Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Bernd Kayser"'
Autor:
Bernd Kayser, Judith Baumgartner, Michael J. West, Yong Kwang Park, Bolin Zhu, Theodore P. Klupinski, Robert G. Bergman, K. Peter C. Vollhardt
Publikováno v:
Synthesis. 51:2409-2429
The fulvalene diiridium platform was scrutinized for its potential to effect double vicinal C–H activation of C6H6 and C6H12, respectively. For this purpose, an improved preparation of Fv[Ir(CO)2]2 was developed, and the syntheses of the new comple
Autor:
Andrey A. Yakovenko, Ognjen Š. Miljanić, Tatiana V. Timofeeva, Yong Yu, Bernd Kayser, Philip W. Leonard, Michael J. Eichberg, Glenn D. Whitener, K. Peter C. Vollhardt
Publikováno v:
Inorganica Chimica Acta. 369:32-39
Radial (tetracyclopentadienyl)cyclobutadiene pentametals have been synthesized by the Pd-catalyzed coupling of cyclopentadienyltin or of (CpM)zinc reagents with (tetraiodocyclobutadiene)iron(tricabonyl). X-ray structural and NMR data reveal that, whi
Autor:
Paul Butkerait, Wolfgang Beck, Kent E. Vrana, James A. Daunais, Michael D. Gershon, Yimei Xu, Janina Altman, Alan H. Stokes, Hadassah Tamir, Bernd Kayser
Publikováno v:
Journal of Neurochemistry. 74:2067-2073
Tryptophan hydroxylase (TPH) is the initial and rate-limiting enzyme in serotonin biosynthesis. The enzyme activity is dependent on molecular oxygen, a tetrahydropterin cosubstrate, and ferrous iron. The present study demonstrates that TPH is inhibit
Autor:
Bernd Kayser, Wolfgang Beck
Publikováno v:
Zeitschrift für Naturforschung B. 59:1423-1428
4-Iodo-L-phenylalanine gives with the chloro bridged compounds [(Et3P)PtCl2]2, [(Et3P)PdCl2]2 and [Cp*IrCl2]2 the N,O-chelate complexes (L)(Cl)M[NH2-C(H)(CH2C6H4I)CO2] (M = Pt, Pd, Ir; L = PEt3, Cp* ) (1 - 3). Oxidative addition of N-protected 4-iodo
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 214:231-239
Palladium-catalyzed CC and CN bond forming reactions of aryl halides continue to be a major focus in catalysis research for the fine chemical industry. Still there exists a significant need for the development of more active and productive pall
Publikováno v:
Organometallics. 19:2389-2392
(Fulvalene)hexacarbonyldirhenium (1) furnishes the first silylene fulvalenedimetal complex 3 by double Si−H activation. The solid-state structure of the molecule was determined by X-ray analysis and its solution dynamics by 1H NMR spectroscopy.
Publikováno v:
European Journal of Inorganic Chemistry. 1998:1791-1798
The palladium-mediated coupling of p-ethynylphenylalanine (p-epa) with different halogenated benzenes yielded alkyne-bridged α-amino acids. A series of cationic mono- to hexanuclear (Ph3P)2Pt complexes with the anions of p-ethynylphenylalanine and a
Publikováno v:
European Journal of Inorganic Chemistry. 1998:375-379
Oxidative addition of methyl N-benzoyl-2-bromoglycinate to bis(dibenzylideneacetone)palladium, in the presence of 2,2′-bipyridyl, and to (Ph3P)2Pt(η2-C2H4) gives the α-metallated glycine esters 1a and 2a. Abstraction of bromide from 1a, 2a, using
Publikováno v:
Chemische Berichte. 130:171-177
The reactions of protected α-bromoglycine esters R1(O)CNHCH(Br)CO2R2 (R1Ph, OCMe3; R2 Me, tBu) with organometallic anions of acetylferrocene, CpFe(CO)(PPh3)-C(O)CH3, (OC)5MC(OMe)CH3 (MCr, W), (OC)3Cr(η6-diphenylmethane), (OC)3Cr[η6-fluorene), (OC)
Publikováno v:
Tetrahedron. 53:2475-2484
The Heck reaction of trimethylsilylacetylene with N-t-Boc-4-iodo-L-phenylalanine methyl ester gives N-t-Boc-4-ethynyl-L-phenylalanine methyl ester (2). Coupling of 2 with different alkynes yields alkyne bridged linear amino acid esters 3– 5. Also t