20488-57-7Relevant articles and documents
I2-Mediated 2: H -indazole synthesis via halogen-bond-assisted benzyl C-H functionalization
Yi, Xiangli,Jiao, Lei,Xi, Chanjuan
, p. 9912 - 9918 (2016/10/31)
I2-Mediated benzyl C-H functionalization has been developed for the synthesis of 2H-indazoles, which features high efficiency, simple conditions and no need for metals. Mechanistic experiments and DFT calculations have revealed halogen bond assistance and a radical chain process for this reaction. The azo group and the bound iodine cooperate in the hydrogen abstraction step, which circumvents the thermodynamic disfavor of direct hydrogen abstraction by a simple iodine radical.
Rhenium-Catalyzed [4 + 1] Annulation of Azobenzenes and Aldehydes via Isolable Cyclic Rhenium(I) Complexes
Geng, Xiaoyu,Wang, Congyang
supporting information, p. 2434 - 2437 (2015/05/27)
The first Re-catalyzed [4 + 1] annulation of azobenzenes with aldehydes was developed to furnish 2H-indazoles via isolable and characterized cyclic ReI-complexes. For the first time, the acetate-acceleration effect is showcased in Re-catalyzed C-H activation reactions. Remarkably, mechanistic studies revealed an irreversible aldehyde-insertion step, which is in sharp contrast to those of previous Rh- and Co-systems. (Chemical Presented).
Axial functionalization of sterically hindered titanium phthalocyanines
Seikel, Elisabeth,Oelkers, Benjamin,Sundermeyer, Joerg
experimental part, p. 2709 - 2717 (2012/05/05)
Several axially functionalized, weakly aggregating titanium phthalocyanines (Pc)have been synthesized and characterized. Soluble titanium dichlorido tetrakis-(1,1,4,4-tetramethyl-6,7-tetralino)-porphyrazine [Pc#TiCl2] (5)has been prepared by re