Thionation with the Reagent Combination of Phosphorus Pentasulfide and Hexamethyldisiloxane
作者:Thomas J. Curphey
DOI:10.1021/jo0256742
日期:2002.9.1
The combination of P4S10 and hexamethyldisiloxane efficiently converts esters, lactones, amides, lactams, and ketones to their corresponding thiono derivatives. In the presence of elemental sulfur, 3-oxoesters are converted to dithiolethiones by this reagent. Yields are comparable to or superior to those obtained with Lawesson's reagent. The method has the advantage that reagent-derived byproducts
Trimethylsilyl Chloride Promoted Selective Desulfurization of Thiocarbonyls to Carbonyls with Hydrogen Peroxide
作者:Kiumars Bahrami、Mohammad Khodaei、Maryam Tajik
DOI:10.1055/s-0030-1258283
日期:2010.12
In the presence of hydrogen peroxide and trimethylsilyl chloride, thiocarbonyls desulfurize to the corresponding carbonyls. The safe, operationally simple, general reaction gives excellent yields in short reaction times with no side reactions and excellent regioselectivity, which makes this process an attractive, environmentally benign alternative for the desulfurization of thiocarbonyls. protecting
A Convenient and Inexpensive Method for Conversion of Thiocarbonyl Compounds to Their Oxo Derivatives Using Oxone Under Solvent-Free Conditions
作者:Iraj Mohammadpoor-Baltork、Majid M. Sadeghi、Karim Esmayilpour
DOI:10.1081/scc-120016359
日期:2003.1.4
Abstract A series of thioamides, thioureas and thioesters are transformed to their corresponding carbonyl compounds in good to excellent yields with oxone under solid phase conditions, while thioketones remained unchanged under these conditions.
[EN] HETEROAROMATIC DERIVATIVES AND PHARMACEUTICAL APPLICATIONS THEREOF<br/>[FR] DÉRIVÉS HÉTÉROAROMATIQUES ET LEURS APPLICATIONS PHARMACEUTIQUES
申请人:SUNSHINE LAKE PHARMA CO LTD
公开号:WO2015161830A1
公开(公告)日:2015-10-29
Provided herein are novel heteroaromatic derivatives, or a stereoisomer, a geometric isomer, a tautomer, an N-oxide, a hydrate, a solvate, a prodrug, a pharmaceutically acceptable salt or a prodrug thereof, and pharmaceutical compositions containing such compounds. Also provided herein are uses of such compounds or pharmaceutical compositions thereof in the manufacture of a medicament for treating respiratory diseases, especially chronic obstructive pulmonary disease (COPD).
A reaction sequence leading to the new title compounds is described, the key step of which is the treatment of anions of N-arylmethyl(2-chloropyridyl) methylidene amines with aromatic and heteroaromatic O-ethyl thiocarboxylates.