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1Author    Requires cookie*
 Abstract    The reaction of imines with various electrophiles have afforded only N-alkylated products, contrary to earlier reports. While a large amount of work has been done on the synthetic applications of tertiary enamines, pioneered by S t o r k and coworkers1*2, less is known about the scope of similar applicability of secondary enamines. Secondary enamines predo­ minantly exist in the imino form both in aliphatic and in cyclic compounds except in cases where the R. R I tertiary enamine secondary enamine 
  Reference    (Z. Naturforsch. 30b, 128—131 [1975]; received September 13 1974) 
  Published    1975 
  Keywords    Imines, Enamines, Alkylation, Tautomerism 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0128.pdf 
 Identifier    ZNB-1975-30b-0128 
 Volume    30 
2Author    Norbert Kuhn3, Riad Fawzi3, M. Anfred Steimann3, Jörg Wiethoff3, D. Ieter Bläserb, Roland BoesebRequires cookie*
 Title    Synthese und Struktur von 2-Imino-l,3-dimethylimidazolin [1] Synthesis and Structure of 2-Imino-l,3-dimethylimidazoline [1]  
 Abstract    Deprotonation of the 2-amino-1,3-dimethylimidazolium salt 5 (obtained through methyla-tion of 2-am ino-l-m ethylim idazole (4)) by KH gives 2-im ino-l,3-dim ethylim idazoline 6. The trimethylsilylimino compound 14 is formed on the reaction of 6 with chlorotrimethylsilane in the ratio 2:1. Further reaction with chlorotrimethylsilane gives the silylated aminoimidazo-lium salt 15. The X-ray structures o f 5 and 6 are reported. 
  Reference    Z. Naturforsch. 50b, 1779—1784 (1995); eingegangen am 23. Mai 1995 
  Published    1995 
  Keywords    Imidazole, Imine, X-Ray 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1779.pdf 
 Identifier    ZNB-1995-50b-1779 
 Volume    50 
3Author    ChlorotrimethylsilaneJan Schneider3, Eckhard Popowski, Hans FuhrmannbRequires cookie*
 Title    Reaktionen von Lithiumhydridosilylamiden mit Carbonylverbindungen und Gemischen von Carbonylverbindungen und Chlortrimethylsilan Reactions of Lithium Hydridosilylamides with Carbonyl Compounds and Mixtures of Carbonyl Compounds  
 Abstract    The lithium hydridosilylamides Me2(H)SiN(Li)R (1: R = CM e3, 2: R = SiMe3) were allowed to react either with the non-enolizable carbonyl compounds CH2=C(Me)CHO, PhCHO and Ph2CO followed by trapping with chlorotrimethylsilane (A), or with mixtures of these carbonyl compounds and chlorotrimethylsilane (B). In the second case the course of the reactions is determined by the carbonyl compound. The composition of the reaction mixtures is nearly the same according to A and B. Main products in the reactions with the aldehydes are the corresponding imines R'CH=NR (R' = CH2=C(Me), Ph) 3 , 4 , 8 ,9 formed by addition of the hydridosilylamides to the C = 0 group of the aldehydes and subsequent LiOSiM e2H elimination. Partial hydrosilylation of the alde­ hydes by the hydridosilanolate followed by the trimethylsilylation yields the alkoxydisiloxanes R'CH2OSiMe2OSiMe3 6 , 11. In some cases 2 partially reacts under hydrosilylation to give the alkoxydisilazanes R'CH2OSiM e2NHSiM e3 7,12. The hydrosilylation is the preferred reaction of 1 and 2 with benzophenone. The compounds Ph2CHOSiMe2NHR 13, 14 are obtained. This difference in the reaction behaviour of 1 and 2 towards the aldehydes and benzophenone is mainly due to steric reasons. Depending on the conditions the imines Ph2C=NR 20, 21 may be formed. Ph2CHOSiM e2OSiMe3 (22) is a secondary product of imine formation. In all reactions of 1 and 2 with the carbonyl compounds the corresponding alkoxysilanes R'CH2OSiMe3 (5: R' = CH 2=C(Me), 6 : R' = Ph) and Ph2CHOSiM e3 (15) are generated. Compounds resulting from a reaction of 1 and 2 with chlorotrimethylsilane are produced to minor extent, but only if the molar ratio of amide to carbonyl compounds is not greater than one. The formation of a silanimine intermediate in reaction according to B is not observed. 
  Reference    Z. Naturforsch. 53b, 663—672 (1998); eingegangen am 9. April 1998 
  Published    1998 
  Keywords    Hydridosilylamides, Reaction Behaviour, Imines, Hydrosilylation 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0663.pdf 
 Identifier    ZNB-1998-53b-0663 
 Volume    53 
4Author    Lothar Weber, Eckhard Dobbert, Andreas Rausch, Hans-Georg Stammler, Beate NeumannRequires cookie*
 Title    Synthesis, Structure and Reactivity of 2-Amino-and 2-Imino-2,3-dihydro-1H -1,3,2-diazaboroles  
 Abstract    The 2-halo-2,3-dihydro-1H-1,3,2-diazaboroles RN-CH=CH-N(R)BX (la': R = rBu, X = Br; lb: R = 2,6-Me2C6H.v, X = I) were converted into the 2-amino-2,3-dihydro-\H -1,3,2-diazaboroles RN-CH=CH-N(R)B-NH2 (2a: R = /Bu; 2b: 2,6-Me2C6H3) by treatment with dry gaseous ammonia. Similarly reaction of la' with 2,6-dimethylaniline or /BuNHt afforded the corresponding derivates /BuN-CH=CH-N(rBu)BNHR' (3; R 1 = 2,6-Me2C6H3; 4; R1 = rBu). The treatment of la' with the ethylene diamine adduct of lithium acetylide led to the formation of [rBuN-CH=CH-N(/Bu)BN(H)CH2]2 (5). Lithiation of 2 a and subsequent silylation gave 6 (R1 = SiMe3), which was transformed to the diborolylamine [/BuN-CH=CH-N(rBu)B]2NH (7) upon exposure to la'. Borolylketimine /BuN-CH=CH-N(/Bu)B-N=CPh2 (8) and borolylcar-bodiimide fBuN-CH=CHN(/Bu)B-N=C=N-SiMe3 (9) resulted from la' and Ph2C=NSiMe3 or Me3SiN=C=NSiMe3, respectively. All the new compounds were characterized by elemental analyses as well as spectroscopic data (IR, 'H, n B, i3C NMR, MS). Heterocycle 5 was also subjected to an X-ray diffraction analysis. 
  Reference    Z. Naturforsch. 54b, 363—371 (1999); eingegangen am 25. September 1998 
  Published    1999 
  Keywords    Boron, Diazaboroles, Amines, Imines 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0363.pdf 
 Identifier    ZNB-1999-54b-0363 
 Volume    54 
5Author    Masaru Ishida, Shinzi Kato, Masateru MizutaRequires cookie*
 Title    The Reaction of Dithiocarboxylic Acids with Imines  
 Abstract    Aromatic dithiocarboxylic acids 1 react with imines 4 to give the corresponding adducts 5, aminomethyl dithiocarboxylates, in good yields. The adducts 5 react with phenacyl bromide to give the corresponding phenacyl dithiocarboxy-lates 6. We have previously reported that the reaction of dithiocarboxylic acids (1) with various kinds of secondary and tertiary amines gave the correspond-ing salts (2) in excellent yields [1]. Recently, 
  Reference    Z. Naturforsch. 36b, 1047—1049 (1981); received April 29 1981 
  Published    1981 
  Keywords    Aryl Dithiocarboxylic Acids, Imines, Aminomethyl Dithiocarboxylates, Phenacyl Dithiocarboxylates 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1047_n.pdf 
 Identifier    ZNB-1981-36b-1047_n 
 Volume    36 
6Author    Heinz Hoberg, Klaus SümmermannRequires cookie*
 Title    Nickel(0)-katalysierte Synthese von Iminen aus Isocyanaten und Aldehyden Nickel(O) Catalysed Synthesis of Imines from Isocyanates and Aldehydes  
 Abstract    The influence of different ligands upon the nickel(0)-catalysed formation of imines from iso­ cyanates and aldehydes is reported. Carbonyl-free nickel(O) systems are found to be more active and provide a simple synthesis of imines. The catalysis proceeds via a five-membered metalla-cycle, which has been isolated and characterized. 
  Reference    Z. Naturforsch. 39b, 1032—1036 (1984); eingegangen am 2. März 1984 
  Published    1984 
  Keywords    Nickel(O), Isocyanates, Aldehydes, Imines, Reductive Elimination Process 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1032.pdf 
 Identifier    ZNB-1984-39b-1032 
 Volume    39 
7Author    Hubert Martin, R. Udolf, HerrmannRequires cookie*
 Title    Oxidation of Imines by Selenium Dioxide  
 Abstract    The oxidation of imines containing a a-methylene group by selenium dioxide is investigated. The products are shown to be a-imino carbonyl compounds by spectroscopic methods. The reactivity of various imines is discussed. 
  Reference    Z. Naturforsch. 41b, 1260—1264 (1986); received May 25 1986 
  Published    1986 
  Keywords    Selenium Dioxide, Imines, a-Imino Carbonyl Compounds 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-1260.pdf 
 Identifier    ZNB-1986-41b-1260 
 Volume    41 
8Author    Norbert Kuhn, Martin Grathwohl3, Manfred Steimann3, Gerald Henkelb, HerrnRequires cookie*
 Title    .2-Bis( 1' ,31 -dimethy limidazolin-21 -iminato)ethan - ein neuer Chelatligand [1]  
 Abstract    The reaction of 2-imino-l,3-dimethylimidazoline (10, ImNH) with X-CH2CH2-X (11, X = p-CH3C6 H4 S 0 3) gives the diimine adduct ImN-CH2CH2-NIm • 2 HX (12) from which the diimine ImN-CH2CH2-NIm (13) is obtained on treatment with KH. 13 reacts with (C6H5CN)2PdCl2 (15) to give the chelate complex (ImN-CH2CH2-NIm)PdCl2 (16). The X-ray structures of 12 and 16 are reported. 
  Reference    Z. Naturforsch. 53b, 997—1003 (1998); eingegangen am 2. Juni 1998 
  Published    1998 
  Keywords    Imines, Palladium, Chelates, Ligand Effects, X-Ray Data 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0997.pdf 
 Identifier    ZNB-1998-53b-0997 
 Volume    53