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Diazo Ketones (diazo + ketone)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Photochemical Reactions of Regioisomeric 2,2-Dimethyl-5,5-diphenyl- and 5,5-Dimethyl-2,2-diphenyl-Substituted Diazo Ketones of a Tetrahydrofuran Series

HELVETICA CHIMICA ACTA, Issue 10 2009
Ludmila
Abstract The principal direction of conventional photolysis of the regioisomeric 2,2-dimethyl-5,5-diphenyl- and 5,5-dimethyl-2,2-diphenyl-substituted 4-diazodihydrofuran-3(2H)-ones 1a and 1b, respectively, is the Wolff rearrangement, while other photochemical processes, which are giving rise to the formation of CH-insertion, 1,2-alkyl- or -aryl-shifts, as well as H-atom-abstraction products occur to a much lower degree (Schemes,2 and 3). The ratio of similar reaction products from both regioisomers 1a and 1b is essentially independent of their structure, and a substantial effect of the relative position of the Ph and diazo group to each other on the yield of CH-insertion products does not occur. Based on stereochemical considerations, the Wolff rearrangement of diazodihydrofuran-3(2H)-ones apparently proceeds in a concerted manner, whereas the appearance in the reaction mixture of 1,2-shift and H-atom-abstraction products points to the parallel generation during photolysis of singlet and triplet carbenes (Schemes,4 and 5). [source]

ChemInform Abstract: Alkynes as Equivalents of ,-Diazo Ketones in Generating ,-Oxo Metal Carbenes: A Gold-Catalyzed Expedient Synthesis of Dihydrofuran-3-ones.

CHEMINFORM, Issue 31 2010
Longwu Ye
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]

Regioselective Synthesis of Mono- and Bis-decahydrobenzocarbazoles via Tandem Reactions of ,-Diazo Ketones.

CHEMINFORM, Issue 49 2004
Sengodagounder Muthusamy
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Ruthenium(II) Porphyrin Catalyzed Tandem Carbonyl Ylide Formation and 1,3-Dipolar Cycloaddition Reactions of ,-Diazo Ketones.

CHEMINFORM, Issue 4 2003
Cong-Ying Zhou
Abstract For Abstract see ChemInform Abstract in Full Text. [source]