ChemInform Abstract: Thermolysis of Trifluoromethyl-Containing Vinyldiazocarbonyl Compounds and X-Ray Crystal Structure Analysis of Unexpected Reaction Products.

ChemInform ◽  
2014 ◽  
Vol 45 (15) ◽  
pp. no-no
Author(s):  
Valerij A. Nikolaev ◽  
Murat B. Supurgibekov ◽  
Ralf Haiges ◽  
Anthony Linden ◽  
G. K. Surya Prakash
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Reaction Products ◽  
X Ray ◽  
Unexpected Reaction

Thermolysis of trifluoromethyl-containing vinyldiazocarbonyl compounds and X-ray crystal structure analysis of unexpected reaction products

2013 ◽  
Vol 156 ◽  
pp. 322-326 ◽  
Author(s):  
Valerij A. Nikolaev ◽  
Murat B. Supurgibekov ◽  
Ralf Haiges ◽  
Anthony Linden ◽  
G.K. Surya Prakash
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Reaction Products ◽  
X Ray ◽  
Unexpected Reaction

scholarly journals Synthesis of tetrasubstituted pyrazoles containing pyridinyl substituents

2017 ◽  
Vol 13 ◽  
pp. 895-902 ◽  
Author(s):  
Josef Jansa ◽  
Ramona Schmidt ◽  
Ashenafi Damtew Mamuye ◽  
Laura Castoldi ◽  
Alexander Roller ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Condensation Product ◽  
Cross Coupling ◽  
Crystal Structure Analysis ◽  
Coupling Reactions ◽  
Reaction Products ◽  
Pd Catalysts ◽  
Cross Coupling Reactions ◽  
Unexpected Reaction

A synthesis of tetrasubstituted pyrazoles containing two, three or four pyridinyl substituents is described. Hence, the reaction of 1,3-dipyridinyl-1,3-propanediones with 2-hydrazinopyridine or phenylhydrazine, respectively, affords the corresponding 1,3,5-trisubstituted pyrazoles. Iodination at the 4-position of the pyrazole nucleus by treatment with I2/HIO3 gives the appropriate 4-iodopyrazoles which served as starting materials for different cross-coupling reactions. Finally, Negishi cross-coupling employing organozinc halides and Pd catalysts turned out to be the method of choice to obtain the desired tetrasubstituted pyrazoles. The formation of different unexpected reaction products is described. Detailed NMR spectroscopic investigations (1H, 13C, 15N) were undertaken with all products prepared. Moreover, the structure of a condensation product was confirmed by crystal structure analysis.

scholarly journals Preparative-scale HPLC Resolution of Metallacyclic η3-Allyltricarbonyliron Complexes and Determination of the Absolute Configuration by X-Ray Crystal Structure Analysis

1999 ◽  
Vol 23 (9) ◽  
pp. 578-579
Author(s):  
Rainer Schobert ◽  
Hermann Pfab ◽  
Jutta Böhmer ◽  
Frank Hampel ◽  
Andreas Werner
Keyword(s):  
Crystal Structure ◽  
Silica Gel ◽  
Structure Analysis ◽  
Absolute Configuration ◽  
Crystal Structure Analysis ◽  
Preparative Scale ◽  
X Ray ◽  
The Absolute

Racemates of (η3-allyl)tricarbonyliron lactone complex Fe(CO)3{η1:η3-C(O)XCH2CHCMeCH2} 1a (X = O) and (η3-allyl)tricarbonyliron lactam complex 2a (X = NMe) are resolved on a preparative scale by HPLC on cellulose tris(3,5-dimethylphenyl)carbamate/silica gel RP-8 and the absolute configuration of (-)-2a is determined by X-ray crystal structure analysis.

Second-Generation Inhibitors for the Metalloprotease Neprilysin Based on Bicyclic Heteroaromatic Scaffolds: Synthesis, Biological Activity, and X-Ray Crystal-Structure Analysis

2005 ◽  
Vol 88 (4) ◽  
pp. 731-750 ◽  
Author(s):  
Stefan Sahli ◽  
Brian Frank ◽  
W. Bernd Schweizer ◽  
François Diederich ◽  
Denise Blum-Kaelin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Biological Activity ◽  
Structure Analysis ◽  
Second Generation ◽  
Crystal Structure Analysis ◽  
X Ray
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