ChemInform Abstract: Microwave-Assisted Fluorination: An Improved Method for Side Chain Fluorination of Substituted 1-Arylethanones.

ChemInform ◽  
2010 ◽  
Vol 41 (10) ◽  
Author(s):  
Thor Haakon Krane Thvedt ◽  
Erik Fuglseth ◽  
Eirik Sundby ◽  
Baard Helge Hoff
Keyword(s):  
Side Chain ◽  
Improved Method ◽  
Microwave Assisted ◽  
Substituted 1

Microwave assisted fluorination: an improved method for side chain fluorination of substituted 1-arylethanones

Tetrahedron ◽  
2009 ◽  
Vol 65 (46) ◽  
pp. 9550-9556 ◽  
Author(s):  
Thor Håkon Krane Thvedt ◽  
Erik Fuglseth ◽  
Eirik Sundby ◽  
Bård Helge Hoff
Keyword(s):  
Side Chain ◽  
Improved Method ◽  
Microwave Assisted ◽  
Substituted 1

scholarly journals The specificity of a 7 α-hydroxy steroid dehydrogenase from Escherichia coli

1976 ◽  
Vol 157 (1) ◽  
pp. 207-210 ◽  
Author(s):  
E S Haslewood ◽  
G A D Haslewood
Keyword(s):  
Escherichia Coli ◽  
Crude Enzyme ◽  
Hydroxyl Group ◽  
Side Chain ◽  
Improved Method ◽  
Hydroxy Steroid ◽  
Steroid Dehydrogenase

1. Thirty-eight steroids were tested as substrates for a 7 alpha-hydroxy steroid dehydrogenase preparation from a strain of Escherichia coli; an improved method of making the crude enzyme is described. 2. Steroids having a 7 alpha-hydroxyl group in the molecule were substrates except (a) when the 5 beta-cholan-24-oic acid side chain was shortened to less than four carbon atoms and (b) in certain cases when sulphate ester groups were present in the molecule. 3. For testing with the enzyme, a new specimen of 7 alpha-hydroxy-3,12-dioxo-5 beta-cholan-24-oic acid was made, which had properties different from those previously described.

An improved method for separating the kinetics of anisotropic and topographic gratings in side-chain azobenzene polyesters

2000 ◽  
Vol 70 (6) ◽  
pp. 803-807 ◽  
Author(s):  
M. Helgert ◽  
B. Fleck ◽  
L. Wenke ◽  
S. Hvilsted ◽  
P.S. Ramanujam
Keyword(s):  
Side Chain ◽  
Improved Method ◽  
Kinetics Of

Substituent effects in fluoromethylnaphthalenes by 19F nuclear magnetic resonance

1981 ◽  
Vol 59 (17) ◽  
pp. 2642-2649 ◽  
Author(s):  
Elisabeth A. Dixon ◽  
Alfred Fischer ◽  
Frank P. Robinson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Aromatic Ring ◽  
Chemical Shifts ◽  
Substituent Effects ◽  
Resonance Interaction ◽  
Parameter Analysis ◽  
Side Chain ◽  
Temperature Dependent ◽  
Substituted 1 ◽  
Electron Withdrawing Substituents

19F substituent chemical shifts (SCS) are reported for a series of twenty-one 3- and 4-substituted 1-fluoromethylnaphthalenes. The fluoromethylnaphthalenes exhibit an inverse SCS dependence: electron-withdrawing substituents produce upfield shifts. The results correlate well with SCS values previously reported for substituted benzyl fluorides. Hammett correlations are poor with conjugatively electron-withdrawing substituents exhibiting weaker than expected effects in the 3-position and stronger than expected effects in the 4-position. Dual substituent parameter analysis confirms the enhanced substituent–aromatic ring resonance interaction when the substituent is in the 4-position (ρR/ρI = 2). There is no evidence for enhanced resonance interaction between fluoromethyl side-chain and aromatic ring. The 19F chemical shift of 1-fluoromethylnaphthalene is markedly temperature dependent.

Microwave Assisted Prospective Synthesis of New 5-Arylidene Rhodanine Derivatives Bearing a 3-[4-(3-Aminopropyl)piperazin-1-yl]propyl Side Chain

2016 ◽  
Vol 3 (2) ◽  
pp. 145-156 ◽  
Author(s):  
Christelle N'ta Ambeu ◽  
Camille Dago ◽  
Wacothon Coulibaly ◽  
Yves-Alain Békro ◽  
Janat Mamyrbékova-Békro ◽  
...  
Keyword(s):  
Side Chain ◽  
Microwave Assisted

Microwave-Assisted Oxidation of Side Chain Arenes by MagtrieveTM

2003 ◽  
Vol 345 (12) ◽  
pp. 1269-1272 ◽  
Author(s):  
Marcin Lukasiewicz ◽  
Dariusz Bogdal ◽  
Jan Pielichowski
Keyword(s):  
Side Chain ◽  
Microwave Assisted
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