364002

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Analysis of leucine enkephalin by high-performance liquid chromatography using enzymatic derivatization by tyrosinase and electrochemical or fluorescence detection.

V Larsimont et al.

Journal of pharmaceutical and biomedical analysis, 19(6), 855-864 (2000-03-04)

Two tyrosine specific, HPLC methods with either electrochemical (HPLC-ED) or fluorescence (HPLC-FL) detection are described for leucine-enkephalin (LE) in cerebrospinal fluid (CSF). Both approaches involve the hydroxylation of the Tyr1-moiety of LE by mushroom tyrosinase. Production of a catechol permitted

NMDA receptor affinities of 1,2-diphenylethylamine and 1-(1,2-diphenylethyl)piperidine enantiomers and of related compounds.

Michael L Berger et al.

Bioorganic & medicinal chemistry, 17(9), 3456-3462 (2009-04-07)

We resolved 1,2-diphenylethylamine (DPEA) into its (S)- and (R)-enantiomer and used them as precursors for synthesis of (S)- and (R)-1-(1,2-diphenylethyl)piperidine, flexible homeomorphs of the NMDA channel blocker MK-801. We also describe the synthesis of the dicyclohexyl analogues of DPEA. These

Mukaiyama, T.

Aldrichimica Acta, 29, 59-59 (1996)

Room temperature magnetoelectric coupling in a molecular ferroelectric ytterbium(III) complex.

Jérôme Long et al.

Science (New York, N.Y.), 367(6478), 671-676 (2020-02-08)

Magnetoelectric (ME) materials combine magnetic and electric polarizabilities in the same phase, offering a basis for developing high-density data storage and spintronic or low-consumption devices owing to the possibility of triggering one property with the other. Such applications require strong

Multiple UDP-glucuronosyltransferases in human liver microsomes glucuronidate both R- and S-7-hydroxywarfarin into two metabolites.

C Preston Pugh et al.

Archives of biochemistry and biophysics, 564, 244-253 (2014-12-03)

The widely used anticoagulant Coumadin (R/S-warfarin) undergoes oxidation by cytochromes P450 into hydroxywarfarins that subsequently become conjugated for excretion in urine. Hydroxywarfarins may modulate warfarin metabolism transcriptionally or through direct inhibition of cytochromes P450 and thus, UGT action toward hydroxywarfarin

Chenier, P.J. et al.

Tetrahedron Letters, 38, 7341-7341 (1997)

A new fluorogenic assay for tyrosine-containing peptides.

M Tellier et al.

Journal of pharmaceutical and biomedical analysis, 9(7), 557-563 (1991-01-01)

A new tyrosine-specific LC assay with pre-column fluorogenic derivatization is described for Tyr-Gly as model peptide. o-Hydroxylation of the tyrosine residue with tyrosinase in the presence of ascorbic acid, followed by oxidation to the corresponding quinone by potassium ferricyanide at

(S,S)-1,2-Diphenylethylenediamine

Chiral Reagents for Asymmetric Synthesis (2003)

Diphenylethanediamine (DPEDA) as chiral selector: VII. Efficient HPLC resolution of a series of underivatized diarylcarbinols on a chiral stationary phase based on C5-amide-bonded N-3,5-dinitrobenzyl-DPEDA.

N M Maier et al.

Chirality, 8(7), 490-493 (1996-01-01)

Fast and efficient baseline separation of asymmetrically substituted diarylmethanols and 1,1-diarylethanols was achieved on an endcapped, amide-linked N-3,5-dinitrobenzoylated, (R,R)-1,2-diphenyl-1,2-ethanediamine-derived chiral stationary phase (CSP). Optimal enantioselectivities on this CSP were obtained using 1% 2-propanol in n-heptane as the mobile phase. Enantiorecognition

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