Preparation of optically active amines by a combination of Gabriel synthesis and optical resolution. X-Ray crystal structure of the adduct between (–)-10,10′-dihydroxy-9,9′-biphenanthryl and N-(1-tert-butyl-2-oxoazetidin-3-yl)phthalimide

1993 ◽  
pp. 2357-2361 ◽  
Author(s):  
Fumio Toda ◽  
Shinichi Soda ◽  
Israel Goldberg
Keyword(s):  
Crystal Structure ◽  
Optical Resolution ◽  
Optically Active ◽  
X Ray ◽  
Tert Butyl

Laser Raman and infrared spectra, and x-ray crystal structure of trans-di-tert-butyl hyponitrite

1982 ◽  
Vol 104 (19) ◽  
pp. 5114-5119 ◽  
Author(s):  
Craig A. Ogle ◽  
Karen A. Van der Kooi ◽  
G. David Mendenhall ◽  
Veerayooth Lorprayoon ◽  
Bahne C. Cornilsen
Keyword(s):  
Crystal Structure ◽  
Infrared Spectra ◽  
X Ray ◽  
Tert Butyl ◽  
Laser Raman

Synthese neuer optisch aktiver Rh-Komplexe: Die Kristallstruktur von [(5S)-3,4-Bis(diphenylphosphino)-5-menthoxy-2(5H)-furanon](1,5-cyclooctadien)rhodium-hexafluorophosphat / Synthesis of New Optically Active Rh-Complexes: The Crystal Structure of [(5S)-3,4-Bis(diphenylphosphino)-5-menthoxy-2(5 H)-furanone](1,5-cyclooctadiene)rhodium-hexafluorophosphate

1989 ◽  
Vol 44 (8) ◽  
pp. 884-888 ◽  
Author(s):  
Dieter Fenske ◽  
Kurt Merzweiler
Keyword(s):  
Crystal Structure ◽  
Methyl Ester ◽  
Single Crystal ◽  
Enantiomeric Excess ◽  
Optically Active ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants

The chiral diphosphine 1 reacts with [(diolefin)Rh(THF)2]PF6 (diolefine: 1.5-cyclooctadiene, norbornadiene) to form the complexes 4 and 5. The structure of 4 was determined by single crystal X-ray analysis. 4 crystallizes in the monoclinic space group P21. The lattice constants (at 180 K) are: a = 974.0(6); b = 3889.2(29); c = 1309.4(5) pm; β = 105.25(4)°. The hydrogenation of methyl-α-acetamidocinnamate in the presence of 5 yields (R)-N-acetylphenylalanine methyl ester with 33% enantiomeric excess.

scholarly journals Azo-linked corner porphyrin systems: synthesis, crystal structures and spectroscopic investigation

2010 ◽  
Vol 14 (06) ◽  
pp. 481-493 ◽  
Author(s):  
Bruno Bašić ◽  
John C. McMurtrie ◽  
Dennis P. Arnold
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Spectroscopic Investigation ◽  
The Other ◽  
X Ray ◽  
Tert Butyl ◽  
Dinitro Derivative

1,2-bis[10,15-di(3,5-di-tert-butyl)phenylporphyrinatonickel(II)-5-yl]diazene was synthesised via copper-catalyzed coupling of aminated nickel(II) 5,10-diarylporphyrin ("corner porphyrin") and its X-ray crystal structure was determined. Two different crystals yielded different structures, one with the free meso-positions in a trans-like orientation, and the other with a cis-like disposition. The free meso-positions of the obtained dimer have been further functionalized while the synthesis of a zinc analog has so far been unsuccessful. The X-ray crystal structure of the dinitro derivative of the dinickel(II) azoporphyrin was determined, and the structure showed a cis-like disposition of the nitro groups.

Synthesis and Properties of Optically Active Coronands Incorporating Sulfoxide and Sulfoximine Functionality

1987 ◽  
Vol 40 (1) ◽  
pp. 61 ◽  
Author(s):  
TW Hambley ◽  
TW Hambley ◽  
B Raguse ◽  
B Raguse ◽  
DD Ridley ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Alkali Metal ◽  
Association Constants ◽  
Optically Active ◽  
X Ray ◽  
Sodium Cations

A number of optically active coronands incorporating sulfoxide and sulfoximine functionality have been prepared and their association constants for complexes with alkali metal and ammonium picrates have been measured. Some of these complexes have association constants greater than 70000 1. mol-1 with selectivity for lithium and sodium cations, but no stereoselectivity has been observed for complexes with racemic ammonium guests. The X-ray crystal structure of one of the sulfoxide coronands is reported.

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