. Rapid Commun Mass Spectrom. 2005. PMID: 15962360
Moreover, the MS analysis enabled us to propose the following three degradation products/intermediates: 4'-nitro-4-biphenylamine, tetrahydroxybiphenyl and 4,4'-dinitrobiphenyl. For the benzidine molecular ion and protonated molecule and for the protonated molecules of the …
Moreover, the MS analysis enabled us to propose the following three degradation products/intermediates: 4'-nitro-4-biphenylamine, tetrahy …
Determination of marker constituents from Cissus quadrangularis Linn. and their quantitation by HPTLC and HPLC.
Mehta M, Kaur N, Bhutani KK. Mehta M, et al. Phytochem Anal. 2001 Mar-Apr;12(2):91-5. doi: 10.1002/pca.569. Phytochem Anal. 2001. PMID: 11705245
Four marker constituents, namely, onocer-7-ene-3 alpha, 21 beta-diol, delta-amyrin, delta-amyrone and 3,3',4,4'-tetrahydroxybiphenyl of an Ayurvedic crude drug Cissus quadrangularis Linn. are defined for standardisation purposes. 3,3',4,4'-Tetrahydroxybiphenyl has b …
Four marker constituents, namely, onocer-7-ene-3 alpha, 21 beta-diol, delta-amyrin, delta-amyrone and 3,3',4,4'-tetrahydroxybiphenyl …
Charge distribution in bis-dioxolene radical metal complexes. synthesis and DFT characterization of dinuclear Co(III) and Cr(III) complexes with a mixed-valent, S = 1/2 semiquinone-catecholate ligand.
Bencini A, Daul CA, Dei A, Mariotti F, Lee H, Shultz DA, Sorace L. Bencini A, et al. Inorg Chem. 2001 Mar 26;40(7):1582-90. doi: 10.1021/ic0007052. Inorg Chem. 2001. PMID: 11261968
Bis-dioxolene bridged dinuclear metal complexes of general formula M2(CTH)2(diox-diox)(PF6)n (n = 2, 3; M = Co(III), Cr(III); CTH = tetraazamacrocycle) have been synthesized using the bis-bidentate ligand 5,5'-di-tert-butyl-3,3',4,4'-tetrahydroxybiphenyl. These complexes w …
Bis-dioxolene bridged dinuclear metal complexes of general formula M2(CTH)2(diox-diox)(PF6)n (n = 2, 3; M = Co(III), Cr(III); CTH = tetraaza …
Asymmetric synthesis of axially chiral biaryls via desymmetrization of 2,2',6,6'-tetrahydroxybiphenyl using 1,4-Di-O-benzyl-L-threitol as a chiral template.
Tuyet TM, Harada T, Hashimoto K, Hatsuda M, Oku A. Tuyet TM, et al. J Org Chem. 2000 Mar 10;65(5):1335-43. doi: 10.1021/jo991364g. J Org Chem. 2000. PMID: 10814093
Sequential etherification of 2,2',6,6'-tetrahydroxybiphenyl (1) with 1,4-di-O-benzyl-L-threitol under Mitsunobu conditions gives desymmetrized biphenyldiol 9 of S-axial chirality exclusively. ...
Sequential etherification of 2,2',6,6'-tetrahydroxybiphenyl (1) with 1,4-di-O-benzyl-L-threitol under Mitsunobu conditions gives desy …
Asymmetric desymmetrization of 2,2',6,6'-tetrahydroxybiphenyl through annulation with enantiomerically pure bis(mesylate).
Harada T, Tuyet TM, Oku A. Harada T, et al. Org Lett. 2000 May 4;2(9):1319-22. doi: 10.1021/ol0057840. Org Lett. 2000. PMID: 10810737
[formula: see text] 2,2',6,6'-Tetrahydroxybiphenyl undergoes a facile annulation reaction with bis(mesylate) derived from (S)-1,2-propanediol in the presence of Cs2CO3 to give the corresponding asymmetric desymmetrization product of S axial chirality with exclusive diaster …
[formula: see text] 2,2',6,6'-Tetrahydroxybiphenyl undergoes a facile annulation reaction with bis(mesylate) derived from (S)-1,2-pro …
Metabolism of Hydroxydibenzofurans, Methoxydibenzofurans, Acetoxydibenzofurans, and Nitrodibenzofurans by Sphingomonas sp. Strain HH69.
Harms H, Wilkes H, Wittich R, Fortnagel P. Harms H, et al. Appl Environ Microbiol. 1995 Jul;61(7):2499-505. doi: 10.1128/aem.61.7.2499-2505.1995. Appl Environ Microbiol. 1995. PMID: 16535067 Free PMC article.
From turnover experiments with the mutant HH69/II, which is deficient in meta-cleavage, 2,2(prm1),3,4(prm1)-tetrahydroxybiphenyl, 2,2(prm1),3-trihydroxy-5(prm1)-methoxybiphenyl, 2,2(prm1),3-trihydroxy-5(prm1)-nitrobiphenyl, and 2,2(prm1),3-trihydroxy-4(prm1)-nitrobiphenyl …
From turnover experiments with the mutant HH69/II, which is deficient in meta-cleavage, 2,2(prm1),3,4(prm1)-tetrahydroxybiphenyl, 2,2 …
12 results