Iron-catalysed 1,2-acyl migration of tertiary α-azido ketones and 2-azido-1,3-dicarbonyl compounds
作者:Tonghao Yang、Yajun Lin、Chaoqun Yang、Wei Yu
DOI:10.1039/c9gc02085c
日期:——
Iron-catalysed 1,2-acyl migration of tertiary α-azido ketones and 2-azido-1,3-dicarbonyl compounds provides a simple and atom-economical approach toward enamides and isoquinolones. This paper reports two catalyst systems for these transformations which employ iron(II) complexes [Fe(dpbz)]Br2 (dpbz = 1,2-bis(diphenylphosphino)benzene) and FeBr2/Et3N, respectively. [Fe(dpbz)]Br2 was found to be highly
铁催化的α-叠氮基酮和2-叠氮基-1,3-二羰基化合物的1,2-酰基迁移为酰胺和异喹啉酮提供了一种简单且原子经济的方法。本文报道两种催化剂体系用于这些转化其采用铁(II)配合物的[Fe(dpbz)]溴2(dpbz = 1,2-双(二苯基膦基)苯)和FeBr 2 / ET 3 N,分别。发现[Fe(dpbz)] Br 2在将2-叠氮基-2,3-二氢-1 H-茚满-1-酮转化为异喹诺酮方面非常有效。另一方面,由于Et 3的有益作用,FeBr 2 / Et 3 N的试剂组合具有更宽的催化范围N.后一种催化剂体系可使2-叠氮基-2-甲基-1,3-二羰基化合物在温和条件下以良好的收率转化为相应的酰胺。
[EN] PYRAZOLONE DERIVATIVES AS NITROXYL DONORS<br/>[FR] DÉRIVÉS DE PYRAZOLONE UTILISÉS EN TANT QUE DONNEURS DE NITROXYLE
申请人:CARDIOXYL PHARMACEUTICALS INC
公开号:WO2015183839A1
公开(公告)日:2015-12-03
The disclosed subject matter provides pyrazolone derivative compounds, pharmaceutical compositions comprising such compounds, kits comprising such compounds, and methods of using such compounds or pharmaceutical compositions. In particular, the disclosed subject matter provides methods of using such compounds or pharmaceutical compositions for treating heart failure.
Antimicrobial thiadiazinone derivatives and their application for treatment of bacterial infections
申请人:——
公开号:US20040014746A1
公开(公告)日:2004-01-22
The present invention provides certain thiadiazinone derivatives of oxazolidinones of the following formula I:
1
or pharmaceutically acceptable salts thereof that are antibacterial agents, pharmaceutical compositions containing them, methods for their use, and methods for preparing these compounds.
has been developed from the cyclization of 2‐propynyl‐1,3‐dicarbonyl compoundscatalyzed by potassium tert‐butoxide, copper(II) trifluoromethanesulfonate and triphenylphosphine using methanol/dichloromethane as the solvent under very mild conditions. Moreover, dihydrofurans could be easily transformed into the corresponding furans in the presence of trifluoroacetic acid.
Described herein is a facile and efficient methodology toward the synthesis of Morusin scaffolds and Morusignin L scaffolds 4-9 and 12via a novel three-step approach (Michael addition or prenylation, cyclization and cyclization) and use a rapid, microwave-accelerated cyclization as the key step. Furthermore, their biological activities have been preliminarily demonstrated by in vitro evaluation for