Metal-Free-Catalyzed Synthesis of Allyl Nitriles via C<sub>sp<sup>2</sup></sub>–C<sub>sp<sup>3</sup></sub> Coupling between Olefins and Azobis (Alkyl-carbonitrile)
The metal-free-catalyzed synthesis of allyl nitriles from Csp2-Csp3 coupling between olefins and azobis was carried out. Key on this work was that the synthesis of allyl nitriles directly using olefin as a starting material was considered to be more efficient and economical than the alkyne, alkynyl carboxylic acid, or cinnamic acid used in previous works. Moreover, in this reaction, iodine served as
Catalytic Asymmetric Radical Diamination of Alkenes
作者:Fu-Li Wang、Xiao-Yang Dong、Jin-Shun Lin、Yang Zeng、Guan-Yuan Jiao、Qiang-Shuai Gu、Xian-Qi Guo、Can-Liang Ma、Xin-Yuan Liu
DOI:10.1016/j.chempr.2017.10.008
日期:2017.12
under Cu(I)/chiral phosphoric acid dual catalysis. This reaction allows for direct alkylamine incorporation and features high enantioselectivity, a broad substrate scope, widefunctional-grouptolerance, and mild reaction conditions, providing convenient and practical access to a wide range of highly enantio-enriched β-alkylamine-containing pyrrolidines. We have also achieved asymmetric azidoamination
A method has been disclosed of preparing ultrafine hydrophobic latex particles of polymers and copolymers by free radical emulsion polymerization in a water-based system, making use therefor, in order to polymerize or copolymerize monomers or monomer mixtures respectively, of at least one compound selected from the group consisting of dimers and cobalt complexes, acting as a chain transfer agent (CTA), wherein said latex particles have an average particle size of less than 100 nm, being more than 10% lower than if prepared in the absence of said CTA, characterized in that said polymerization is conducted in a water-based reaction in the presence of a chain transfer agent and of a surfactant, wherein said surfactant is present in a concentration versus said monomer or monomer mixture of from 5 up to 25% by weight for a non-ionic surfactant or from 0.05 up to 10% by weight for an ionic surfactant, more particularly a surfactant in a concentration below twice its critical micelle concentration.
Graft copolymer, composition containing the same and molded object thereof, and process for producing the same
申请人:Takamura Masumi
公开号:US20050261436A1
公开(公告)日:2005-11-24
A graft copolymer having a structure in which a vinyl copolymer segment formed from a vinyl monomer having an acid is suspended in a molecular chain of a polyolefin resin segment via a β-substituted propylene group is obtained, by reaction of polyolefin resin having β-substituted propenyl group as a pendant and a vinyl monomer having an acid, and further a graft copolymer composition containing the same and a molded product thereof are obtained. The obtained graft copolymer, the composition containing the same and the molded product thereof are excellent in adhesive property to a polar material and scratch resistance.