Bond fixation in annulenes. 5. Absolute configuration and chiroptical properties of optically active 1,2,3-trimethyl- and 1,2,3,4-tetramethylcyclooctatetraenes

1979 ◽  
Vol 101 (6) ◽  
pp. 1615-1617 ◽  
Author(s):  
John M. Gardlik ◽  
Larry K. Johnson ◽  
Leo A. Paquette ◽  
Barbara A. Solheim ◽  
James P. Springer ◽  
...  
Keyword(s):  
Absolute Configuration ◽  
Optically Active ◽  
Chiroptical Properties

Transition metal mediated asymmetric synthesis. II. Complete resolution of (2R,5S)-(-)-Tricarbonyl[1-5-η-(2-methoxy-5-methylcyclohexadienyl)]iron(1+) hexafluorophosphate(1 -) by selective crystallization of enantiomers

1981 ◽  
Vol 34 (11) ◽  
pp. 2339 ◽  
Author(s):  
GR Stephenson
Keyword(s):  
Absolute Configuration ◽  
Complete Resolution ◽  
Optical Purity ◽  
Rotatory Power ◽  
Optically Active ◽  
Dimethyl Malonate ◽  
Chiroptical Properties ◽  
Selective Crystallization ◽  
Active Salt ◽  
Limiting Value

The resolution of tricarbonyl(1-5-η-cylcohexadienyl)iron(1+) salts can be achieved by selective crystallization of enantiomers. The magnitude of the specific rotatory power of the title salt (1) was increased to a limiting value which was shown to correspond to optical purity, by a direct, n.m.r. method, after alkylation with dimethyl malonate. Reduction of the optically active salt defined the absolute configuration of (2R,5S)-(+ )-tricarbonyl[l-4-η-(2-methoxy-5β-methylcyclohexa-1,3-diene)]-iron(0). The chiroptical properties of the products are discussed.

Absolute configuration determination of some optically active multifunctional carbon compounds

1988 ◽  
Vol 29 (37) ◽  
pp. 4727-4730 ◽  
Author(s):  
Yoshio Takeuchi ◽  
Michiyo Nojiri ◽  
Toru Koizumi ◽  
Yoichi Iitaka
Keyword(s):  
Absolute Configuration ◽  
Optically Active ◽  
Carbon Compounds
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