Some oxidation reactions of branched-chain carboxylic acids

1965 ◽  
Vol 18 (7) ◽  
pp. 1023 ◽  
Author(s):  
ALJ Beckwith ◽  
JE Goodrich
Keyword(s):  
Carboxylic Acids ◽  
Potassium Permanganate ◽  
Dilute Acid ◽  
Oxidation Reactions ◽  
Hydroxy Acids ◽  
Branched Chain ◽  
General Method

Various branched-chain carboxylic acids have been oxidized with the following reagents: (A) potassium manganate in dilute alkali; (B) potassium permanganate in concentrated alkali; (C) potassium peroxydisulphate in dilute alkali; (D) potassium peroxydisulphate in dilute acid. In most cases hydroxy-acids were formed by oxidation at the tertiary position but the yields were poor. None of these reagents appears to provide a general method for the preparation of lactones from branched-chain saturated carboxylic acids.

The reaction of carboxylic acids with epoxides using lithium naphthalenide

1974 ◽  
Vol 27 (10) ◽  
pp. 2205 ◽  
Author(s):  
T Fujita ◽  
S Watanabe ◽  
K Suga
Keyword(s):  
Carboxylic Acids ◽  
Good Yield ◽  
Hydroxy Acids

Lithium naphthalenide reacts with carboxylic acids in the presence of diethylamine to give the α-anions of lithium carboxylates. Reaction of these anions with various epoxides gives the corresponding y-hydroxy acids in good yield. The γ-hydroxy acids easily cyclize to give γ-butyrolactones.

Separation of furans and carboxylic acids from sugars in dilute acid rice straw hydrolyzates by nanofiltration

2010 ◽  
Vol 101 (13) ◽  
pp. 4889-4894 ◽  
Author(s):  
Yu-Hsiang Weng ◽  
Hwa-Jou Wei ◽  
Tsung-Yen Tsai ◽  
Ting-Hsiang Lin ◽  
Tsong-Yang Wei ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Rice Straw ◽  
Dilute Acid

scholarly journals Anodic Oxidation of Dithiane Carboxylic Acids: A Rapid, Mild and Practical Way to Access Functionalised Orthoesters

2020 ◽  
Author(s):  
Anthony Garcia ◽  
Matthew Leech ◽  
Alessia Petti ◽  
Camille Denis ◽  
Iain C. A. Goodall ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Anodic Oxidation ◽  
Green Conditions ◽  
General Method

A new electrochemical methodology has been developed for the preparation of a wide variety of functionalised orthoesters under mild and green conditions from easily accessible dithiane derivatives. The new methodology also offers an unprecedented way to access tri(fluorinated) orthoesters, a class of compound that has never been studied before. This provides the community with a rapid and general method to prepare libraries of functionalised orthoesters from simple and readily available starting materials.

scholarly journals The Messy Alkaline Formose Reaction and Its Link to Metabolism

Life ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 125
Author(s):  
Arthur Omran ◽  
Cesar Menor-Salvan ◽  
Greg Springsteen ◽  
Matthew Pasek
Keyword(s):  
Carboxylic Acids ◽  
Food Source ◽  
Chemical Species ◽  
Origins Of Life ◽  
Hydroxy Acids ◽  
Genetic Elements ◽  
Formose Reaction ◽  
Alkaline Conditions

Sugars are essential for the formation of genetic elements such as RNA and as an energy/food source. Thus, the formose reaction, which autocatalytically generates a multitude of sugars from formaldehyde, has been viewed as a potentially important prebiotic source of biomolecules at the origins of life. When analyzing our formose solutions we find that many of the chemical species are simple carboxylic acids, including α-hydroxy acids, associated with metabolism. In this work we posit that the study of the formose reaction, under alkaline conditions and moderate hydrothermal temperatures, should not be solely focused on sugars for genetic materials, but should focus on the origins of metabolism (via metabolic molecules) as well.

Chiroptical sensing of unprotected amino acids, hydroxy acids, amino alcohols, amines and carboxylic acids with metal salts

2019 ◽  
Vol 55 (44) ◽  
pp. 6297-6300 ◽  
Author(s):  
Ciarán C. Lynch ◽  
Zeus A. De los Santos ◽  
Christian Wolf
Keyword(s):  
Amino Acids ◽  
Carboxylic Acids ◽  
Amino Alcohols ◽  
Metal Salts ◽  
Hydroxy Acids ◽  
Optical Chirality ◽  
Iron Palladium

Optical chirality sensing of unprotected amino acids, hydroxy acids, amino alcohols, amines and carboxylic acids based on a practical mix-and-measure protocol with readily available copper, iron, palladium, manganese, cerium or rhodium salts is demonstrated.

A General Method for Photocatalytic Decarboxylative Hydroxylation of Carboxylic Acids

2020 ◽  
Vol 85 (7) ◽  
pp. 5019-5026 ◽  
Author(s):  
Shah Nawaz Khan ◽  
Muhammad Kashif Zaman ◽  
Ruining Li ◽  
Zhankui Sun
Keyword(s):  
Carboxylic Acids ◽  
General Method

Table salt as a catalyst for the oxidation of aromatic alcohols and amines to acids and imines in aqueous medium: effectively carrying out oxidation reactions in sea water

2019 ◽  
Vol 21 (8) ◽  
pp. 1929-1934 ◽  
Author(s):  
Susanta Hazra ◽  
Ajay Kishor Kushawaha ◽  
Deepak Yadav ◽  
Pritam Dolui ◽  
Mayukh Deb ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Carboxylic Acids ◽  
Sea Water ◽  
Oxidation Reactions ◽  
Table Salt ◽  
Economical Method ◽  
Oxidation Of Alcohols ◽  
Aromatic Alcohols

A simple, efficient, sustainable and economical method for the oxidation of alcohols and amines has been developed using chloride, a sea abundant anionic catalyst for the synthesis of a range of carboxylic acids, ketones and imines.

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