Development of efficient new methodology for generation, cyclization and functional trapping of iminyl and amidyl radicals
摘要:
New methodology has been devised for the generation and subsequent cyclization of iminyl and amidyl radicals under mild conditions. The process involves either the treatment of oximes with 2,6-dimethylbenzenesulfinyl chloride, or the treatment of hydroxamic acids with tert-butylsulfinyl chloride (-50 degreesC to rt), to give the corresponding nitrogen radicals, followed by cyclization onto pendant olefins. Radical traps such as diphenyl diselenide, diphenyl disulfide, and TEMPO can be used to terminate the cyclizations, thus introducing functionality that provides multiple options for further manipulation. In a more convenient procedure, both iminyl and amidyl radical cyclizations can be initiated using commercially available diethyl chlorophosphite which generally provides similar (with diphenyl disulfide and TEMPO) or significantly higher (with diphenyl diselenide) yields of products. (C) 2001 Elsevier Science Ltd. All rights reserved.
A New Method for the Generation and Cyclization of Iminyl Radicals via the Hudson Reaction
作者:Xichen Lin、Didier Stien、Steven M. Weinreb
DOI:10.1021/ol990720e
日期:1999.8.1
[formula: see text] A mild new synthetic procedure has been developed for in situ generation and cyclization of iminylradicals onto pendant alkenes, followed by functionalization of the resulting carbon radical by one of a variety of trapping reagents. The key process in the method involves production of the iminylradical via treatment of an aldoxime or ketoxime with readily available 2,6-dimethylbenzenesulfinyl
THE SOLVOLYSIS OF ARENESULFINATES, SULFUR–OXYGEN VERSUS CARBON–OXYGEN BOND FISSION
作者:David Darwish、John Noreyko
DOI:10.1139/v65-185
日期:1965.5.1
The base-catalyzed solvolysis of p-methoxyneophyl benzenesulfinate and the corresponding 2,6-dimethyl-, 2-methyl-, 4-methyl-, and 2-chloro-benzenesulfinates has been studied in ethanol and aqueous ethanol. The reactions involve sulfur–oxygen bond fission. The rate of sulfur–oxygen bond fission is decreased by the introduction of two methyl groups ortho to the sulfur. The rate decrease may be partly
Chemical polymerization initiator, adhesive composition, adhesive composition kit, dental material, dental material kit, and method of storing adhesive composition
申请人:TOKUYAMA DENTAL CORPORATION
公开号:US11325993B2
公开(公告)日:2022-05-10
Provided are a chemical polymerization initiator including (a) a thiourea compound, (b) a peroxyester, (c) a divalent copper compound, and (d) an aryl borate compound, an adhesive composition, an adhesive composition kit, a dental material, and a dental material kit each using the chemical polymerization initiator, and a method of storing the adhesive composition.
PROCESS FOR THE SULFINYLATION OF A PYRAZOLE DERIVATIVE
申请人:BASF SE
公开号:EP2081909B1
公开(公告)日:2013-01-09
CHEMICAL POLYMERIZATION INITIATOR, ADHESIVE COMPOSITION, ADHESIVE COMPOSITION KIT, DENTAL MATERIAL, DENTAL MATERIAL KIT, AND METHOD FOR STORING ADHESIVE COMPOSITION