AbstractBei der Quecksilber(II)‐EDTA‐Dehydrierung der 2‐Cyclamino‐benzoesäuren 1–3 tritt nur ein Zwei‐Elektronenentzug zu den Iminiumverbindungen ein, die durch eine intramolekulare Reaktion mit der Carboxylgruppe die tricyclischen Oxazinone 4–6 ergeben. Ein Nachbargruppeneffekt der Carbonsäurefunktion, der unter doppelter Dehydrierung zur Lactamcarbonsäure führen müßte, konnte durch eine unabhängige Synthese von 7 und anschließenden dc Vergleich ausgeschlossen werden.
A General and Efficient Copper Catalyst for the Amidation of Aryl Halides
作者:Artis Klapars、Xiaohua Huang、Stephen L. Buchwald
DOI:10.1021/ja0260465
日期:2002.6.1
was developed for the amidation of arylhalides by using 0.2-10 mol % of CuI, 5-20 mol % of a 1,2-diamine ligand, and K(3)PO(4), K(2)CO(3), or Cs(2)CO(3) as base. Catalyst systems based on N,N'-dimethylethylenediamine or trans-N,N'-dimethyl-1,2-cyclohexanediamine were found to be the most active even though several other 1,2-diamine ligands could be used in the easiest cases. Aryl iodides, bromides, and
Synthesis of<i>N</i>-Aryl Pyridin-2-ones via Ligand Coupling Reactions Using Pentavalent Organobismuth Reagents
作者:Kazuhiro Ikegai、Teruaki Mukaiyama
DOI:10.1246/cl.2005.1496
日期:2005.11
An efficient method for the synthesis of N-aryl pyridin-2-ones was established by way of ligand coupling reactions using pentavalentorganobismuthreagents such as triarylbismuth dichlorides.
Synthesis of Spirocyclic Pyrazolones by Oxidative C–N Bond Formation
作者:Javier Agejas、Laura Ortega
DOI:10.1021/acs.joc.5b00796
日期:2015.6.19
The two-step synthesis of spirocyclic pyrazolone derivatives from simple and commercially available reagents is described. The unusual reaction of 1,3-dicarbonyls with hydrazines and an iodine-mediated oxidative carbon–nitrogen bond formation, joined in a two-step, one-pot reaction, allows the straightforward synthesis of these spirocycles.
The present invention provides a compound of Formula (I)
as described herein, or a pharmaceutically acceptable salt or a solvate thereof. The present invention also provides pharmaceutical compositions comprising one or more said compounds, and methods for using said compounds for treating or preventing a thromboses, embolisms, hypercoagulability or fibrotic changes.
The present invention relates to 2-oxo-piperidinyl derivatives, processes for preparing them, pharmaceutical compositions containing them and their use as pharmaceuticals.