ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
ChemInform Abstract Bei der Behandlung mit Trimethylsilyliodid in Gegenwart von Hexamethyldisilaz... more ChemInform Abstract Bei der Behandlung mit Trimethylsilyliodid in Gegenwart von Hexamethyldisilazan erhält man aus Acetalen und Ketalen die entsprechenden Enolether wie im Formelschema wiedergeben, wobei z.Tl. auch Isomere wie (XI) und (XII) gebildet werden. us (XV) entstehen die Iodverbindungen (XVI).
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
Abstract Halogenated alkynols react with N-halosuccinimides and catalytic amounts of Koser's ... more Abstract Halogenated alkynols react with N-halosuccinimides and catalytic amounts of Koser's reagent to afford mixed β,β-dihaloenones, useful templates for aryl and alkyl substituted enones.
www.cheminform.wiley-vch.de Amino acids U 0400 Facile Syntheses of 3-Halo and Mixed 3,5-Dihalo An... more www.cheminform.wiley-vch.de Amino acids U 0400 Facile Syntheses of 3-Halo and Mixed 3,5-Dihalo Analogues of N-Acetyl-L-tyrosine via Sulfonic Acid-Catalyzed Regioselective Monohalogenation.-Addition of TosOH enhances the regioselectivity for monohalogenation of (I) allowing the selective preparation of 3-halo and mixed 3,5-dihalo derivatives.-(BOVONSOMBAT*,
Irradiation of o-acetylphenylacetonitriles 1a,b in methanol (lambda &... more Irradiation of o-acetylphenylacetonitriles 1a,b in methanol (lambda >280 nm) leads to essentially quantitative photohydrolysis with formation of the corresponding ketal amides 3a,b. The mechanism proposed for this novel reaction is supported by the qualitatively different photochemical behavior of 1c and by a labeling experiment with 1a-L that confirms transfer of the carbonyl oxygen atom of 1a to the amide oxygen atom of 3a.
Abstract Adamantanone is converted to a (Z)-bromoiodomethylidene homoadamantanone via a sequence ... more Abstract Adamantanone is converted to a (Z)-bromoiodomethylidene homoadamantanone via a sequence involving ethynyl Grignard addition, conversion to a bromoalkynol and treatment with iodine and [hydroxy(tosyloxy)iodo]benzene.
The bmmnetiyayl a&lucl of Ilunrcnunc was cuavencd IO 10-((Z)-bn~oi~~ethyl~ne)~~~~-9-~ by means of... more The bmmnetiyayl a&lucl of Ilunrcnunc was cuavencd IO 10-((Z)-bn~oi~~ethyl~ne)~~~~-9-~ by means of the iodonium-generating reagent. Wir ~IUI Ko&r reagent. Mixed a&dihaloenoncs represent stepping stones to a wide variety of diary1 or dialkyl enones hy means of organometallic exchanges catalyzed hy palladium comp1exes.l Lately WI: have found a facile methodology for the generation of P$-hromoiodoenones from ketones which have heen converted to hromoe-thynyl adducts. which in turn are treated with iodine and stoichiometric amounts of Koser's reagent (HTIB. [hydroxy(tosyloxy)iodo]hen7ene)* or N-iodosuccinimide and catalytic amounts of HTIB. Examples of such conversions for linear systems arc the conversion of 4-hromo-2-phenyl-3-hutyn-2-01
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
ChemInform Abstract Bei der Behandlung mit Trimethylsilyliodid in Gegenwart von Hexamethyldisilaz... more ChemInform Abstract Bei der Behandlung mit Trimethylsilyliodid in Gegenwart von Hexamethyldisilazan erhält man aus Acetalen und Ketalen die entsprechenden Enolether wie im Formelschema wiedergeben, wobei z.Tl. auch Isomere wie (XI) und (XII) gebildet werden. us (XV) entstehen die Iodverbindungen (XVI).
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more 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.
Abstract Halogenated alkynols react with N-halosuccinimides and catalytic amounts of Koser's ... more Abstract Halogenated alkynols react with N-halosuccinimides and catalytic amounts of Koser's reagent to afford mixed β,β-dihaloenones, useful templates for aryl and alkyl substituted enones.
www.cheminform.wiley-vch.de Amino acids U 0400 Facile Syntheses of 3-Halo and Mixed 3,5-Dihalo An... more www.cheminform.wiley-vch.de Amino acids U 0400 Facile Syntheses of 3-Halo and Mixed 3,5-Dihalo Analogues of N-Acetyl-L-tyrosine via Sulfonic Acid-Catalyzed Regioselective Monohalogenation.-Addition of TosOH enhances the regioselectivity for monohalogenation of (I) allowing the selective preparation of 3-halo and mixed 3,5-dihalo derivatives.-(BOVONSOMBAT*,
Irradiation of o-acetylphenylacetonitriles 1a,b in methanol (lambda &... more Irradiation of o-acetylphenylacetonitriles 1a,b in methanol (lambda >280 nm) leads to essentially quantitative photohydrolysis with formation of the corresponding ketal amides 3a,b. The mechanism proposed for this novel reaction is supported by the qualitatively different photochemical behavior of 1c and by a labeling experiment with 1a-L that confirms transfer of the carbonyl oxygen atom of 1a to the amide oxygen atom of 3a.
Abstract Adamantanone is converted to a (Z)-bromoiodomethylidene homoadamantanone via a sequence ... more Abstract Adamantanone is converted to a (Z)-bromoiodomethylidene homoadamantanone via a sequence involving ethynyl Grignard addition, conversion to a bromoalkynol and treatment with iodine and [hydroxy(tosyloxy)iodo]benzene.
The bmmnetiyayl a&lucl of Ilunrcnunc was cuavencd IO 10-((Z)-bn~oi~~ethyl~ne)~~~~-9-~ by means of... more The bmmnetiyayl a&lucl of Ilunrcnunc was cuavencd IO 10-((Z)-bn~oi~~ethyl~ne)~~~~-9-~ by means of the iodonium-generating reagent. Wir ~IUI Ko&r reagent. Mixed a&dihaloenoncs represent stepping stones to a wide variety of diary1 or dialkyl enones hy means of organometallic exchanges catalyzed hy palladium comp1exes.l Lately WI: have found a facile methodology for the generation of P$-hromoiodoenones from ketones which have heen converted to hromoe-thynyl adducts. which in turn are treated with iodine and stoichiometric amounts of Koser's reagent (HTIB. [hydroxy(tosyloxy)iodo]hen7ene)* or N-iodosuccinimide and catalytic amounts of HTIB. Examples of such conversions for linear systems arc the conversion of 4-hromo-2-phenyl-3-hutyn-2-01
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