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Enolizable Ketones (enolizable + ketone)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

ChemInform Abstract: Dual Palladium- and Proline-Catalyzed Allylic Alkylation of Enolizable Ketones and Aldehydes with Allylic Alcohols.

CHEMINFORM, Issue 31 2009
Ippei Usui
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 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]

Bromodimethylsulfonium Bromide Catalyzed Three-Component Mannich-Type Reactions

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 5 2008
Abu T. Khan
Abstract Bromodimethylsulfonium bromide catalyzes Mannich-type reactions of a variety of aldimines, generated in situ from aldehydes and anilines, with enolizable ketones or diethyl malonate in three-component reactions to afford the corresponding ,-amino carbonyl compounds. The salient features of this protocol are: shorter reaction times, simplicity of the procedure, good to excellent yields, avoidance of aqueous workup and column-chromatographic separations, and high stereoselectivities.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) [source]

Pentafluorophenylammonium Trifluoromethanesulfonimide: Mild, Powerful, and Robust Catalyst for Mukaiyama Aldol and Mannich Reactions between Ketene Silyl Acetals and Ketones or Oxime Ethers

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 7 2010
Ryohei Nagase
Abstract Pentafluorophenylammonium trifluoromethanesulfonimide (C6F5N+H3,NTf2,) promotes Mukaiyama aldol and Mannich reactions using ketene silyl acetals with ketones and oxime ethers, respectively. The present robust method is mild, but powerful enough to utilize less accessible electrophiles such as enolizable ketones and oxime ethers to produce a variety of ,-hydroxy esters and ,-alkoxyamino esters, respectively. Mechanistic investigation revealed in situ generation of trimethylsilyl bistriflimide [Tf2N(TMS)], the truly active catalyst, which was supported by rational 1H,NMR measurements. [source]

ChemInform Abstract: Gold-Catalyzed Dealkoxylative Carbocyclization/[3 + 3] Annulation Cascade of Acetal,Allene or Ketal,Allene Substrates.

CHEMINFORM, Issue 37 2010
Tse-Min Teng
Abstract Acetal-allene or ketal-allene compounds undergo the title cascade reaction with 2-substituted allylsilanes, a phenol, or enolizable ketones to give a wide variety of tri- and tetracyclic carbocycles as well as oxapolycyclic compounds with good stereocontrol in general. [source]

Zinc Hydrogensulfate as an Efficient Catalyst for Preparation of , -Amido Carbonyl Compounds

CHINESE JOURNAL OF CHEMISTRY, Issue 10 2009
Hamid Reza Shaterian
Abstract A one-pot and efficient three-component condensation of benzaldehyde derivatives, enolizable ketones or ketoesters, acetyl chloride, and acetonitrile or benzonitrile under ambient conditions in the presence of zinc hydrogensulfate for the synthesis of , -amido carbonyl compounds is described. The simple experimental procedure, high to excellent yields of products and preparation of diastereoselective , -acetamido ketoesters are strong features of the presented method. [source]