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'Atropisomerism' in keywords
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1987 (1)
1982 (1)
1Author    Hans Moser, Grety Rihs, Hanspeter Sauter, Entwicklung Forschung, PflanzenschutzRequires cookie*
 Title    Der Einfluß yon Atropisomerie und chiralem Zentrum auf die biologische Aktivität des Metolachlor The Influence of Atropisomerism and Chiral Centre on the Biological Activity of Metolachlor  
 Abstract    The four stereoisomers of the grass herbicide Metolachlor, the isomerism of which is based on a combination of a chiral centre and a chiral axis, were prepared, and their absolute configurations determined by X-ray analysis. The synthesis was achieved by using optically active starting materials and new optically active carbamates as intermediates. The herbicidal activity is mainly influenced by the chiral centre, the S-isomers being the most active ones. 
  Reference    Z. Naturforsch. 37b, 451—462 (1982); eingegangen am 20. August 1981 
  Published    1982 
  Keywords    Chloro-acetanilide, Metolachlor, Atropisomerism, Chiral Centre, Biological Activity 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0451.pdf 
 Identifier    ZNB-1982-37b-0451 
 Volume    37 
2Author    Roland Köster, Günther Seidel, Susanna Kerschl, Bernd WrackmeyerRequires cookie*
 Title    Atropisomerism in Boron-Nitrogen Heterocycles  
 Abstract    Atropisomerism owing to hindered rotation about the N-aryl bond is observed in 4,5-diethyl-2,2,3-trimethyl-l-(o-trifluormethyl)phenyl-2,5-dihydro-lH-l,2,5-azasila-(2) and -azastanna-boroles (5). The compounds 2 and 5 are characterized by elemental analysis, mass spectra and 'H, "B, 13 C, 29 Si and U9 Sn NMR. The orr/zo-trifluoromethyl group serves as an additional NMR spectroscopic probe because of "through space" W F-'H and 19 F-L, C spin spin coupling. Compound 5 is the first derivative of a 2,5-dihydro-lH-l,2,5-azastannaborol. 
  Reference    Z. Naturforsch. 42b, 191—194 (1987); eingegangen am 23. Oktober 1986 
  Published    1987 
  Keywords    Atropisomerism, Boron-Nitrogen Heterocycles, Multinuclear NMR 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0191.pdf 
 Identifier    ZNB-1987-42b-0191 
 Volume    42