[EN] DERIVATIVES OF 6-SUBSTITUTED TRIAZOLOPYRIDAZINES AS REV-ERB AGONISTS [FR] DÉRIVÉS DE TRIAZOLOPYRIDAZINES 6-SUBSTITUÉES EN TANT QU'AGONISTES DE REV-ERB
Rad transition: The combination of transition‐metal‐catalyzed CHactivation and a NHPI‐initiated radical process is essential for the title transformation. The neutral conditions and the ideal oxidant, molecular oxygen, make this hydroxylation environmentally friendly and practical. NHPI=N‐hydroxyphthalimide.
Design and synthesis of ruthenium bipyridine catalyst: An approach towards low-cost hydroxylation of arenes and heteroarenes
作者:Sanchari Shome、Surya Prakash Singh
DOI:10.1016/j.tetlet.2017.08.037
日期:2017.9
Two new ruthenium bipyridine complexes were designed and synthesized for intermolecular Csp2-H hydroxylation. An environmentally begin and inexpensive oxidant was employed as an oxygen source thereby enhancing its applicability and resulting in the remarkable increase of yield. In the catalytic process a ruthenium (IV) cationic complex is formed which enables the regioselective CO bonds formation and
Photo-Induced <i>ortho</i>-C–H Borylation of Arenes through In Situ Generation of Rhodium(II) Ate Complexes
作者:Jin Tanaka、Yuki Nagashima、Antônio Junio Araujo Dias、Ken Tanaka
DOI:10.1021/jacs.1c05859
日期:2021.8.4
Photoinduced in situ “oxidation” of half-sandwich metal complexes to “high-valent” cationic metal complexes has been used to accelerate catalytic reactions. Here, we report the unprecedented photoinduced in situ “reduction” of half-sandwich metal [Rh(III)] complexes to “low-valent” anionic metal [Rh(II)] ate complexes, which facilitate ligand exchange with electron-deficient elements (diboron). This
Rhodium(III)-Catalyzed Selective C–H Acetoxylation and Hydroxylation Reactions
作者:Yunxiang Wu、Bing Zhou
DOI:10.1021/acs.orglett.7b01494
日期:2017.7.7
An efficient Cp*Rh(III)-catalyzed, chelation-assisted C(sp2)–H acetoxylation and hydroxylation reaction has been developed for the first time. The reaction proceeds under mild conditions and allows for selective preparation of C–H acetoxylation and hydroxylation products, thus providing a good complement to previous C–H oxygenation reactions and expanding the field of Cp*Rh(III)-catalyzed C–H functionalizations
Direct functionalization of the ubiquitous CHbond is receiving much attention because complex structures can be formed from simple precursors. This paper reports a useful method for the direct hydroxylation of 2‐phenylpyridines using palladium(II) chloride and aqueous hydrogen peroxide. In this method, hydrogen peroxide, which has high atom efficiency, is employed as the oxidant and phenol derivatives