Rhodium and ruthenium porphyrins catalyze the one-pot formation of biaryl derivatives from arylethynes with high selectivity, giving interesting derivatives not easy to obtain using other different methods; the porphyrin catalysts can be recovered and reused after several experiments with no change of activity.
Fe‐Catalyzed Intramolecular Cross‐Dehydrogenative Arylation (CDA), Efficient Synthesis of 1‐Arylnaphthalenes and 4‐Arylcoumarins
作者:Haiyan Diao、Changcheng Wang、Zhen Zhang、Zhangjie Shi、Feng Liu
DOI:10.1002/hlca.202100056
日期:2021.7
Direct cross-dehydrogenative coupling of different inert C−H bonds is the most straightforward and environmentally benign method to construct C−C bonds. In this paper, we developed an iron-catalyzed intramolecular cross-dehydrogenative arylation (CDA) between benzylic C(sp3)H bond and aromaticC(sp2)H bond. From the readily available linear substrates, 1-arylnaphthalenes and 4-arylcoumarins can be
method of the sum of the free valence indices in the first excited state (ΣF*) of the terminal atoms concerned in the photocyclizations of 1,4-diaryl-1,3-butadienes give values which are accurate guides in predicting the photoproducts obtained in the photocyclization-oxidation reactions of 1,4-diaryl-1,3-butadienes. Irradiation of 1,4-di-α-naphthyl-1,3-butadiene gave 1-α-naphthylphenanthrene. The pho
514. Polymerisation of thiophen derivatives. Part V. The self-condensation of 4 : 5- and 6 : 7-benzothionaphthen 1 : 1-dioxides. A new route to 1-1′-and 4-2′-naphthylphenanthrene