An efficient tandem elimination–cyclization–desulfitative arylation of 2-(gem-dibromovinyl)phenols(thiophenols) with sodium arylsulfinates
作者:Wei Chen、Pinhua Li、Tao Miao、Ling-Guo Meng、Lei Wang
DOI:10.1039/c2ob27232f
日期:——
An efficient tandem eliminationâcyclizationâdesulfitative arylation of 2-(gem-dibromovinyl)phenols(thiophenols) with sodium arylsulfinates has been developed. In the presence of TBAFâPdCl2âCu(OAc)2âNEt3, the reactions generated 2-arylbenzofurans(thiophenes) with good yields in one-pot under ligand-free conditions.
yields under the standard conditions. An efficient palladium-catalyzed addition of arylboronic acids to aliphatic nitriles has been developed, providing a wide range of alkylarylketones in moderate to excellent yields. It is noteworthy that sequential addition and intramolecular annulation reaction of 2-(2-hydroxyphenyl)acetonitriles with arylboronic acids are also conducted smoothly to afford 2-arylbenzofurans
Palladium-Catalyzed Addition of Potassium Aryltrifluoroborates to Aliphatic Nitriles: Synthesis of Alkyl Aryl Ketones, Diketone Compounds, and 2-Arylbenzo[<i>b</i>]furans
developed, leading to a wide range of alkylarylketones with moderate to excellent yields. Moreover, several dinitriles (e.g., malononitrile, glutaronitrile, and adiponitrile) were applicable to this process for the construction of 1,3-, 1,5-, or 1,6-dicarbonyl compounds. The scope of the developed approach is successfully explored toward the one-step synthesis of 2-arylbenzo[b]furans via sequential
已经开发了钯催化的芳基三氟硼酸钾加成到脂肪族腈中的方法,从而产生了范围广泛的烷基芳基酮,并具有中等至极好的收率。此外,几种二腈(例如丙二腈,戊二腈和己二腈)适用于该方法,用于构建1,3-,1,5-或1,6-二羰基化合物。通过顺序加成和分子内环化反应,一步一步合成2-芳基苯并[ b ]呋喃已成功探索了所开发方法的范围。该方法学接受了广泛的底物,并适用于文库合成。
One-pot synthesis of 2-substituted benzo[b]furans via Pd–tetraphosphine catalyzed coupling of 2-halophenols with alkynes
作者:Rong Zhou、Wei Wang、Zhi-jie Jiang、Kun Wang、Xue-li Zheng、Hai-yan Fu、Hua Chen、Rui-xiang Li
DOI:10.1039/c4cc00815d
日期:——
A catalyst composed of [Pd(η(3)-C3H5)Cl]2 and N,N,N',N'-tetra(diphenylphosphinomethyl)pyridine-2,6-diamine (L) was found to be effective for one-pot synthesis of 2-substitutedbenzo[b]furansfrom 2-halophenols and alkynes. For 2-bromo-3-hydroxypyridine, the catalyst loading could be as low as 1 ppm and the turnover number (TON) was up to 870,000.
[EN] HYDROPHOBIC COMPOUNDS FOR OPTICALLY ACTIVE DEVICES<br/>[FR] COMPOSÉS HYDROPHOBES POUR DISPOSITIFS OPTIQUEMENT ACTIFS
申请人:MERCK PATENT GMBH
公开号:WO2018149852A1
公开(公告)日:2018-08-23
The present invention relates to novel compounds (I) particularly to compounds comprising a photoactive unit, said novel compounds being particularly suitable for compositions and ophthalmic devices as well as to compositions and ophthalmic devices comprising such compounds.