Efficient Method for the Preparation of Carboxylic Acid Alkyl Esters or Alkyl Phenyl Ethers by a New-Type of Oxidation–Reduction Condensation Using 2,6-Dimethyl-1,4-benzoquinone and Alkoxydiphenylphosphines

2003 ◽  
Vol 76 (8) ◽  
pp. 1645-1667 ◽  
Author(s):  
Taichi Shintou ◽  
Wataru Kikuchi ◽  
Teruaki Mukaiyama
Keyword(s):  
Carboxylic Acid ◽  
Efficient Method ◽  
Alkyl Esters ◽  
Oxidation Reduction ◽  
New Type ◽  
Phenyl Ethers

Reaction of Reformatsky Reagents with Substituted Alkyl Esters of 2-Oxochromene-3-carboxylic Acid

2004 ◽  
Vol 74 (7) ◽  
pp. 1105-1107 ◽  
Author(s):  
V. V. Shchepin ◽  
D. V. Fotin ◽  
V. V. Fotin ◽  
M. I. Vakhrin ◽  
S. N. Shurov
Keyword(s):  
Carboxylic Acid ◽  
Alkyl Esters

Reactions of Zinc Enolates of Substituted 1-Aryl-2,2-dibromobutanones with Alkyl Esters of 3-Oxo-3H-benzo[f]chromene-2-carboxylic Acid

2004 ◽  
Vol 74 (6) ◽  
pp. 937-938
Author(s):  
V. V. Shchepin ◽  
N. Yu. Russkikh ◽  
M. M. Kalyuzhnyi ◽  
R. V. Shchepin ◽  
M. I. Vakhrin
Keyword(s):  
Carboxylic Acid ◽  
Alkyl Esters ◽  
Zinc Enolates ◽  
Substituted 1

THE APPLICATION OF THE ARNDT–EISTERT REACTION TO THE SYNTHESIS OF FATTY ACIDS OF HIGH MOLECULAR WEIGHT

1950 ◽  
Vol 28b (9) ◽  
pp. 556-560 ◽  
Author(s):  
F. A. Vandenheuvel ◽  
P. Yates
Keyword(s):  
Fatty Acids ◽  
Molecular Weight ◽  
Carboxylic Acid ◽  
Stearic Acid ◽  
High Molecular Weight ◽  
Efficient Method ◽  
Convenient Method ◽  
Ultraviolet Absorption ◽  
Aliphatic Carboxylic Acid ◽  
Eicosanoic Acid

The Arndt–Eistert reaction offers a convenient method for the synthesis of the higher members of the aliphatic carboxylic acid series. Nonadecanoic acid, eicosanoic acid, and heneicosanoic acid have been prepared successively from stearic acid in good yields. An efficient method of purification of the synthetic products is described. The ultraviolet absorption maxima for some diazoketones derived from the higher members of the aliphatic carboxylic acid series are recorded.

Synthesis of C-aryl-N-(2-hydroxyphenylmethyl)-nitrones and their reaction with diphenylborinic or carboxylic acid derivatives. Crystal and molecular structures of a free nitrone ligand and its diphenyl–boron chelate

1997 ◽  
Vol 75 (12) ◽  
pp. 1830-1843 ◽  
Author(s):  
Wolfgang Kliegel ◽  
Jörg Metge ◽  
Steven J. Rettig ◽  
James Trotter
Keyword(s):  
Carboxylic Acid ◽  
Electron Distribution ◽  
Direct Methods ◽  
Molecular Structures ◽  
State Structure ◽  
Space Group ◽  
Crystal And Molecular Structures ◽  
New Type ◽  
Boron Chelate ◽  
Diphenylboron Chelate

The syntheses of a number of aromatic aldonitrones of N-(2-hydroxyphenylmethyl)hydroxylamine and their subsequent reactions with diphenylborinic or carboxylic acid derivatives are reported. Crystals of 8-(4-dimethylaminophenylmethylene)-6,6-diphenyl-5,7-dioxa-8-azonia-6-borata-5H-6,7,8,9-tetrahydrobenzocycloheptene, 2b, are triclinic, a = 10.6802(8), b = 11.1809(4), c =10.1520(3) Å, α = 105.847(3)°, β = 92.567(4)°, γ = 84.610(5)°, Z = 2, space group PĪ, and those of C-(4-dimethylaminophenyl)-N-(2-hydroxyphenylmethyl)nitrone, 6e, are monoclinic, a = 12.2319(8), b = 7.071(1), c = 17.2005(9) Å, β = 107.520(4)°, Z = 4, space group P21/a. The structures were solved by direct methods and refined by full-matrix least-squares procedures to R = 0.035 and 0.032 (Rw = 0.036 and 0.032) for 3379 and 1800 reflections with I ≥ 3σ(I), respectively. Compound 2b is representative of a new type of heterocyclic B,N-betaine. The solid state structure of 6e (the precursor to 2b) shows that only small topological changes, but significant changes in the electron distribution, occur upon the formation of the diphenylboron chelate. Keywords: aromatic aldonitrones, organoboron compounds, crystal structures.

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