A new and efficient method for the synthesis of amides via palladium-catalyzed C−C coupling of arylhalides with isocyanides is reported, by which a series of amides were formed from readily available starting materials under mild conditions. This transformation could extend its use to the synthesis of natural products and significant pharmaceuticals.
Amidation of Aryl Halides with Isocyanides Using a Polymer-Supported Palladium–N-Heterocyclic Carbene Complex as an Efficient, Phosphine-Free and Heterogeneous Recyclable Catalyst
作者:Bhalchandra Bhanage、Bhikan Khairnar
DOI:10.1055/s-0033-1340733
日期:——
simple filtration process and recycled further for up to four consecutive recycle without any loss of activity and selectivity. The protocol is advantageous due to the ease in handling of the catalyst, simple workup procedure, phosphine-free, and effective catalyst recyclability. The amidation of arylhalides with alkyl/aryl isocyanides to give the corresponding amides using polymer-supported palladium–N-heterocyclic
Quinoxalinyl macrocyclic hepatitis C serine protease inhibitors
申请人:Nakajima Suanne
公开号:US20070060510A1
公开(公告)日:2007-03-15
The present invention relates to compounds of Formula I or II, or a pharmaceutically acceptable salt, ester, or prodrug, thereof:
which inhibit serine protease activity, particularly the activity of hepatitis C virus (HCV) NS3-NS4A protease. Consequently, the compounds of the present invention interfere with the life cycle of the hepatitis C virus and are also useful as antiviral agents. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HCV infection. The invention also relates to methods of treating an HCV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention.
A compound of the formula:
wherein
Ar is optionally substituted phenyl, etc. ; n is 0, 1 or 2;
R1 is hydogen atom, optionally substituted alkyl, etc. ; R2 and R3 are independently optionally substituted alkyl, etc. ;
R4 and R5 are independently hydrogen atom or optionally substituted alkyl; R6 is hydrogen atom, hydroxy or alkyl;
or a pharmaceutically acceptable salt thereof is useful as a medicament for treating retinal degenerative disorders and the like.