76268-57-0Relevant academic research and scientific papers
Cation-induced structural variations in the alkali metal derivatives of 2-trimethylsilylaminopyridine: Synthesis and X-ray structures of complexes for all five metals Li-Cs with 12-crown-4
Liddle, Stephen T.,Clegg, William
, p. 402 - 408 (2001)
The secondary amine 2-trimethylsilylaminopyridine [PyN(H)SiMe3] 1 was synthesised by mono-lithiation of 2-aminopyridine and subsequent reaction with Me3SiCl. The compound is readily metallated by BunLi in ethereal solvent, in the presence of the macrocyclic polyether 12-crown-4 (12C4), to afford the lithium secondary amide complex [Li(PyNSiMe 3)(12C4)] 2, in which the amide ligand binds through both the amido and pyridyl nitrogen centres. Metathesis of 2 with ButO Na yields the unusual 'ate' solvent-separated ion pair complex [Na(12C4)2]- [Na(PyNSiMe3)2(THF)]·(THF) 3. Metathesis of 2 with ROM [R = But, M = K; R = CH3CH2CH 2CH2C(CH2-CH3)HCH2, M = Rb] yields the two bridged dimers [{K(PyNSiMe3)(12C4)} 2]·2PhMe 4 and [{Rb(PyNSiMe3)-(12C4)}2] 5. In both 4 and 5 the amido and pyridyl nitrogens bridge between metal centres. Room temperature metathesis of 2 with CH3CH2CH 2CH2C(CH2CH3)HCH2OCs yields the polymeric [{Cs(PyNH)(12C4)}∞] 6 containing tetranuclear cluster units, with concomitant cleavage of the N-Si bond. Such cleavage is prevented by low temperature synthesis, yielding the bridged dimer complex [{Cs(PyNSiMe3)(12C4)}2]·PhMe 7. The compounds have been characterised by multinuclear NMR spectroscopy, CHN microanalysis and (for 2.7) X-ray crystallography. The Royal Society of Chemistry 2001.
Coupling sign determination and isotope-induced chemical shifts 1Δ15/14N(29Si), 1Δ15/14N(119Sn) and 1Δ29/28Si(15N): Multinuclear magnetic resonance study of N-trimethylsilyl-, -stannyl-and -plumbyl-substituted 2-aminopyridines, 2,6-diaminopyridines and analogous 2-picolines
Wrackmeyer, Bernd,Kehr, Gerald,Zhou, Hong,Ali, Saqib
, p. 921 - 928 (2007/10/03)
2-Aminopyridines (1), 2-amino-3-methylpyridines (2) and 2,6-diaminopyridines (3), bearing N-trimethylsilyl, -stannyl or -plumbyl groups, and analogously substituted 2-picolines (4) were studied by 1H, 13C, 15N, 29Si, 119Sn and 207Pb NMR spectroscopy. Intramolecular N - Sn coordination became evident in the case of N,N-trimethylsilyl(trimethylstannyl)-2-aminopyridine (1e) and N,N-trimethylsilyl(trimethylstannyl)-N-trimethylsilyl-2,6-diaminopyridine (3f), in particular from their δ15N(amine) and δ119Sn data. Numerous coupling constants J(M,15N) and J(M,13C) (M = 29Si, 119Sn, 207Pb) were measured and, in the case of 2-[trimethylsilyl(trimethylstannyl)]methylpyridine (4e), absolute signs of nJ(119Sn, 13C) and n+1J(119Sn, 1H) were determined by appropriate 2D 13C/1H heteronuclear shift correlations. Isotope-induced chemical shifts 1Δ15/14N(29Si) (range -9 to -16 ppb) and 1Δ15/14N(119Sn) (range -32 to -55 ppb) were measured at natural abundance of 15N by using Hahn-echo extended polarization transfer pulse sequences. 1Δ29/28Si(15N) values (range of -2.4 to -6.0 ppb) were measured from 15N NMR spectra.
Reactions of Chloroboranes with Bifunctional Bases
Haubold, Wolfgang,Stanzl, Klaus
, p. 1659 - 1664 (2007/10/02)
Reaction of trichloroborane with 2-(trimethylsilylamino)pyridine (1b) and 2-(trimethylsilyloxy)pyridine (2b) yields the dimeric dichloro(2-pyridylamino)borane 4 and the dimeric dichloro(2-pyridyloxy)borane 5, respectively.In a 1:2 molar ratio tetrachlorodiborane(4) and 2b react to form the bicyclus 6, while equimolar amounts react in a complex way.
