Synthesis, Biochemical Evaluation and Rationalisation of a Series of 3,5- Dibromo Derivatives of 4-Hydroxyphenyl Ketone-Based Compounds as Probes of the Active Site of Type 3 of 17β-Hydroxysteroid Dehydrogenase (17β-HSD3) and the Role of Hydrogen Bonding Interaction in the Inhibition of 17β-HSD3
Regioselective and high-yielding bromination of aromatic compounds using hexamethylenetetramine–bromine
作者:Majid M. Heravi、Nafiseh Abdolhosseini、Hossein A. Oskooie
DOI:10.1016/j.tetlet.2005.10.041
日期:2005.12
method for bromination of aromaticcompounds in the presence of a stoichiometric amount of hexamethylenetetramine–bromine (HMTAB) as an efficient reagent in dichloromethane is reported. The selectivity depends on the temperature and nature of the substituent on the substrate. The reactivity of this reagent was increased by supporting it to silica gel for bromination of less activated compounds.
An eco-friendly Co(OAc)2-catalyzed aerobic oxidation of 4-benzylphenols into 4-hydroxybenzophenones
作者:Jian-Gang Huang、Ying Guo、Jian-An Jiang、Hong-Wei Liu、Ya-Fei Ji
DOI:10.1007/s11164-014-1801-8
日期:2015.10
An undecorated Co(OAc)2-catalyzed aerobic oxidation system has been reported that enables direct transformation of 4-benzylphenols into the corresponding 4-hydroxybenzophenones. The procedure is especially suitable for electron-withdrawing group-containing substrates, which are commonly inefficient to conduct this category of oxidation. Based on well-defined p-benzoquinone methides and the confirmed ethereal intermediate, a plausible mechanism was depicted.