描述了路易斯酸催化的2-取代的环丙烷1,1-二羧酸酯与硫酮的反应。当使用AlCl 3作为路易斯酸时,在温和的条件下以立体有择的方式高产率地获得了具有两个相邻的季碳原子的高度取代的四氢噻吩。此外,成功地采用了分子内方法来获得硫桥[ n .2.1]双环系统。在类似条件下,硒酮(较重的类似物)的转化导致形成各种四氢硒代苯。
描述了路易斯酸催化的2-取代的环丙烷1,1-二羧酸酯与硫酮的反应。当使用AlCl 3作为路易斯酸时,在温和的条件下以立体有择的方式高产率地获得了具有两个相邻的季碳原子的高度取代的四氢噻吩。此外,成功地采用了分子内方法来获得硫桥[ n .2.1]双环系统。在类似条件下,硒酮(较重的类似物)的转化导致形成各种四氢硒代苯。
A compound having the structure
useful for treatment or prevention of cardiovascular diseases, endothelial dysfunction, diastolic dysfunction, atherosclerosis, hypertension, angina pectoris, thromboses, restenoses, myocardial infarction, strokes, cardiac insufficiency, pulmonary hypertonia, erectile dysfunction, asthma bronchiale, chronic kidney insufficiency, diabetes, or cirrhosis of the liver in a human or animal patient.
Kinetic Resolution of <i>sec</i>
-Thiols by Enantioselective Oxidation with Rationally Engineered 5-(Hydroxymethyl)furfural Oxidase
作者:Mathias Pickl、Alexander Swoboda、Elvira Romero、Christoph K. Winkler、Claudia Binda、Andrea Mattevi、Kurt Faber、Marco W. Fraaije
DOI:10.1002/anie.201713189
日期:2018.3.5
Various flavoproteinoxidases were recently shown to oxidize primary thiols. Herein, this reactivity is extended to sec‐thiols by using structure‐guided engineering of 5‐(hydroxymethyl)furfural oxidase (HMFO). The variants obtained were employed for the oxidative kinetic resolution of racemic sec‐thiols, thus yielding the corresponding thioketones and nonreacted R‐configured thiols with excellent
The present invention provides new derivatives of 4- or 5-aminosalicylic acid, and a pharmaceutical composition containing these derivatives of 4- or 5-aminosalicylic acid as active ingredients, useful for the treatment of intestinal diseases such as inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS) and for the prevention/treatment of colon cancer. More particularly, these derivatives comprise a hydrogen sulfide releasing moiety linked via an azo, an ester, an anhydride, a thioester or an amide linkage to a molecule of 4- or 5-aminosalicylic acid. Furthermore, the present invention provides a process for preparing these compounds and their use for treating IBD and IBS and the prevention/treatment of colon cancer.