The invention provides novel nucleoside compounds of formula I wherein R
1
, R
2a
, R
2b
, R
3
, R
4
, R
5
, R
6
, R
8a
, R
9
and R
10
are as defined herein which are useful for the treatment of Hepatitis C Virus (HCV) mediated diseases. The invention further provides methods for treatment or prophylaxis of HCV mediated diseases with compounds of formula I and pharmaceutical compositions comprising these compounds,
Sulfonyl transfer mechanism in C–S coupling of phenylmagnesium bromide with phenyl arenesulfonates
作者:Fatma Eroğlu、Didem Kâhya、Ender Erdik
DOI:10.1016/j.jorganchem.2009.09.044
日期:2010.1
The kinetics of C–S coupling of phenylmagnesiumbromide with phenyl arenesulfonates has been studied in THF:toluene (7:10) at 90 °C. Kinetic data and Hammett relationship are consistent with an asynchronous SNa mechanism in which rate determining thiophilic attack of carbanion takes place much ahead of phenoxy group departure.
SuFEx Reactions of Sulfonyl Fluorides, Fluorosulfates, and Sulfamoyl Fluorides Catalyzed by N-Heterocyclic Carbenes
作者:Muze Lin、Jinyun Luo、Yu Xie、Guangfen Du、Zhihua Cai、Bin Dai、Lin He
DOI:10.1021/acscatal.3c03820
日期:2023.11.17
Sulfur(VI) fluorideexchange (SuFEx) click chemistry provides a powerful tool for the rapid assembly of modular connections. Herein, we report an organocatalytic SuFEx reaction of sulfonyl fluorides, fluorosulfates, and sulfamoyl fluorides. Under the catalysis of 10 mol % N-heterocyclic carbene (NHC), or under the relay catalysis of NHC and HOBt, different SuFExable hubs efficiently undergo click reactions
Method for immunological analysis of trace components
申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP0015518A1
公开(公告)日:1980-09-17
In a method for the immunological analysis of trace components by marking or labelling an antigen or antibody with a marker, an immune reaction is caused using an antigen or antibody marked with a fogging agent for silver halide, the labelled antigen or antibody is separated from the labelled antigen-antibody reaction product, the silver halide is developed in the presence of either one of the labelled antigen or antibody and the labelled antigen-antibody reaction product, and the density obtained is measured.
The method is comparable to radioimmunoassay in having high reproductibility and sufficient sensitivity but does not involve any risk due to radiation.
Method for immunological analysis of a trace component(s) by labelling an antigen or antibody with a marker comprising causing an immune reaction using an antigen or antibody labelled with a spectral sensitizer as a marker, separating the labelled antigen or antibody from the resulting antigen-antibody reaction product, then bringing either the labelled antigen or antibody,and the labelled antigen-antibody reaction product into contact with a-silver halide, exposing the resulting system to light having a wavelength which the spectral sensitizer absorbs, developing the thus exposed silver halide and then measuring the resulting density.
Trace components can thus be photochemically detected and the amount present quantitatively determined. The method provides high reproducibility and high sensitivity comparable to radioimmunoassay but without any risk of radiation exposure.