Treatment of phenols or anilines containing a sulfonyl group in the presence of a hypervalent iodine reagent promotes a formal dearomatizing [2 + 3] cycloaddition reaction on unactivated benzene and naphthalene derivatives. This process occurs via an intramolecular nucleophilic addition to the Wheland species generated during the oxidative activation. Subsequent treatment under acidic conditions readily transforms the tricyclic system into a biaryl via a formal cross-coupling process.
Reactions of Aryliminotriphenylphosphoranes with Sulfenes
作者:Takayuki Kawashima、Naoki Inamoto
DOI:10.1246/bcsj.47.2444
日期:1974.10
Aryliminotriphenylphosphoranes reacted with methanesulfonyl, ethanesulfonyl and α-toluenesulfonyl chlorides in the presence of triethylamine to give 1 : 2 adducts [α-(N-alkanesulfonyl-N-arylsulfamoyl)alkylidenephosphoranes] and the decomposition products, instead of 1 : 1 adducts [α-(N-arylsulfamoyl)alkylidenephosphoranes). They were obtained under ice-cooling, the structure being of betaine type.
A cautionary comment on a recent communication entitled “A measure of charge transfer (ϱ) versus a measure of bond tightness (ϱij) in the transition state”
作者:J.P. King、S. Skonieczny
DOI:10.1016/s0040-4039(00)96680-2
日期:1987.1
We present evidence that the reaction of anilines with ArCH2SO2Cl and ArCH2SO2F goes mainly via the sulfene (ArCHSO2) and is not a simple nucleophilic displacement at sulfur, as was assumed in the above paper by I. Lee and R.K. Kang (Tetrahedron Lett. 28, 1183 (1987)), and hence that their conclusions about the interpretation of ϱ and ϱXY values are unfounded.
我们目前的证据,与拱苯胺的反应2 SO 2 Cl和ARCH 2 SO 2 ˚F主要变为经由亚磺酰(ArCHSO 2),而不是在硫简单的亲核置换,如假定在上述纸张通过我。Lee和RK康(四面体通讯28,1183(1987)),因此,他们的约ρ和ρ的解释结论XY值是没有根据的。
Methods for treating Hepatitis C
申请人:Karp Mitchell Gary
公开号:US20080096928A9
公开(公告)日:2008-04-24
In accordance with the present invention, compounds that inhibit viral replication, preferably Hepatitis C Virus (HCV) replication, have been identified, and methods for their use provided. In one aspect of the invention, compounds useful in the treatment or prevention of a viral infection are provided. In another aspect of the invention, compounds useful in the treatment or prevention of HCV infection are provided.
The present invention provides compounds, pharmaceutical compositions, and methods of using such compounds or compositions for treating infection by a virus, or for affecting viral IBES activity.