Control of N- or C-Bridging Mode in Dimeric Butylmagnesium Silylamides
摘要:
The simple approach to cleave 4,S-dihydro-2-furyl with lithiated primary amines yields a wide range of N-alkyl-substituted (aminomethyl)silazanes. These are easily deprotonated by dibutylmagnesium, resulting in either magnesium disilylamides or butylmagnesium silylamides upon variation of the stochiometric ratios and reaction temperatures. The obtained dimeric butylmagnesium silylamide compounds [{(CH(3))(2)Si(CH(2)NC(5)H(10))(NR)}Mg(n-Bu)](2) (R = t-Bu,i-Pr), examined by single-crystal X-ray diffraction analysis, exhibit different bridging modes Mg-El-Mg (El = C, N) according to the steric demand of the ligand. This observation has been studied using theoretical methods.
Structural influence of steric factors and donor functions on lithium silylamides in non-coordinating solvents
作者:Victoria P. Colquhoun、Carsten Strohmann
DOI:10.1039/c1dt11550b
日期:——
the tridentate silazane (1R,2R)-N1-[(tert-butylamino)-dimethylsilyl}methyl]-N1,N2,N2-trimethylcyclohexane-1,2-diamine a mixed “dimer” of lithium silylamide and lithium silanolate with four-coordinate lithium centres was obtained. Additionally, a monomeric lithium silylamide was synthesised using the tridentate [bis(methoxyethyl)aminomethyl] side arm.
Control of N- or C-Bridging Mode in Dimeric Butylmagnesium Silylamides
作者:Victoria P. Colquhoun、Bors C. Abele、Carsten Strohmann
DOI:10.1021/om200587n
日期:2011.10.24
The simple approach to cleave 4,S-dihydro-2-furyl with lithiated primary amines yields a wide range of N-alkyl-substituted (aminomethyl)silazanes. These are easily deprotonated by dibutylmagnesium, resulting in either magnesium disilylamides or butylmagnesium silylamides upon variation of the stochiometric ratios and reaction temperatures. The obtained dimeric butylmagnesium silylamide compounds [(CH(3))(2)Si(CH(2)NC(5)H(10))(NR)}Mg(n-Bu)](2) (R = t-Bu,i-Pr), examined by single-crystal X-ray diffraction analysis, exhibit different bridging modes Mg-El-Mg (El = C, N) according to the steric demand of the ligand. This observation has been studied using theoretical methods.