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1Author    Max Herberhold, Silke Gerstmann, Bernd WrackmeyerRequires cookie*
 Title    Ethylboration of Stannyl-Substituted Sulfur Diimides  
 Abstract    Bis(sulfurdiimido)tin compounds of the type R2Sn[(NSN)'Bu]2 [R = Me (2a), Et (2b)] re­ act with triethylborane Et^B by rearrangement and N-ethylation to give the novel amino-borane derivatives R2Sn[N('Bu)SN(Et)BEt2]2 (5a, b), in the same way as "Bu3Sn(NSN)'Bu (1) reacts with Et.^B to give "Bu3Sn[N('Bu)SN(Et)BEt2] (4). In contrast, 2c (R = 'Bu) and tris(sulfurdiimido)tin compounds RSn[(NSN)'Bu]3 [R = Me (3a), "Bu (3d)] react with Et3B mainly by Sn-and S-ethylation, accompanied by extensive decomposition. 'H, "B , 13C, 15N and 119Sn NMR spectroscopy served for the structural assignment in solution. 
  Reference    Z. Naturforsch. 56b, 342—346 (2001); received August 15 2000 
  Published    2001 
  Keywords    Aminoboranes, Organoboration, Sulfur Diimides 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0342.pdf 
 Identifier    ZNB-2001-56b-0342 
 Volume    56 
2Author    Christoph Bihlmayer, Susanna Kerschl, Bernd WrackmeyerRequires cookie*
 Title    Organoborierung von Alkinylstannanen, XX [1] Oligomerisation von 1-Propinyltrimethylstannan Organoboration of Alkynylstannanes, XX [1] Oligomerisation of 1-Propynyltrimethylstannane  
 Abstract    1-Propynylstannane (1) reacts with B-ethyl-9-borabicyclo[3.3.1]nonane (10) (ratio 2:1) to giva a new butadiene derivative (11). Attempts to oligomerize 1 by organoboration with trimethyl-borane (13) (ratio 2:1) lead to a hexatriene derivative (14). A larger excess of 1 (5:1) gives a mixture of higher oligomers, analogous to 14. The proposed structures of the new compounds 11, 14 are supported by "B, 13 C and 119 Sn NMR and mass spectra. 
  Reference    Z. Naturforsch. 42b, 715—719 (1987); eingegangen am 17. Dezember 1986/20. Januar 1987 
  Published    1987 
  Keywords    Alkynylstannanes, Organoboration, u9 Sn NMR Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0715.pdf 
 Identifier    ZNB-1987-42b-0715 
 Volume    42 
3Author    Peter Paetzold, Günther SchimmelRequires cookie*
 Title    ungesättigter Stickstoffbasen Boration Reactions with the N-Oxides and m-Imines of Unsaturated Nitrogen Bases  
 Abstract    -Dipolar reagents with an unsaturated CNO-or CNN-skeleton undergo 1,3-organo-boration by triorganoboranes. On the other hand, the unsaturated NNO-skeletons in azoxybenzene or nitrous-oxide are reduced to the corresponding NN-fragment by trialkyl-boranes. The 1,3-addition of aminoborane Cl2BNMe2 to the aldimineoxide PhHC = NMe-0 represents one of the rare examples of analogous reactivity of BN-and CC-double bonds. O-Borylhydroxylamines PhHCR-NMe-OBR2 are reduced by BR'3 to PhHCR-NMe-BR'2 and R'0-BR2. Similar reduction products are isolated from liquid-phase thermolysis of PhHCEt-NMe-OBEt2 (16), whereas gas-phase thermolysis of 16 gives PhCH = NMe, (EtBO)3, and C4HI0. 
  Reference    Z. Naturforsch. 35b, 568—577 (1980); eingegangen am 6. Dezember 1979 
  Published    1980 
  Keywords    O-Borylhydroxylamines, Borylhydrazines, 2-Borylhydrazones, Organoboration, Aminoboration 1, 3 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0568.pdf 
 Identifier    ZNB-1980-35b-0568 
 Volume    35 
4Author    Susanna Kerschl, Bernd WrackmeyerRequires cookie*
 Title    Organoborierung von Alkinylstannanen, XIV [1]  
 Abstract    Organoborierung von Bis(alkinyl)stannanen: Mechanismus und Anwendung der 119Sn—NMR-Spektroskopie O rganoboration of Alkynylstannanes, XIV [1] O rganoboration of Bis(alkynyl)stannanes: M echanism and Application of 119Sn NM R Spectroscopy Dimethylbis(phenylethynyl)stannane (1) reacts with trialkylboranes, BR3 (2), to give bis(al-kenyl stannanes (5) (R = C2H5), l-bora-4-stanna-2,5-cyclohexadienes (6) (R = C2H5, C3H7'), 1-stanna-2,4-cyclopentadienes (7) (R = C2H5) and l-stanna-3-cyclopentenes (8) (R = CH3, C2H5). I3C and uySn NMR data prove the structure of the reaction products (5 to 8). 119Sn NMR is useful (i) for following the course of the reaction (mechanism!) and (ii) for quantitative analysis of the product distribution. Deorganoboration reactions play an important role in the formation of the various heterocyclic systems. 
  Reference    Z. Naturforsch. 39b, 1037—1041 (1984); eingegangen am 24. Februar 1984 
  Published    1984 
  Keywords    et Alkynylstannanes, Organoboration, Mechanism, 1, ySn NMR Spectra, 13C NMR Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1037.pdf 
 Identifier    ZNB-1984-39b-1037 
 Volume    39