107495-83-0Relevant academic research and scientific papers
Synthesis and reactivity of N-aryl substituted N-heterocyclic silylenes
Zark,Sch?fer,Mitra,Haase,Saak,West,Müller
experimental part, p. 398 - 408 (2010/05/12)
The synthesis of two N-aryl substituted 2-silaimidazolidenes 9a, b by metal-reduction of the appropriate silicon(IV) heterocycles is reported. Structural as well as spectroscopic data obtained for the N-aryl substituted N-heterocyclic silylenes (NHSi) are very close to those obtained previously for their N-alkyl substituted counterparts. NHSis 9a, b are used as starting materials for the synthesis of a series of dichalcogenadisiletanes 19-24 and for of a mono silylene tungsten complex 29. The reactivity studies revealed only marginally differences between the N-aryl substituted NHSis 9a, b and previously described N-alkyl substituted silylenes.
Synthesis and Reactions of N-Silylated Ene-diamines, II. - Cycloadditions: Synthesis of Derivatives of 1,4-Diamino-1,3-butadiene-2,3-dicarboxylic Acid
Dieck, Heindirk tom,Zettlitzer, Michael
, p. 795 - 802 (2007/10/02)
From 1,4-diaza-1,3-dienes 1, alkali metals, and corresponding chlorosilanes 1,3-diaza-2-sila-4-cyclopentenes 2, acyclic analogues 3, and also a spiro-bis(enediamine) 4 are obtained.Compounds 2 contain a reactive, electron-rich C=C-double bond, to which tetracyanoethylene adds rapidly.Final product is the metathetic diolefin 6 which two (aminomethylene)malononitrile functions.Addition of acetylenedicarboxylic esters to 2 gives -bicyclic 9, which exhibits a very facile thermal rearrangement to the diazasilacycloheptadiene 10. 1,4-Diamino-1,3-butadiene-2,3-dicarboxylic esters 12 result from the sovolysis of the N-Si bonds and exhibit a slow equilibration between different E/Z configurations.The solvolysis can be interrupted after the splitting of only one N-Si bond (13) or - in acidic medium - can be directed to the formation of the 3,4-pyrroledicarboxylic ester 14.The faster hydrolysis of the esters 9 or 10 in aqueous alkali yields a partial lactam or salts of the bis(alkylamino)butadienedicarboxylic acid (15, 16).
