[EN] PROCESS FOR HYDROCYANATION OF TERMINAL ALKYNES<br/>[FR] PROCÉDÉ D'HYDROCYANATION D'ALCYNES TERMINAUX
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2018210631A1
公开(公告)日:2018-11-22
The present invention refers to a process for a Rh-catalyzed Anti-Markovnikov hydrocyanation of terminal alkynes which process discloses, for the first time, the highly stereo- and regio-selective hydrocyanation of terminal alkynes to furnish E- configured alkenyl nitriles and the catalyst used in the present process.
Rh-Catalyzed Anti-Markovnikov Hydrocyanation of Terminal Alkynes
作者:Fei Ye、Junting Chen、Tobias Ritter
DOI:10.1021/jacs.7b03749
日期:2017.5.31
We report the first highly stereo- and regioselective hydrocyanation of terminal alkynes to furnish E-configured alkenyl nitriles. Acrylonitriles can be accessed on gram scale with broad substrate scope and functional group tolerance. The hydrocyanation reaction employs acetone cyanohydrin as a practical alternative to HCN gas.
我们报告了第一个高度立体和区域选择性的末端炔烃氢氰化反应,以提供 E 构型的烯基腈。丙烯腈可以在克级获得,具有广泛的底物范围和官能团耐受性。氢氰化反应使用丙酮氰醇作为 HCN 气体的实用替代品。
Nickel-catalyzed regioselective hydrocyanation of terminal alkynes by assistance of a tosyl group
hydrocyanation of terminal alkynes is described. A tosylamide functionality at the propargyl position was the most suitable group for controlling the regiochemistry for CCN bond formation as well as rate enhancement. A gram-scale synthesis was achieved by minimizing the catalyst loading to 2 mol%. The major HCN adduct could be transformed to the corresponding indoline through construction of a benzylic quaternary
Process for the preparation of 5-oxohexane nitriles and the compound 2,4-dimethyl-5-oxohexane nitrile
申请人:DSM N.V.
公开号:EP0437290A1
公开(公告)日:1991-07-17
The invention relates to a process for the preparation of 5-oxohexane nitriles according to Formula 1,
where at least R₁ or R₂ is an electron-donating group and at least one of the groups R₃, R₄ or R₅ is not hydrogen, by catalylic conversion of a methyl ketone according to Formula 2
where R₁ and R₂ denote the same as in Formula 1, and an α-β unsaturated nitrile according to Formula 3
in the presence of a strong base as a catalyst.
The invention furthermore relates to the new substance 2,4-dimethyl-5-oxohexane nitrile.
The obtained 5-oxohexane nitriles can be advantageously used in the preparation of 2-methylpyridines.
[EN] CATALYSED ALTERNATING COPOLYMERISATION AND PRODUCT
申请人:——
公开号:WO1981001289A1
公开(公告)日:1981-05-14
(EN) A Process for the preparation of a copolymer comprising sequences of alternating monomer residues, which process comprises reacting at least one donor monomer with at least one acceptor monomer in the presence of: 1) a transition metal complex comprising at least one (Alpha)-acid ligand; 2) an organic compound, which may be a polymer, comprising at least one carbon-halogen bond, an acetylenic bond or an ethylenic bond conjugated with one or more electron attracting (-R) groups; and 3) a Lewis acid. (FR) Procede de preparation d'un copolymere comprenant des sequences de restes monomeres alternes, ce procede se basant sur la reaction entre au moins un monomere donneur et un monomere accepteur en presence de: (i) un complexe de metal de transition comprenant au moins un groupe de coordination (Alpha)-acide; (ii) un compose organique, qui peut etre un polymere, comprenant au moins une liaison carbone-halogene, une liaison acetylenique ou une liaison ethylenique conjuguee avec un ou plusieurs groupes d'attraction d'electrons (-R); et (iii) un acide de Lewis.