One-pot catalysis of dehydrogenation of cyclohexanones to phenols and oxidative Heck coupling: expedient synthesis of coumarins
作者:Donghee Kim、Minsik Min、Sungwoo Hong
DOI:10.1039/c3cc41296b
日期:——
One-pot reactions leading to highly functionalized coumarins have been developed via a Pd(II)-catalyzed dehydrogenation-oxidative Heck-cyclization process.
通过Pd(II)催化的脱氢-氧化Heck环化过程已经开发出了导致高度功能化香豆素的一锅法反应。
Convenient Access to <i>meta</i>
-Substituted Phenols by Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling and Oxidation
作者:Zi Wang、Arturo Orellana
DOI:10.1002/chem.201702651
日期:2017.8.22
meta‐substituted phenols in which a single palladium catalyst accomplishes a Suzuki–Miyaura cross‐coupling between a β‐chlorocyclohexenone and an arylboronic acid, and oxidation of the resulting cyclohexenone to the corresponding phenol upon introduction of a terminal oxidant and electron transfer mediator. Notably, this method also allows ready access to ortho, meta‐disubstituted phenols, sterically congested
Synthesis of water soluble Pd‐Piperidoimidazolin‐2‐ylidene complexes and their catalytic activities in neat water
作者:Sinem Çakır、Hayati Türkmen
DOI:10.1002/aoc.5499
日期:2020.4
Through the strategy of water soluble N‐heterocyclic carbene (NHC) ligand, Pd‐catalyzed reactions were developed in aqueous media. Therefore, four new piperidoimidazolinium salts (1a‐d) consisting of sulfonate (a), esther (b, c) and carboxylic acid (d) functionalities and their water‐soluble Pd‐NHC complexes (2a‐d) were synthesized. The new compounds were characterized by elemental analysis, FTIR,
Synthesis and Biological Evaluation of Spiro-&#x3B4;-lactones as Inhibitors of 17&#946;-Hydroxysteroid Dehydrogenase Type 2 (17&#946;-HSD2)
作者:Kuiying Xu、Marie Wetzel、Rolf W. Hartmann、Sandrine Marchais-Oberwinkler
DOI:10.2174/157018011795514230
日期:2011.6.1
17β-Hydroxysteroiddehydrogenasetype2 (17β-HSD2) catalyzes the oxidation of the potent estradiol (E2) to the less active estrogen estrone (E1). Inhibitors of this enzyme should maintain the local level of E2 in bone tissue when the E2 concentration in the circulation drops and therefore might be useful for the treatment of osteoporosis. In this work, novel non-steroidal spiro-δ-lactone compounds