نتایج جستجو برای: methyl ketones

تعداد نتایج: 117877  

Journal: :Organic & biomolecular chemistry 2015
William J Kerr David M Lindsay Vipulkumar K Patel Muralikrishnan Rajamanickam

Efficient conversion of ketones into kinetic enol phosphates under mild and accessible conditions has been realised using the developed methods with di-tert-butylmagnesium and bismesitylmagnesium. Optimisation of the quench protocol resulted in high yields of enol phosphates from a range of cyclohexanones and aryl methyl ketones, with tolerance of a range of additional functional units.

2001
Bharat R. Lagu Heidi M. Crane Dennis C. Liotta

Diastereoselective aldol additions have emerged as one of the most efficient and versatile methods available for preparing a wide range of optically active compounds.l Very high diastereoselectivities have been reported for aldol reactiona involving chiral enolates derived from a-ethylor higher alkyl-substituted ketone derivatives. By contrast, relatively few examples of highly diastereoselecti...

Journal: :Molecules 2012
Dejan Vražič Marjan Jereb Kenneth K Laali Stojan Stavber

The Brønsted-acidic ionic liquid 1-methyl-3-(4-sulfobutyl)imidazolium triflate [BMIM(SO(3)H)][OTf] was demonstrated to act efficiently as solvent and catalyst for the halogenation of activated organic compounds with N-halosuccinimides (NXS) under mild conditions with short reaction times. Methyl aryl ketones were converted into α-halo and α,α-dihaloketones, depending on the quantity of NXS used...

Journal: :Journal of Lipid Research 1963

Abdol Hajipour Amin Zarei, Leila Khazdooz, Nafisehsadat Sheikhan

An efficient, mild and environmentally friendly method was developed for the Strecker reaction to synthesize α-aminonitriles in the presence of methyl imidazolium hydrogen sulfate ([Hmim][HSO4]) as an efficient catalyst. These syntheses were performed via a one-pot three-component condensation of aldehydes (or ketones), amines, and trimethylsilyl cyanide under mild and solvent free c...

Abdol Hajipour Amin Zarei, Leila Khazdooz, Nafisehsadat Sheikhan

An efficient, mild and environmentally friendly method was developed for the Strecker reaction to synthesize α-aminonitriles in the presence of methyl imidazolium hydrogen sulfate ([Hmim][HSO4]) as an efficient catalyst. These syntheses were performed via a one-pot three-component condensation of aldehydes (or ketones), amines, and trimethylsilyl cyanide under mild and solvent free c...

Journal: :Physical chemistry chemical physics : PCCP 2014
Jihad Badra Ahmed E Elwardany Aamir Farooq

Reaction rate constants of the reaction of four large ketones with hydroxyl (OH) are investigated behind reflected shock waves using OH laser absorption. The studied ketones are isomers of hexanone and include 2-hexanone, 3-hexanone, 3-methyl-2-pentanone, and 4-methl-2-pentanone. Rate constants are measured under pseudo-first-order kinetics at temperatures ranging from 866 K to 1375 K and press...

Journal: :Applied and environmental microbiology 2013
Jana Müller Daniel MacEachran Helcio Burd Noppadon Sathitsuksanoh Changhao Bi Yi-Chun Yeh Taek Soon Lee Nathan J Hillson Swapnil R Chhabra Steven W Singer Harry R Beller

Ralstonia eutropha is a facultatively chemolithoautotrophic bacterium able to grow with organic substrates or H2 and CO2 under aerobic conditions. Under conditions of nutrient imbalance, R. eutropha produces copious amounts of poly[(R)-3-hydroxybutyrate] (PHB). Its ability to utilize CO2 as a sole carbon source renders it an interesting new candidate host for the production of renewable liquid ...

Journal: :Chemical communications 2015
Zhe Zhou Patrick M Walleser Marcus A Tius

Oxidation of α,β-unsaturated methyl ketones with selenium dioxide leads to a cascade of reactions culminating in the formation of isotetronic acids.

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