1,3-diethynylallenes: stable monomers, length-defined oligomers, asymmetric synthesis, and optical resolution was written by ter Wiel, Matthijs K. J.;Odermatt, Severin;Schanen, Patrick;Seiler, Paul;Diederich, Francois. And the article was included in European Journal of Organic Chemistry in 2007.Related Products of 5351-07-5 This article mentions the following:
A series of differently substituted 1,3-diethynylallenes (DEAs) have been synthesized, confirming that the previously introduced construction protocols tolerate a variety of functional groups. The new DEAs bear at least one polar group to facilitate enantiomer separations on chiral stationary phases and to allow further functionalization. They are thermally and environmentally stable compounds since bulky substituents next to the cumulene moiety suppress the tendency to undergo [2 + 2] cyclodimerization. A series of length-defined oligomers were obtained as mixtures of stereoisomers by oxidative coupling of a monomeric DEA under Glaser-Hay conditions. The electronic absorption data indicate a lack of extended π-electron conjugation across the oligomeric backbone due to the orthogonality of the allenic π-systems. Remarkably, even complex mixtures of stereoisomers only yield one single set of NMR signals, which under-lines the low stereodifferentiation in acyclic allenoacetylenic structures. Optical resolution of DEAs represents an amazing challenge, and preliminary results on the anal. level are reported. Asym. synthesis by Pd-mediated SN2′-type cross-coupling of an alkyne to an optically pure bispropargylic precursor opens another promising route to optically active allenes with stereoselectivities currently reaching up to 78% ee. In the experiment, the researchers used many compounds, for example, 2-(4-Methoxyphenyl)-2-methylpropanenitrile (cas: 5351-07-5Related Products of 5351-07-5).
2-(4-Methoxyphenyl)-2-methylpropanenitrile (cas: 5351-07-5) belongs to nitriles. Trimerization of aromatic nitriles requires harsh reaction conditions, high temperatures, long reaction times, and pressure. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Related Products of 5351-07-5
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts