Copper(I)-Catalyzed Intramolecular Addition of N-Chloroamines to Double Bonds under Aprotic Conditions. Towards a Stereoselective Catalytic Radical Reaction
作者:Richard Göttlich
DOI:10.1055/s-2000-7605
日期:——
Copper(I) complexes catalyze the intramolecular addition of N-chloramines to carbon-carbon double bonds under neutral conditions, a reaction that proceeds via a metal complexed aminyl radical. A high diastereoselectivity is obtained in the cyclization step due to the sterically demanding copper complex.
One-Pot Synthesis of 3-Azido- and 3-Aminopiperidines by Intramolecular Cyclization of Unsaturated Amines
作者:Gerardo X. Ortiz、Bora Kang、Qiu Wang
DOI:10.1021/jo4022666
日期:2014.1.17
A highly efficient one-pot synthesis of 3-azidopiperidines has been achieved by an intramolecularcyclization of unsaturated amines that allows for the nucleophilic installation of an azide moiety. This method unlocks the versatile employment of the azide functionality in the preparation and biological studies of piperidine-containing structures. This strategy has been expanded for the direct incorporation
Transition metal-free iodine-promoted haloamination of unfunctionalized olefins
作者:Wei Li、Gong-Qing Liu、Bin Cui、Li Zhang、Ting-Ting Li、Lin Li、Lili Duan、Yue-Ming Li
DOI:10.1039/c4ra00383g
日期:——
A transition metal-free route to 3-halopiperidines and 2-halomethylpiperidines was described. In the presence of iodine, potassium persulfate and a suitable halogen source, intramolecular haloamination of 4-penten-1-amines and 5-hexen-1-amines proceeded readily, leading to the corresponding substituted piperidines in good isolated yields.
Benzimidazole derivatives and their use as a medicament
申请人:Poitout Lydie
公开号:US20090170922A1
公开(公告)日:2009-07-02
A subject of the present application is new benzimidazole derivatives of formula
in which A, Y, R
1
, R
2
, R
3
and R
4
represent different variable groups. These products have an antagonist activity of GnRH (Gonadotropin-Releasing Hormone). The invention also relates to pharmaceutical compositions containing said products and their use for the preparation of a medicament.