Go toArchive
Browse byFacets
Bookbag ( 0 )
'Amino Acid Ethyl Esters' in keywords
Results  1 Item
Sorted by   
Publication Year
1998 (1)
1Author    Frank Leßmann3, Lothar Beyer3, Rainer Richter3, Reinhard MeusingerbRequires cookie*
 Title    N-Benzoylthiocarbamoyl Amino Acid Ethyl Esters as Chelate Ligands for Transition Metal Ions  
 Abstract    The reactions of benzoyl isothiocyanate with amino acid ethyl esters (N-butyl glycine ethyl ester, (S)-(-)-proline ethyl ester) give N-benzoylthiocarbamoyl amino acid ethyl esters. Apart from the expected N-benzoylthiocarbamoyl (S)-(-)-proline ethyl ester the racemic N-benzoyl­ thiocarbamoyl (/?)/(S)-proline ethyl ester is formed because of base catalyzed racemization of the educt (5')-(-)-proline ethyl ester during the reaction of (S)-(-)-proline ethyl ester hy­ drochloride with triethylamine. The structures of both compounds were established by X-ray crystal structure analysis and specific optical rotation measurements. The ligands yield neutral 2:1 chelates with Ni , Cu11, Pd11 and Pt11. The carboxylic oxygen atoms are not involved in the chelation. The ligands and the resultant complexes show configurational E/Z isomerism. In the case of the chelates of the racemic N-benzoylthiocarbamoyl (/?)/(5)-proline ethyl ester, additional R/S isomerism is observed as shown by 
  Reference    Z. Naturforsch. 53b, 981—990 (1998); received November 11 1997 
  Published    1998 
  Keywords    Thioureas, Amino Acid Ethyl Esters, Chelates, NMR Data, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0981.pdf 
 Identifier    ZNB-1998-53b-0981 
 Volume    53