Výsledky vyhledávání - "Dave R. van Staveren"

Rapid quantification of free and glucuronidated THCCOOH in urine using coated well plates and LC–MS/MS analysis

Autor: Wolfgang Weinmann, Stefan König, Marianne Hädener, Dave R van Staveren

Aim: Generally, urine drug testing for cannabis abuse involves measuring total concentrations of 11-nor-9-carboxy-Δ9-tetrahydrocannabinol (THCCOOH) obtained by enzymatic and/or alkaline hydrolysis of THCCOOH-glucuronide. As hydrolysis can be inconsi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f62dc7249232b10ed4243c54c6954320

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Structures of the b‐ and d‐Acid Derivatives of Vitamin B12and Their Complexes with [M(CO)3]+(M =99mTc, Re)

Autor: Roger Alberto, Dave R. van Staveren, Pilar Ruiz-Sánchez, Stefan Mundwiler, Bernhard Spingler

Publikováno v: European Journal of Inorganic Chemistry. 2007:2641-2647

The acid hydrolysis of natural vitamin B-12 yields several products in which the acetamide or propionamide side chains on the corrin framework are converted into the corresponding acids. These acids can be derivatised with further functionalities. We

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db1c3695e9f398ecd2b6d44fc7c64442
https://doi.org/10.1002/ejic.200601195

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S-Functionalized Cysteine: Powerful Ligands for the Labelling of Bioactive Molecules with Triaquatricarbonyltechnetium-99m(1+) ([99mTc(OH2)3(CO)3]+)

Autor: Jae-Kyoung Pak, Paul Benny, Roger Alberto, Robert Waibel, Dave R. van Staveren, Philipp Kurz

Publikováno v: Helvetica Chimica Acta. 88:447-460

S-Alkylated cysteines are used as efficient tridentate N,O,S-donor-atom ligands for the fac-[M(CO)3]+ moiety (M=99mTc or Re). Reaction of (Et4N)2[ReBr3(CO)3] (3) with the model S-benzyl-L-cysteine (2) leads to the formation of [Re(2′)(CO)3] (4) as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd6e1c3bf699dcbc09380425f8a2338e
https://doi.org/10.1002/hlca.200590029

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Conjugates of vitamin B12 with Nε-functionalized histidine for labeling with [99mTc(OH2)3(CO)3]+: synthesis and biodistribution studies in tumor bearing mice

Autor: Dave R. van Staveren, Stefan Mundwiler, P. August Schubiger, Roger Alberto, Robert Waibel

Publikováno v: Journal of Organometallic Chemistry. 689:4803-4810

In this work, histidine derivatives bearing an acetic acid or a propyl amine substituent on the N e -atom are conjugated to the b -acid, c -acid and d -acid moiety of cyanocobalamin (vitamin B12) via amide formation. Four different derivatives were p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7c4186790b63b7d3bd5fd7658e6cf3e
https://doi.org/10.1016/j.jorganchem.2004.09.050

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Circular Dichroism Spectroelectrochemical Investigations on the Fluxional Diamagnetic and Paramagnetic Organometallic Complexes [Mo(His-Nε-C2H4COOCH3)(2-R-allyl)(CO)2]n+ (R = H, Me; His = O,N,Nδ-l-Histidinate; n = 0, 1)

Autor: Dave R. van Staveren, Nils Metzler-Nolte, and Eberhard Bothe

Publikováno v: Organometallics. 22:3102-3106

The optical and chiroptical properties of Mo(His-Ne-C2H4COOCH3)(allyl)(CO)2 (1) and Mo(His-Ne-C2H4COOCH3)(2-methylallyl)(CO)2 (2) (His = O,N,Nδ-l-histidinate, allyl = η-C3H5) and their one-electron-oxidized derivatives 1+ and 2+ are presented. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba81588f07b1b1b15e2924241d1cfd0a
https://doi.org/10.1021/om0300833

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Spectroscopic Properties, Electrochemistry, and Reactivity of Mo0, MoI, and MoII Complexes with the [Mo(bpa)(CO)3] Unit [bpa = bis(2-picolyl)amine] and Their Application for the Labelling of Peptides

Autor: Eberhard Bothe, Thomas Weyhermüller, Nils Metzler-Nolte, Dave R. van Staveren

Publikováno v: European Journal of Inorganic Chemistry. 2002:1518-1529

The synthesis of the complexes [Mo(bpa)(CO)3] (1) and [Mo(Bz-bpa)(CO)3] (2) [bpa = bis(2-picolyl)amine; Bz-bpa = N-benzylbis(2-picolyl)amine] is described. These compounds have been characterized by spectroscopic techniques including multinuclear NMR

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::848a30d09a469a9ebc04edbc3aca7ac1
https://doi.org/10.1002/1099-0682(200206)2002:6<1518::aid-ejic1518>3.0.co

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Fluxional Processes in Diamagnetic and Paramagnetic Allyl Dicarbonyl and 2-Methylallyl Dicarbonyl Molybdenum Histidinato Complexes as Revealed by Spectroscopic Data and Density Functional Calculations

Autor: Nils Metzler-Nolte, Eberhard Bothe, Michael Bühl, Dave R. van Staveren, Eckhard Bill, Thomas Weyhermüller

Publikováno v: Chemistry - A European Journal. 8:1649-1662

This work describes a detailed study on the structure and dynamics of pseudooctahedral low-valent complexes of the type [Mo(His-N(epsilon)-R)(eta-2-R'-allyl)(CO)(2)] (His=N(delta),N,O-L-histidinate; R=H, R'=H (1); R=C(2)H(4)CO(2)Me, R'=H (2); R=H, R'

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8dc18c28b9a566a32aec348acb5940f5
https://doi.org/10.1002/1521-3765(20020402)8:7<1649::aid-chem1649>3.0.co

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Increase in coordination number of lanthanide complexes with 2,2′-bipyridine and 1,10-phenanthroline by using β-diketonates with electron-withdrawing groups

Autor: Gerard A. van Albada, Huub Kooijman, Jaap G. Haasnoot, P. J. Nieuwenhuizen, Anna Maria Manotti Lanfredi, Franco Ugozzoli, Jan Reedijk, Dave R van Staveren, Anthony L. Spek, Thomas Weyhermüller

Publikováno v: Inorganica Chimica Acta. 315:163-171

The coordination chemistry of Ln(hfpd)3 (hfpd=1,1,1,5,5,5-hexafluoropentane-2,4-dionate) with phen and bpy depends on the size of the Ln3+ ion and on the used solvent. The complexes [Er(hfpd)3(phen)] (7) and [Er(hfpd)3(bpy)] (14) were obtained from t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eceb030a65950fc21910297fcac994c7
https://doi.org/10.1016/s0020-1693(01)00334-6

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