Room‐Temperature Palladium‐Catalyzed Deuterogenolysis of Carbon Oxygen Bonds towards Deuterated Pharmaceuticals
作者:Wei Ou、Xudong Xiang、Ru Zou、Qing Xu、Kian Ping Loh、Chenliang Su
DOI:10.1002/anie.202014196
日期:2021.3.15
Site‐specific incorporation of deuterium into drug molecules to study and improve their biologicalproperties is crucial for drug discovery and development. Herein, we describe a palladium‐catalyzed room‐temperature deuterogenolysis of carbon–oxygen bonds in alcohols and ketones with D2 balloon for practical synthesis of deuterated pharmaceuticals and chemicals with benzyl‐site (sp3 C−H) D‐incorporation. The
[EN] QUINUCLIDINE DERIVATIVES AND THEIR USE AS MUSCARINIC RECEPTOR ANTAGONISTS FOR THE TREATMENT OF ASTHMA AND CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD)<br/>[FR] DÉRIVÉS DE QUINUCLIDINE ET LEUR UTILISATION COMME ANTAGONISTES DES RÉCEPTEURS MUSCARINIQUES POUR LE TRAITEMENT DE L'ASTHME ET DE LA BRONCHOPNEUMOPATHIE CHRONIQUE OBSTRUCTIVE (BPCO)
申请人:ASTRAZENECA AB
公开号:WO2009139709A1
公开(公告)日:2009-11-19
The invention provides compounds of formula (I) wherein R1, R2, R3, R4, R5, Het1, n, Y and X are as defined in the specification, a process for their preparation, pharmaceutical compositions containing them, a process for preparing pharmaceutical compositions, their use in therapy and intermediates of use in their preparation.
Iodobenzene-catalyzed oxidative cleavage of olefins to carbonyl compounds
作者:Lele Du、Zechao Wang、Junliang Wu
DOI:10.1016/j.tetlet.2020.152204
日期:2020.8
A metal-free approach for the oxidativecleavage of carbon–carbon double bonds of olefins to carbonyl compounds was established by using oxidant m-CPBA and non-metallic organocatalyst PhI in toluene/H2O. A broad scope of aromatic olefins was used. All the reactions proceeded smoothly at 35 °C in short reaction time to furnish the respective mono- and double carbonyl compounds selectively in moderate
通过使用氧化剂m -CPBA和甲苯/ H 2 O中的非金属有机催化剂PhI,建立了一种无金属的方法将烯烃的碳-碳双键氧化裂解为羰基化合物。使用了广泛的芳族烯烃。所有反应均在35°C的短时间内顺利进行,以中等至良好的收率选择性提供各自的单羰基化合物和双羰基化合物。
Oxidative α-C–C Bond Cleavage of 2° and 3° Alcohols to Aromatic Acids with O<sub>2</sub> at Room Temperature via Iron Photocatalysis
cleavage of unfunctionalized secondary (2°) and tertiary alcohols (3°) is essential for valorization of macromolecules and biopolymers. We developed a blue-light-driven iron catalysis for aerobic oxidation of 2° and 3° alcohols to acids via α-C–C bond cleavages at room temperature. The first example of oxygenation of the simple tertiary alcohols was reported. The iron catalyst and blue light play critical
<i>p</i>-Toluenesulfonic Acid Adsorbed on Silica Gel: An Efficient Dehydrating Agent of Alcohols
作者:Franco D'Onofrio、Arrigo Scettri
DOI:10.1055/s-1985-31463
日期:——
Secondary and tertiary alcohols are efficiently dehydrated by reaction with p-toluenesulfonic acid supported on silica gel. In particular, the procedure allows the direct conversion of 3-hydroxy-steroids into Î2-olefins or Î3,5-dienes, without passing through the mesylate or tosylate esters.