Preparative Separation of Tripdiolide from Chinese Traditional Herb by Multidimensional CCC

2005 ◽  
Vol 28 (12-13) ◽  
pp. 1903-1911 ◽  
Author(s):  
Jun Wei ◽  
Tianyou Zhang ◽  
Yoichiro Ito
Keyword(s):  
Preparative Separation ◽  
Chinese Traditional Herb

Sterically Crowded Heterocycles. VI. Relative Configuration of Diastereoisomeric (Z)-1,3-Diphenyl-3-(5-methyl-2-phenylimidazo[1,2-a]pyridin-3-yl)prop-2-en-1-ols

1996 ◽  
Vol 61 (9) ◽  
pp. 1380-1385 ◽  
Author(s):  
Jan Čejka ◽  
Richard Kubík ◽  
Bohumil Kratochvíl ◽  
Josef Kuthan
Keyword(s):  
Preparative Separation ◽  
Orthorhombic Space Group ◽  
Relative Configuration ◽  
Space Group ◽  
X Ray

Relative configuration of the titled racemic compounds 1a and 1b has been elucidated on the basis of a complete X-ray structure determined for the higher melting diastereoisomer. The compound 1a crystallizes in the orthorhombic space group P21212, a = 15.610(3) Å, b = 18.634(4) Å, c = 7.5672(7) Å, V = 2201.1(6) Å3, Z = 4. Preparative separation of both diastereoisomers is reported.

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