The present invention provides oxalic amide ligands and uses thereof in copper-catalyzed coupling reaction of aryl halides. Specifically, the present invention provides a use of a compound represented by formula I, wherein definitions of each group are described in the specification. The compound represented by formula I can be used as a ligand in copper-catalyzed coupling reaction of aryl halides for the formation of CN, CO and CS bonds. ##STR00001##

Novel selective synthesis route to introduce primary alkyl groups on aromatic compounds is disclosed. The synthesis route is based on electrophilic aromatic substitutions of thionium ion species that are generated in-situ from aldehydes and thiols, affording benzyl sulfide that can be reduced with triethylsilane.

Novel selective synthesis route to introduce primary alkyl groups on aromatic compounds is disclosed. The synthesis route is based on electrophilic aromatic substitutions of thionium ion species that are generated in-situ from aldehydes and thiols, affording benzyl sulfide that can be reduced with triethylsilane.

The present invention provides a method for improved preparation of Sugammadex sodium.

The present invention provides a method for improved preparation of Sugammadex sodium.

The present invention provides a method for improved preparation of Sugammadex sodium.

The present invention provides a method for improved preparation of Sugammadex sodium.

Novel thioalkylcarboxylate-modified CDs and pharmaceutical compositions comprising these thioalkylcarboxylate-modified CDs are disclosed, as well as methods of using the disclosed thioalkylcarboxylate-modified CDs and pharmaceutical compositions thereof to neutralize or reduce undesired effects or symptoms associated with one or more fentanyl related compounds in a subject in need thereof. The use of the disclosed thioalkylcarboxylate-modified CDs to detect the presence of one or more fentanyl related compounds in a sample is also disclosed, which comprises contacting the sample with said thioalkylcarboxylate-modified CDs or a composition comprising these CDs.

A method for synthesizing dissymmetric sulfoether includes the following step: a) under the condition of tetrabutylammonium halide catalysis, compounds having a structure of formula (I), compounds having a structure of formula (II) and salts having sulfur and oxygen are reacted in a solvent to give dissymmetric sulfoether having a structure of formula (III).

A method for synthesizing dissymmetric sulfoether includes the following step: a) under the condition of tetrabutylammonium halide catalysis, compounds having a structure of formula (I), compounds having a structure of formula (II) and salts having sulfur and oxygen are reacted in a solvent to give dissymmetric sulfoether having a structure of formula (III).