Electroreductive Coupling of Aromatic Acyl Bromides to 1,2-Diketones
作者:Naoki Kise、Nasuo Ueda
DOI:10.1246/bcsj.74.755
日期:2001.4
The direct electroreduction of aromatic acyl bromides gave aromatic 1,2-diketones. The best result was obtained using a Pb cathode in acetonitrile containing Bu4NClO4 as a supporting electrolyte. Aromatic acyl bromides substituted by an electron-donating group afforded 1,2-diketones in moderate-to-good yields, whereas acylated endiols were formed exclusively from aromatic acyl bromides substituted by an electron-withdrawing group.
Catalyst components for the polymerization of olefins
申请人:BASELL POLIOLEFINE ITALIA S.R.L.
公开号:US10246532B2
公开(公告)日:2019-04-02
A solid catalyst component which exhibits high activity and stereospecificity in the polymerization of olefins made from or containing Mg, Ti and an electron donor of formula (I)
where R and R1 are selected from the group consisting of C1-C20 hydrocarbon groups, C6-C14 aryl or alkylaryl groups hydrocarbon groups, optionally containing a heteroatom selected from the group consisting of halogens, P, S, N, and O; R2 to R11 groups, equal to or different from each other, are hydrogen, halogen or C1-C15 hydrocarbon groups which can be optionally fused together to form one or more cycles with the proviso that R6 and R11 cannot join together to form a phenyl ring.
Abstract The electrochemical reduction of 1,2-di-alkylphenyl-1,2-ethenediol di-alkylbenzoates, on a Hg cathode in DMF/LiClO4, yields 1,2-di-alkylphenylacetylenes. The enediol diesters were obtained from alkylbenzoyl chlorides, by the same method, using dry acetone/LiClO4.