17429-04-8Relevant academic research and scientific papers
New ketone homoenolate anion equivalents derived from (alkenyl)pentamethyl phosphoric triamides
Grison, Claude,Thomas, Antoine,Coutrot, Frédéric,Coutrot, Philippe
, p. 2101 - 2123 (2007/10/03)
Lithiated ambident anions derived from (1-alkyl-2-propenyl)- or (1-phenyl-2-propenyl)-pentamethyl phosphoric triamides undergo regioselectively γ-reaction with various alkylating reagents and isobutyraldehyde. Further hydrolysis of adducts releases the ketone under acid conditions. Number of synthetic applications clearly show the ketone homoenolate behaviour of these new carbanions.
Catalytic ring opening of acetylcyclopropane by water and alcohols under the action of copper or palladium salts
Dzhemilev,Khusnutdinov,Atnabaeva,Muslimov,Parfenova,Tomilov
, p. 1242 - 1247 (2007/10/03)
The possibility of the cleavage of the C-C bond in acetylcyclopropane (ACP) under the action of water or alcohols in the presence of copper or palladium salts was demonstrated for the first time. At 175-180 °C, the reactions proceeded regioselectively wit
Method and compounds for diagnosing coronary artery disease
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, (2008/06/13)
The present invention relates generally to methods of diagnosis, evaluation and treatment of coronary artery disease in mammals using substituted catecholamines and compounds therefore. It also relates to the preparation, use and administration of these compounds which are useful in the diagnosis, evaluation and treatment of coronary artery disease by means of a feedback controlled drug delivery system that delivers exercise simulating agents which are capable of eliciting acute responses similar to those elicited by aerobic exercise.
Hydroxyalkylation with α-Hydroperoxydiazenes. Alcohols from Olefins and Carbonyl Compounds from Enol Ethers
Osei-Twum, Emmanuel Y.,McCallion, Doug,Nazran, Avtar S.,Panicucci, Rick,Risbood, Prabhakar A.,Warkentin, John
, p. 336 - 342 (2007/10/02)
Alkyl(1-hydroxy-1-methylethyl)diazenes 2a-f were prepared in solution by autoxidation of the corresponding hydrazones of acetone.Thermolysis of the diazenes at 50-80 deg C in alkenes leads to alcohols.For example, 2b decomposes in 1,1-diphenylethene to afford 5-hydroxy-5,5-diphenylpentanenitrile.Alkenes with abstractable allylic hydrogens gave analogous products, but in very low yield.Thermolysis of a diazene 2 in an enol ether solvent leads to an aldehyde or a ketone.Thus, 2a decomposes in 1-ethoxyethene and in 2-methoxypropene to afford, respectively, 4,4,4-trifluorobutanal and 5,5,5-trifluoro-2-pentanone.Yields lie in range from 50percent to 70percent.The thermolysis of 2 in alkenes involves radical intermediates and radical chain hydroxyalkylation of alkene double bonds.In one chain-propagating step, R*, generated from 2, adds to the alkene.The adduct radical so formed propagates by inducing decomposition of 2 by attack at hydroxyl oxygen.According to this mechanism, initial products from enol ethers are hemiacetals or hemiketals which do not survive the reaction conditions but decompose to the corresponding carbonyl compounds.Preliminary evidence for this mechanism is presented.
SUPERACID CATALYZED OXYGENATION OF ALIPHATIC ETHERS WITH OZONE
Yoneda, Norihiko,Kiuchi, Takashi,Fukuhara, Tsuyoshi,Suzuki, Akira,Olah, George A.
, p. 1617 - 1618 (2007/10/02)
Electrophilic insertion of protonated ozone into tertiary or secondary C-H bonds located at γ or farther away positions from the oxygen atom in aliphatic ethers was observed to produce oxoalkyl ethers in HF-SbF5 superacid media at -40 deg C.
