Asymmetric nitrogen. 57. Investigation of the stereochemistry of aziridinecarboxylic acid derivatives by NMR

1988 ◽  
Vol 37 (5) ◽  
pp. 972-982 ◽  
Author(s):  
I. I. Chervin ◽  
A. A. Fomichev ◽  
A. S. Moskalenko ◽  
N. L. Zaichenko ◽  
A. �. Aliev ◽  
...  
Keyword(s):  
Asymmetric Nitrogen

Asymmetric nitrogen−35

Tetrahedron ◽  
1984 ◽  
Vol 40 (11) ◽  
pp. 2151-2159 ◽  
Author(s):  
G.V. Shustov ◽  
A.B. Zolotoi ◽  
N.L. Zaichenko ◽  
O.A. Dyachenko ◽  
L.O. Atovmyan ◽  
...  
Keyword(s):  
Asymmetric Nitrogen

ChemInform Abstract: ASYMMETRIC NITROGEN. 34. STEREOSELECTIVITY OF METHYLENATION REACTIONS OF ACTIVATED O-ALKYLOXIMES

1984 ◽  
Vol 15 (46) ◽  
Author(s):  
A. V. PROSYANIK ◽  
A. I. MISHCHENKO ◽  
N. L. ZAICHENKO ◽  
G. V. SHUSTOV ◽  
P. N. BELOV ◽  
...  
Keyword(s):  
Asymmetric Nitrogen

ChemInform Abstract: Asymmetric Nitrogen. Part 51. Synthesis and Optical Activation of 1,6-Diazabicyclo(3.1.0)hexane-5-carboxylic Acid and Its Derivatives.

ChemInform ◽  
1987 ◽  
Vol 18 (15) ◽  
Author(s):  
G. V. SHUSTOV ◽  
S. N. DENISENKO ◽  
A. B. ZOLOTOI ◽  
O. A. D'YACHENKO ◽  
L. O. ATOVMYAN ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Asymmetric Nitrogen ◽  
Optical Activation

New Macrocyclic Complexes Derived From Cobalt(III) Cage Complexes

1994 ◽  
Vol 47 (3) ◽  
pp. 529 ◽  
Author(s):  
II Creaser ◽  
T Komorita ◽  
AM Sargeson ◽  
AC Willis ◽  
K Yamanari
Keyword(s):  
Aqueous Solution ◽  
Strain Energy ◽  
Macrocyclic Ligand ◽  
Zinc Powder ◽  
Crystallographic Analysis ◽  
X Ray ◽  
Alkyl Complexes ◽  
Nitrogen Donor ◽  
Asymmetric Nitrogen

The synthesis and partial characterization of several green complexes, derived from the products of the reactions between [Co(Cl2-sar)]3+ (Cl2-sar = 1,8-dichloro-3,6,10,13,16,19- hexaazabicyclo [6.6.6] icosane ) and zinc powder in water, are described. Most of the complexes appear to have [CoCl2(N4)] chromophores , where N4 denotes the tetraaza macrocyclic ligand , 6,13-dimethylene-1,4,8,11-tetraazacyclotetradecane (L1). For trans-[CoCl2(L1)]+, three isomers due to different configurations about the asymmetric nitrogen donor centres were obtained and characterized by the electronic absorption and 13C n.m.r. spectra. Their stereochemistry is discussed and compared with that of 1,4,8,11-tetraazacyclotetradecane on the basis of strain energy minimized calculations. A trans-[CoCl2(H2L2)]3+ complex containing a related macrocycle with a pendant ethane-1,2-diamine arm [H2L2+, 6-(4-ammonio-2-azoniabutyl)-13-methylene-1,4,8,11-tetraazacyclotetradecane] was also isolated and characterized by X-ray crystallographic analysis. All these molecules are derived from the decomposition of zinc alkyl complexes formed by oxidative addition of zinc to the parent [CoII(Cl2-sar)]2+ ion in aqueous solution.

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