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2001 (1)
1984 (1)
1983 (1)
1Author    Gabriele Wagner3, Rudolf Herrmann3, Bj0m Pedersenb, Wolfgang Schererb, PaulJ. ScheuerRequires cookie*
 Title    Synthesis and Structure of Chiral Silatranes Derived from Terpenes  
 Abstract    Starting with the chiral pool compounds (—)-menthone, (—)-limonene, (—)-/3-pinene, and (—)-carvone, new homochiral triethanolamine derivatives were obtained and converted to chi­ ral silatranes. These silatranes were characterized by crystal structure analyses and NMR techniques. Conformational analyses in the solid terpene residues determine the direction of the ring 
  Reference    (Z. Naturforsch. 56b, 25—38 [2001]; received August 8 2000) 
  Published    2001 
  Keywords    Silatranes, Terpenes, Chiral Pool 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0025.pdf 
 Identifier    ZNB-2001-56b-0025 
 Volume    56 
2Author    Joseph Grobe, G. Erald, H. Enkel, B. Ernt Krebs, Nikolaos VoulgarakisRequires cookie*
 Title    Atran-analoge Verbindungen des Typs Me(R)SiSiMe (OCH2CH2)2N I I (I) o  
 Abstract    c h 2 Atrane Analogous C om pounds of the Type M e(R)SiSiM e (OCH->CH2)?N I 1 (1) Heterocyclic cage compounds of type I (compounds 8—10) have been prepared by condensa­ tion reactions of 1,2,2-trifunctional disilanes M e(R)XSiSiM eX2 (R = Me, Ph, OEt; X = NMe2, OEt) with triethanolamine using the "Dilution Principle". The starting compounds are obtained by Si—Me cleavage of Si2Me6 with acetylchloride/AlCl3 followed by either aminolysis with HNMe2 or alcoholysis with EtOH. 'H NMR spectra indicate N—*Si(l) intraction with the more acidic Si 
  Reference    Z. Naturforsch. 39b, 341—351 (1984); eingegangen am 30. August/26. Oktober 1983 
  Published    1984 
  Keywords    Silatranes, Transanular N — * Si-Interactions, NMR Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0341.pdf 
 Identifier    ZNB-1984-39b-0341 
 Volume    39 
3Author    V. Iktor, P. B. Aryshok, D. Evard, I. Stom, D. Ietrich, W. Erner, M. Ichail, G. V. OronkovRequires cookie*
 Title    Wirkung von Silatranen auf Wachstum, Sauerstoffentwicklung und Dunkelatmung von Cyclotella cryptica (Diatomeae)  
 Abstract    T he Effect o f S ilatranes on G row th, P hotosynthetic O xygen E volution an d D ark R espiration o f Cyclotella cryptica (D iatom eae) R ichard R oth The effect o f 5 silatranes RSi (OCH 2 CH2)3N , where R = C 2 H 50 ; C6H 5; C1CH2 and R Si[O C H (C H 3)C H 2 ]3N , where R = C6H5, C1CH2 and tetraethoxysilane were studied on the growth, photosynthetic oxygen evolution and dark respiration o f the marine centric diatom C yclotella cryptica. Both silica-free and Si(O H) 4 supplem ented m edia were used. Only 1-ethoxy-silatrane was hydrolyzed by the diatom , giving sufficient quantities o f Si(O H) 4 to m aintain growth without exogenous Si(O H)4. In this case the diatom s m ultiplied by a factor o f 18 within 48 h. W ith silica in the m edium , 1-phenylsilatrane, 1 -phenyl-3,7,10-trim ethylsilatrane, 1 -chlormethylsilatrane and 1-chlorm ethyl-3,7 ,10-trimethylsilatrane exhibited only slightly inhibitory activity. In contrast, however, tetraethoxysilane (5 • 10-4 mol/1) inhibited growth almost com pletely. Respiration was unaffected by all the silatranes tested, but net photosynthetic oxygen evolution was reduced by approx. 50% by 1-chlorm ethylsilatrane and 1-chlormethyl-3,7,10-trimethylsilatrane and almost com pletely by 1-phenylsilatrane and 1 -phenyl-3,7,10-tri-methylsilatrane. In the absence o f silica as nutrient in the m edium , the silatranes hardly affected dark respiration within 24 h. Conversely, the same samples showed no photosynthetic oxygen evolution after 24 h, and 24 h later again a negative 0 2 balance was produced in the light. Different silatranes produced significant differences in the final oxygen balance. 
  Reference    Z. Naturforsch. 38c, 39 (1983); received September 3 1982 
  Published    1983 
  Keywords    Cyclotella cryptica, Silatranes, Inhibition o f Photosynthesis, Inhibition o f Dark Respiration 
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 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0039.pdf 
 Identifier    ZNC-1983-38c-0039 
 Volume    38