1123-28-0Relevant articles and documents
Degradation of a model naphthenic acid, cyclohexanoic acid, by vacuum UV (172 nm) and UV (254 nm)/H2O2
Drzewicz, Przemyslaw,Afzal, Atefeh,El-Din, Mohamed Gamal,Martin, Jonathan W.
, p. 12067 - 12074 (2010)
The mechanism of hydroxyl radical initiated degradation of a typical oil sands process water (OSPW) alicyclic carboxylic acid was studied using cyclohexanoic acid (CHA) as a model compound. By use of vacuum ultraviolet irradiation (VUV, 172 nm) and ultraviolet irradiation in the presence of hydrogen peroxide UV(254 nm)/H2O2, it was established that CHA undergoes degradation through a peroxyl radical. In both processes the decay of the peroxyl radical leads predominantly to the formation of 4-oxo-CHA, and minor amounts of hydroxy-CHA (detected only in UV/H2O 2). In UV/H2O2, additional 4-oxo-CHA may also have been formed by direct reaction of the oxyl radical with H-O 2. The oxyl radical can be formed during decay of the peroxyl-CHA radical or reaction of hydroxy-CHA with hydroxyl radical. Oxo- and hydroxy-CHA further degraded to various dihydroxy-CHAs. Scission of the cyclohexane ring was also observed, on the basis of the observation of acyclic byproducts including heptadioic acid and various short-chain carboxylic acids. Overall, the hydroxyl radical induced degradation of CHA proceeded through several steps, involving more than one hydroxyl radical reaction, thus efficiency of the UV/H 2O2 reaction will depend on the rate of generation of hydroxyl radical throughout the process. In real applications to OSPW, concentrations of H2O2 will need to be carefully optimized and the environmental fate and effects of the various degradation products of naphthenic acids considered.
New process for synthesizing 1-hydroxycyclohexanecarboxylic acid and application
-
Paragraph 0030; 0031; 0033; 0034; 0035; 0036-0037; 0039-0040, (2019/01/14)
The invention discloses a new process for synthesizing 1-hydroxycyclohexanecarboxylic acid and an application. During the synthesis of the 1-hydroxycyclohexanecarboxylic acid, an anhydrous system is adopted. According to the process, due to an anhydrous r
ANESTHETIC COMPOUNDS AND RELATED METHODS OF USE
-
Paragraph 00201, (2013/07/25)
Provided herein are compounds according to formula (I): Provided herein is also a pharmaceutical composition comprising a compound according to formula (I) and a pharmaceutically acceptable carrier, and a method for providing anesthesia in a subject by administering such a pharmaceutical composition.
A practical and inexpensive 'convertible' isonitrile for use in multicomponent reactions
Le, Hoang V.,Fan, Lijun,Ganem, Bruce
supporting information; experimental part, p. 2209 - 2211 (2011/05/09)
N-tert-Butylamides are readily converted into the corresponding carboxylic acids by simple nitrosation. The process, which occurs under mild nonaqueous conditions, leaves carboxylic esters untouched and transforms multicomponent reaction products into useful building blocks for further synthetic elaboration.
