949-06-4Relevant articles and documents
Catalytic Ring-Opening of Cyclic Alcohols Enabled by PCET Activation of Strong O-H Bonds
Yayla, Hatice G.,Wang, Huaiju,Tarantino, Kyle T.,Orbe, Hudson S.,Knowles, Robert R.
, p. 10794 - 10797 (2016/09/09)
We report a new photocatalytic protocol for the redox-neutral isomerization of cyclic alcohols to linear ketones via C-C bond scission. Mechanistic studies demonstrate that key alkoxy radical intermediates in this reaction are generated via the direct homolytic activation of alcohol O-H bonds in an unusual intramolecular PCET process, wherein the electron travels to a proximal radical cation in concert with proton transfer to a weak Br?nsted base. Effective bond strength considerations are shown to accurately forecast the feasibility of alkoxy radical generation with a given oxidant/base pair.
THIOPYRAN COMPOUNDS AS INHIBITORS OF MMP
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Page 45, (2010/02/05)
A compound of formula (I) in which R is lower alkyl, halogen, optionally substituted heterocyclic group or optionally substituted aryl, R is carboxy, protected carboxy or amidated carboxy, Ar is optionally substituted aryl or optionally substituted heterocyclic group, A is lower alkylene, X is oxa or a single bond, Y is thia, sulfinyl or sulfonyl, Z is methylene, thia, sulfinyl or sulfonyl, m and n are each an integer of 0 to 6, and 1/=m+n/=6, or its salt, which is useful as an inhibitor of matrix metalloproteinases (MMP) or tumor necrosis factor alpha (TNF alpha ).
Synthesis and some properties of 6-(ω-aroylbutylthio)purines
Gromov,Skachilova,Aleksandrova,Kochergin
, p. 1225 - 1229 (2007/10/03)
A series of 6-(ω-aroylthio)purines, which have not been described in the literature, has been obtained by the reaction of 6-purinethione with ω-chlorovalerophenone and its substituted derivatives. Some properties of the compounds synthesized have been studied, viz. reaction at the carbonyl group, methylation, and hydrolysis. 1999 KluwerAcademic/Plenum Publishers.