13368-42-8Relevant articles and documents
Insertion of CO2 and related heteroallenes into the Si–N-bond of methyl(N-morpholino)silanes
Herbig, Marcus,B?hme, Uwe,Kroke, Edwin
, p. 20 - 28 (2018)
Trimethyl(N-morpholino)silane (Me3SiMorph) and dimethyl-di(N-morpholino)silane (Me2SiMorph2) were synthesised. The insertion reactions of both silanes with CO2, n-butylisocyanate (nBuNCO), phenylisocyanate (PhNCO), methylisothiocyanate (MeNCS), n-butylisothiocyanate (nBuNCS) and phenylisothiocyanate (PhNCS) into the Si–N-bond were investigated. One CO2 molecule inserts into each Si–N-bond forming carbamoylic moieties. The insertion reaction of isocyanates depends on the organic substituents bound to the heteroallene unit. PhNCO inserts twofold forming a biuret moiety, while nBuNCO yields urea units by insertion of just one molecule per Si–N-bond. The isothiocyanates are less reactive forming thiourea moieties. Aliphatic isothiocyanates furnish equilibria between the reactants and the insertion product at room temperature. All products have been characterized by spectroscopic methods. Single crystal X-ray diffraction analyses of five insertion products have been performed. The observed reactivity is discussed on the basis of NBO charges and calculated Gibbs free energies of the insertion reactions.
Low cost apparatus for rapid boiling point determination of small air sensitive samples under inert atmosphere
Herbig, Marcus,Kroke, Edwin
, p. 81 - 84 (2017)
The boiling point is a characteristic property of substances and mixtures. We have developed a new low cost apparatus which uses standard Schlenk technique for measuring the boiling point of small samples (0.2?ml) under inert atmosphere.
An Alumino-Mannich Reaction of Organoaluminum Reagents, Silylated Amines, and Aldehydes
Tarasewicz, Anika,Ensan, Deeba,Batey, Robert A.
supporting information, p. 6071 - 6074 (2018/04/27)
A multi-component coupling using organoaluminum reagents, silylated amines, and aldehydes results in the formation of tertiary amines. Both alkenyl- and alkylaluminum reagents undergo reaction with iminium ion substrates for which the corresponding Petasis borono-Mannich reactions are unsuccessful.