Use of Potassiumtert-Butoxide to Increase the Nucleophilicity of an Imine Stabilizedo-Tolyl Lithium Derivative

1996 ◽  
Vol 26 (12) ◽  
pp. 2281-2284 ◽  
Author(s):  
Jerome F. Hayes ◽  
Michael B. Mitchell
Keyword(s):  
Lithium Derivative

Synthesis and structure of a new fluorinated β-ketoiminato ligand and its lithium derivative

2002 ◽  
Vol 118 (1-2) ◽  
pp. 131-134 ◽  
Author(s):  
Dante Neculai ◽  
Ana Mirela Neculai ◽  
Herbert W. Roesky ◽  
Jörg Magull ◽  
Gàbor Bunkòczi
Keyword(s):  
Lithium Derivative

Synthese und Kristallstruktur des 2.4-Di-terf-butoxy-2,4-di-terfbutylcyclodisilazans / Synthesis and Crystal Structure of 2.4-Di-terf-butoxy-2,4-di-terrbutylcyclodisilazane

1995 ◽  
Vol 50 (5) ◽  
pp. 844-847 ◽  
Author(s):  
Sven Dielkus ◽  
Dorothee Großkopf ◽  
Regine Herbst-Irmer ◽  
Uwe Klingebiel
Keyword(s):  
Crystal Structure ◽  
Molar Ratio ◽  
Synthesis And Crystal Structure ◽  
Lithium Derivative ◽  
Nitrogen Ring

Abstract Me3CSiHal3 react with LiOCMe3 to give Me3CO(Me3C)SiHal2 (HaI = F (1), Cl (3)). The aminofluorosilane, Me3CO(Me3C)SiFNH2 (2), is formed in the reaction of 1 with LiNH2. The diaminosilane Me3CO(Me3C)Si(NH2)2 (4) is obtained from the reaction of 2 with ammonia. 4 reacts with LiC4H9 to give the lithium derivative Me3CO(Me3C)Si(NHLi)NH2 (5). In a molar ratio 1:1 the reaction of 5 and 1 leads to the formation of the 1-amino-3-fluoro-disilazane Me3CO(Me3C)SiF- NH - SiNH2(CMe3)OCMe3 (6) and in a molar ratio 2:1 to the four-membered silicon nitrogen ring [Me3CO(M e3C)Si-NH]2 (7). The crystal structure of 7 was determined.

Low-Temperature Reactions of α-Bromopropanoyl Chloride with Lithium Derivative of Ethyl Acetate

2019 ◽  
Vol 55 (11) ◽  
pp. 1726-1730
Author(s):  
Z. R. Valiullina ◽  
L. S. Khasanova ◽  
A. M. Galeeva ◽  
N. K. Selezneva ◽  
M. S. Miftakhov
Keyword(s):  
Low Temperature ◽  
Ethyl Acetate ◽  
Lithium Derivative

Order and disorder of vanadyl chains: crystal structures of vanadyl dihydrogen arsenate (VO(H2AsO4)2) and the lithium derivative Li4VO(AsO4)2

1992 ◽  
Vol 31 (6) ◽  
pp. 1045-1049 ◽  
Author(s):  
Miguel A. G. Aranda ◽  
J. Paul Attfield ◽  
Sebastian Bruque ◽  
Maria Martinez-Lara
Keyword(s):  
Crystal Structures ◽  
Order And Disorder ◽  
Lithium Derivative

SiF-NH-Funktionelle Cyclodisilazane – Synthese und Reaktivität / SiF-NH-Functional Cyclodisilazane – Synthesis and Reactivity

2003 ◽  
Vol 58 (10) ◽  
pp. 939-949 ◽  
Author(s):  
Clemens Reiche ◽  
Uwe Klingebiel ◽  
Mathias Noltemeyer
Keyword(s):  
Crystal Structures ◽  
Liquid Ammonia ◽  
Lithium Derivative ◽  
Derivatives Of

Dichlorosilanes with bulky substituents R(Me3C)SiCl2 react with liquid ammonia to give geminal silyldiamines [R(Me3C)Si(NH2)2, 1: R = CH2 Me, 2: R = CHMe2]. In the reaction of the monolithium derivatives of these compounds with halosilanes 1-amino-1.3-disilazanes are obtained [(NH2)(Me3C)RSi-NH-SiR1R2R3; 3: R = CMe3, R1 = R2 = R3 = Me; 4: R = R1 = CMe3, R2 = R3 = Me; 5: R = R1 = R2 = CMe3, R3 = H; 6: R = R1 = CMe3, R2 = Me, R3 = F; 7: R = CHMe2, R1 = R2 = R3 = Me]. If monolithiated diamines are treated with trifluorosilanes cyclisation occurs to give (NH-Si(CMe3)2-NH-SiFR)cyclodisilazanes [R = N(SiMe3)(CMe3) (8); R = N(SiMe2CMe3)2 (9)]. 50% of the educts are recovered. The spirocyclic compound 10 is isolated from the reaction of the dilithiated 1-amino-1.3-disilazane 3 with F3SiN(SiMe2CMe3)2. NH-SiF-Functional cyclodisilazanes can be obtained in the reaction of the dilithium derivative of compound 4 with trifluorosilanes [(N(SiMe2CMe3)-Si(CMe3)2-NH-SiFR), R = Ph (11); R = CMe3 (12)]. The lithium derivative of 12 crystallises with TMEDA as adduct 13. In the reaction of the lithiated compound 12 with Me3SiCl, LiCl elimination and substitution of the N-atom is observed (14). The treatment of 13 with PhCHO leads to a 1.3-diaza-5-oxa-2.4-disila-cyclohexane (15 a, b). Starting from lithiated 12 the methoxysubstituted cyclodisiloxane 16 is accessible in the reaction with MeOH. As result of its reactivity towards Me2SiF2 the fluorosilyl-substituted cyclodisilazane 17 is obtained. Crystal structures of 9-11 and 13 have been determined.

ChemInform Abstract: State in Solution, Structure and Regioselectivities of Reactions of Lithium Derivative of 1-(2-Methoxyphenyl)-3,3-diphenylpropyne.

ChemInform ◽  
2010 ◽  
Vol 29 (11) ◽  
pp. no-no
Author(s):  
P. I. DEM'YANOV ◽  
D. P. KRUT'KO ◽  
M. V. BORZOV ◽  
E. V. LUK'YANOV ◽  
V. S. PETROSYAN
Keyword(s):  
Solution Structure ◽  
Lithium Derivative

The highly diastereocontrolled addition of the lithium derivative of tert-butyldimethylsilyl propargyl ether to

1997 ◽  
Vol 8 (15) ◽  
pp. 2627-2631 ◽  
Author(s):  
Henryk Gruza ◽  
Krzysztof Kiciak ◽  
Antoni Krasiński ◽  
Janusz Jurczak
Keyword(s):  
Lithium Derivative ◽  
Propargyl Ether
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