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Silver Oxide (silver + oxide)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Palladium-Catalyzed Decarboxylative sp - sp2 Cross-Coupling Reactions of Aryl and Vinyl Halides and Triflates with ,,,-Ynoic Acids using Silver Oxide

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 17 2009
Hyunseok Kim
Abstract Palladium-catalyzed decarboxylative sp-sp2 cross-coupling reactions of aryl and vinyl halides and triflates with ,,,-ynoic acids using silver oxide have been developed. A variety of ,,,-ynoic acids were readily decarboxylated in the presence of silver oxide and then, generated in situ, silver acetylides were coupled with electrophiles in the presence of a palladium(0) catalyst under neutral conditions, producing either symmetrical or unsymmetrical diarylacetylenes, arylalkylacetylenes and arylvinylacetylenes in good to excellent yields. [source]

ChemInform Abstract: Palladium-Catalyzed Decarboxylative sp-sp2 Cross-Coupling Reactions of Aryl and Vinyl Halides and Triflates with ,,,-Ynoic Acids Using Silver Oxide.

CHEMINFORM, Issue 12 2010
Hyunseok Kim
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Palladium-Catalyzed Decarboxylative sp - sp2 Cross-Coupling Reactions of Aryl and Vinyl Halides and Triflates with ,,,-Ynoic Acids using Silver Oxide

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 17 2009
Hyunseok Kim
Abstract Palladium-catalyzed decarboxylative sp-sp2 cross-coupling reactions of aryl and vinyl halides and triflates with ,,,-ynoic acids using silver oxide have been developed. A variety of ,,,-ynoic acids were readily decarboxylated in the presence of silver oxide and then, generated in situ, silver acetylides were coupled with electrophiles in the presence of a palladium(0) catalyst under neutral conditions, producing either symmetrical or unsymmetrical diarylacetylenes, arylalkylacetylenes and arylvinylacetylenes in good to excellent yields. [source]

Asymmetric biomimetic oxidations of phenols using oxazolidines as chiral auxiliaries: the enantioselective synthesis of (+)- and (,)-dehydrodiconiferyl alcohol,

JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, Issue 8-9 2006
Maurizio Bruschi
Abstract Stereoselective bimolecular radical coupling reactions of phenylpropenoid phenols are described. Evans's 2-oxazolidinone 11a,d derivatives of ferulic acid were prepared and oxidized to give dimeric benzofuran neolignan structures 12,13a,d in 40,50% overall yields. The chiral phenols were dimerized either enzymatically with hydrogen peroxide and horseradish peroxidase (HRP) or with silver oxide. The enantioselectivity after reductive cleavage of the chiral auxiliaries to give dehydrodiconiferyl alcohol ranged from 18% to 62% enantiomeric excess. The conformational analysis and the activation energy using semiempirical PM3 calculations on the intermediate quinomethides is used to explain the observed stereoselectivity. Copyright © 2006 John Wiley & Sons, Ltd. [source]