Table 19.Synthesis of thiiranes from α-haloketones and HSP(S)(OEt)2and NaBH4–Al2O3under microwave irradiation KetoneProductReaction time (min)trans:cis ratioYield (%) Reaction of di-t-butylketene356with Lawesson’s reagent atroom temperatureindichloromethanefor 12h give 3,3-di-t-butylthiiran...
Novel alpha-haloketones (I) have formula: R-CO-C(X)(Y)-Z (where R is 1-4C alkyl opt. partly or wholly substd. by halogen, or aryl opt. substd. by halogen, NO2, OH, 1-4C alkyl, 1-4C alkoxy or 1-4C alkyl opt. substd. partly or wholly by halogen), X is halogen, Y ...
Bis(triphenylstannyl) selenide (2) and bis(terr-butyldimethylsilyl) telluride (3) are two new reagents which in the presence of fluoride ion and under mild conditions, effectively promote the dehalogenation of alpha-halo ketones. [References: 48] 机译:双(三苯基锡烷基)硒化物(2)和双(叔丁...
Reformatsky-type reaction of #alpha#-haloketones promoted by titanium tetraiodide 来自 掌桥科研 喜欢 0 阅读量: 3 作者:M Shimizu,F Kobayashi,R Hayakawa 摘要: Titanium(IV) tetraiodide induces a Reformatsky-type reaction of #alpha#-iodoketones with carbonyl compounds to give #beta#-hydroxy ketones...
ALPHA-HALO KETONESMALONATE ANIONREACTIVITY3-Bromo-2,2,6,6-tetramethyl-4-oxopiperidine-1-oxyl was reacted with several C-nucleophiles to give novel ... AS Babic - 《Synlett》 被引量: 0发表: 2008年 Favorskii rearrangements of .alpha.-halogenated acetylcycloalkanes. 3 ALPHA-HALO KETONESMALONATE ...
A Position-Specific Introduction of α, β-Unsaturation into Unsymmetrical Ketones, " (1973) J. Org. Chem. 38:2576-2578.Stotter, P.L. et al.,." alpha-halocarbonyl compounds. II. A position-specific preparation of alpha-bromo ketones by bromination of lithium enolates. A position-specific...
The present invention provides methods and processes for producing α-fluoroalkyl ketones from non-fluoro α-haloalkyl ketones using a fluorohydrogenate compound. In some embodiments, the fluorohydrogenate compound is an ionic liquid. One particular method of the invention utilizes a fluorohydrogenate...
United States Patent US4764642 Note: If you have problems viewing the PDF, please make sure you have the latest version ofAdobe Acrobat. Back to full text
The mechanism of amine-catalyzed halohydrin formation from .alpha.-chloro ketones and phosphonate diesters We cloned the genes from Corynebacterium sp. strain N-1074, for two halohydrin hydrogen-halide-lyase isoenzymes (hheA and hheB), which are involved in the ... B Springs,P Haake - 《Jo...
By the haloform reaction of hindered acetyl compounds, we obtained only halogenated ketones, which it was difficult to hydrolyze to give carboxylic acids. After the structures of these products had been determined and compared, it became... Y Kawase,M Takashima - 《Bull.chem.soc.jpn》 被引量...