1,3-Dipolar cycloaddition reactions of imines of α-amino-acid esters: X-ray crystal and molecular structure of methyl 4-(2-furyl)-2,7-diphenyl-6,8-dioxo-3,7-diazabicyclo[3.3.0]octane-2-carboxylate

1978 ◽  
pp. 109-111 ◽  
Author(s):  
Ronald Grigg ◽  
James Kemp ◽  
George Sheldrick ◽  
Jill Trotter
Keyword(s):  
Molecular Structure ◽  
Amino Acid ◽  
Crystal And Molecular Structure ◽  
Dipolar Cycloaddition ◽  
Amino Acid Esters ◽  
Cycloaddition Reactions ◽  
X Ray ◽  
Acid Esters

Metallkomplexe mit biologisch wichtigen Liganden, CXV. Addition von α-Aminosäureestern an [CpFe(CO)3]+: Carbamoylkomplexe Cp(OC)2Fe-C(O)NHCHRCO2R’ und Kristallstruktur von Cp(OC)2Fe-C(O)NHCH2CO2Et / Metal Complexes of Biologically Important Ligands, CXV. Addition of α-Amino Acid Esters to [CpFe(CO)3]+: Carbamoyl Complexes Cp(OC)2Fe-C(O)NHCHRCO2R' and Crystal Structure of Cp(OC)2Fe-C(O)NHCH2CO2Et

1999 ◽  
Vol 54 (3) ◽  
pp. 385-388 ◽  
Author(s):  
Reinhold Urban ◽  
Kurt Polbom ◽  
Wolfgang Beck
Keyword(s):  
Crystal Structure ◽  
Amino Acid ◽  
Metal Complexes ◽  
Amino Acid Esters ◽  
X Ray Diffraction ◽  
Carbonyl Ligand ◽  
X Ray ◽  
Acid Esters

α-Amino acid esters can be added to a carbonyl ligand of [CpFe(CO)3]+CF3SO3- to give the carbamoyl complexes Cp(OC)2Fe-C(O)NHCHRCO2R′ (R = H, Me, CHMe2, CH2Ph; R′ = Et, Me). This type of reaction may be useful for the marking of peptides at the amino end. The crystal structure of Cp(OC)2Fe-C(O)NHCH2CO2Et was determined by X-ray diffraction.

Pyrrolidine ring formation by a new base-promoted 1,3-dipolar cycloaddition of N-(phenylthiomethyl) amino acid esters

1984 ◽  
Vol 25 (15) ◽  
pp. 1579-1582 ◽  
Author(s):  
Nobuyuki Imai ◽  
Yoshiyasu Terao ◽  
Kazuo Achiwa ◽  
Minoru Sekiya
Keyword(s):  
Amino Acid ◽  
Ring Formation ◽  
Dipolar Cycloaddition ◽  
Amino Acid Esters ◽  
Pyrrolidine Ring ◽  
Acid Esters

Metallkomplexe mit biologisch wichtigen Liganden, LXXXIV [1] Halbsandwich-Komplexe von Rhodium(III), Iridium(III), Cobalt(III), Ruthenium(II), Ruthenium(III) und Chrom(III) mit Aminosäureester-Liganden Metal Complexes with Biologically Important Ligands, LXXXIV [1] Half-Sandwich Complexes o f Rhodium(III), Iridium(III), Cobalt(III), Ruthenium(II), Ruthenium(III) and Chromium(III) with Amino Acid Ester Ligands

1996 ◽  
Vol 51 (2) ◽  
pp. 187-200 ◽  
Author(s):  
Ralph Bergs ◽  
Roland Krämer ◽  
Michael Maurus ◽  
Bernhard Schreiner ◽  
Reinhold Urban ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Ester ◽  
Amino Acid Esters ◽  
Ethoxy Group ◽  
Exchange Reactions ◽  
Chelate Complexes ◽  
X Ray ◽  
Ester Exchange ◽  
Half Sandwich ◽  
Acid Esters

Abstract A series of cyclopentadienyl and pentamethylcyclopentadienyl complexes of cobalt, rhodium, iridium, ruthenium and chromium with a-amino-acid esters (L) as ligands was prepared and characterized: Cp*(Cl)2M(L) (1, 2: M = Rh, Ir), Cp(I)2Co(L) (4), [Cp(Ph3P)2Ru(L)]+BF- (6), [Cp(OC)(Ph3P)Ru]+BF- (7) and the paramagnetic compounds Cp*(Cl)2Ru(L) (8) and Cp(Br)2Cr(L) (9). AlaOMe and HisOMe form N ,O and N,N chelate complexes [Cp*(Cl)M(alaOMe)]+BF-4 (3: M = Rh, Ir), [Cp(I)Co(hisOMe)]+BF4. Cp*Co(CO)I2 and GlyOMe gave the N,O-dipeptide ester complex Cp*(I)Co(glyglyOMe)]+BF-4 (5). The crystal structures of Cp(I)2Co(glyOEt) and Cp*(Cl)2Ru(alaOMe) were determined by X-ray diffrac­tion. The complexes 1 and 2 undergo ester exchange reactions with CD3OD. [Cp*MCl2]2 (M = Rh, Ir) catalyze the exchange of the ethoxy group in Me2NCH2CO2Et by CD3OD.

scholarly journals Crystal and Molecular Structure of a New Hydroxylamido/Amino Acid Oxovanadium(V) Complex, [VO(NH2O)2(DL-methioninato)]·H2O

2011 ◽  
Vol 66 (7) ◽  
pp. 752-754
Author(s):  
Oscar E. Piro ◽  
Gustavo A. Echeverría ◽  
Gabriel Arrambide ◽  
Dinorah Gambino ◽  
Enrique J. Baran
Keyword(s):  
Molecular Structure ◽  
Amino Acid ◽  
Binding Site ◽  
Crystal And Molecular Structure ◽  
Bidentate Ligand ◽  
The Other ◽  
X Ray Diffraction ◽  
Apical Position ◽  
X Ray

The crystal and molecular structure of the [VO(DLmeth)( NH2O)2]・H2O complex has been determined by X-ray diffraction methods (monoclinic, P21/c with a = 5.8138(2), b = 27.3496(8), c = 7.5663(2) A° , β = 103.059(3)◦, and Z = 4). The vanadium(V) cation is in a pentagonal bipyramidal environment axially coordinated to the oxo group and equatorially to two hydroxylamido groups in a side-on fashion. The fifth equatorial binding site and the other apical position are occupied by an N and an O atom, respectively, from the methioninate anion acting as a bidentate ligand.

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