FeCl3 · 6H2O-Catalyzed Acceleration of the Acylation of Sodium Azide withN-Acylbenzotriazoles
摘要:
[image omitted] Catalyzed by ferric chloride hexahydrate (FeCl3 center dot 6H2O), the acylation of sodium azide with N-acylbenzotriazoles was greatly accelerated in a mixed solvent of acetone and water. Thus, good to excellent yields of a variety of acyl azides were obtained at room temperature in a short time. Furthermore, because of the complete conversion of N-acylbenzotriazoles and the easy removal of the by-product, purification by column chromatography was no longer required, which made the protocol suitable for large-scale preparation.
N-Aryl and N-alkenyl carbamoyl benzotriazoles were prepared in good to excellent yields from acyl azides and benzotri-azole via Curtiusrearrangement, while N-alkylcarbamoyl benzotriazoles were formed from N-alkanoyl benzotriazoles and sodium azide in one pot. The carbamoyl benzotriazoles can be used as a stable isocyanate alternative, as has been demonstrated by its reaction with amines to synthesize
Simple and facile method for the preparation of vinyl azides
作者:Vikas N. Telvekar、Balaram S. Takale、Harshal M. Bachhav
DOI:10.1016/j.tetlet.2009.06.097
日期:2009.9
A synthetic utility of [bis(trifluoroacetoxy)iodo]benzene on α,β-unsaturated carboxylicacid is described. This is the first example of preparation of vinyl azide using α,β-unsaturated carboxylicacids directly by using hypervalent iodine reagent. The advantage of this protocol is characterized with non-toxicity of starting material and shorter reaction times to obtain good preparative yields. The
Sulfonic acid or sulfonylamino N-(heteroaralkyl)-azaheterocyclylamide compounds
申请人:——
公开号:US20020013310A1
公开(公告)日:2002-01-31
The compounds of formula I herein exhibit useful pharmacological activity and accordingly are incorporated into pharmaceutical compositions and used in the treatment of patients suffering from certain medical disorders. More specifically, they are inhibitors of the activity of Factor Xa. The present invention is directed to compounds of formula I, compositions containing compounds of formula I, and their use, for treating a patient suffering from, or subject to, a physiological condition which can be ameliorated by the administration of an inhibitor of the activity of Factor Xa.
The compounds of formula I herein exhibit useful pharmacological activity and accordingly are incorporated into pharmaceutical compositions and used in the treatment of patients suffering from certain medical disorders. More specifically, they are inhibitors of the activity of Factor Xa. The present invention is directed to compounds of formula I, compositions containing compounds of formula I, and their use, for treating a patient suffering from, or subject to, a physiological condition which can be ameliorated by the administration of an inhibitor of the activity of Factor Xa.
Pyridines and pyridine N-oxides as modulators of thrombin
申请人:Janssen Pharmaceutica NV
公开号:US07829584B2
公开(公告)日:2010-11-09
The present invention describes compounds of Formula I:
wherein W, X, Y, Z, and Q are defined herein, or a pharmaceutically acceptable salt thereof, for the prophylaxis, or treatment of diseases and conditions related to thrombin activity in a mammal.