Results 11 to 20 of about 1,019,081 (92)

Organocatalytic Michael addition–lactonisation of carboxylic acids using α,β-unsaturated trichloromethyl ketones as α,β-unsaturated ester equivalents [PDF]

open access: yes, 2014
The authors thank the Royal Society for a University Research Fellowship (ADS), The Carnegie Trust for the Universities of Scotland (LCM), Syngenta/EPSRC (Case award to DGS), GSK/EPSRC (CASE award to SRS), the EU (IEF for CS), and the European Research ...
Morrill, L.C.   +19 more
core   +1 more source

Regiospecific Organocatalytic Asymmetric Aldol Reaction of Methyl Ketones and α,β-Unsaturated Trifluoromethyl Ketones

open access: yes, 2016
The aldol reaction of methyl ketones and α,β-unsaturated trifluoromethyl ketones occurred under mild conditions with the combination of proline-derived N-sulfonylamide and trifluoroacetic acid as the catalyst to give the corresponding unsaturated α ...
Yan Zhao (58882)   +2 more
core   +3 more sources

Insights into the Mechanism and Regioselectivity of Palladium-Catalyzed Arylation of α,β-Unsaturated Ketones [PDF]

open access: yes, 2023
Transition-metal catalyzed coupling reactions of carbonyl compounds using simple chemical feedstocks have become a cornerstone of modern synthetic organic chemistry.
Xiaoxi, Su   +3 more
core   +2 more sources

A Mild Isomerization Reaction for β,γ-Unsaturated Ketone to α,β-Unsaturated Ketone

open access: yes, 2013
A series of β,γ-unsaturated ketones were isomerized to their corresponding α,β-unsaturated ketones by the introduction of DABCO in iPrOH at room temperature. The endo-cyclic double bond (β,γ-position) on ketone was rearranged to exo-cyclic double bond (α,
李世元; Lee, Adam Shih-yuan; 林美君; Lin, Mei-chun; Wang, Shu-huei; 王淑惠; Lin, Li-shin;林立信
core   +1 more source

Synthesis of β-Haloketones by β-Addition Reactions of α,β-Unsaturated Ketones with BX3 (X=Br, Cl) as Halide Source

open access: yes, 2014
A series of β-bromoketones and β-chloroketones were synthesized by the addition reactions of α,β-unsaturated ketones under BX3 (X = Br, Cl) and ethylene glycol reaction system.
Lee, Adam Shih-Yuan; Wang, Shu-Huei; Chang, Yu-Ting
core   +1 more source

)‐β‐Nitroenones into β‐Nitro‐β,γ‐Unsaturated Ketones under Microwave Conditions

open access: yes, 2020
We report herein an unprecedented conversion of β-nitroenones into β-nitro-β,γ-unsaturated ketones. The reaction proceeds under microwave irradiation, furnishing products in good yields and excellent diastereoselectivity.
Palmieri A.   +17 more
core   +1 more source

Regioselective synthesis of β-fluoro-α,β-unsaturated ketones by the reaction of β-diketones with DFMBA [PDF]

open access: yes, 2009
The deoxyfluorination reaction of β-diketones with N,N-diethyl-α,α-difluoro-m-methylbenzylamine (DFMBA) gave β-fluoro-α,β-unsaturated ketones in good yields.
Sano, Keisuke   +2 more
core   +1 more source

β′-Hydroxy-α,β-unsaturated ketones: A new pharmacophore for the design of anticancer drugs

open access: yes, 2006
A series of β′-hydroxy-α,β-unsaturated ketones were prepared by means of an iron(III) catalyzed domino process. The in vitro antiproliferative activities were examined in the human solid tumor cell lines A2780, SW1573, and WiDr. The results showed that β′
Padrón, Juan I.   +7 more
core   +1 more source

Isothiourea-mediated one-pot synthesis of trifluoromethyl substituted 2-pyrones [PDF]

open access: yes, 2014
The authors thank the Royal Society for a University Research Fellowship (ADS) and the EPSRC (EP/J018139/1, DSBD) for funding.A one-pot isothiourea-mediated Michael addition/lactonization/thiol elimination cascade sequence for the formation of 4,6 ...
Smith, Andrew D.   +9 more
core   +1 more source

γ,δ-Unsaturated β-Diketones by Acylation of Ketones

open access: yes, 2016
γ,δ-Unsaturated β-diketones have been prepared by the acylation of ketones with N-acylbenzotriazoles of various aliphatic and aromatic α,β-unsaturated carboxylic ...
Sandeep K. Singh (1849165)   +2 more
core   +1 more source

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