摘要:
A process of selective oxidizing primary alcohols in carbohydrate by means of a hypohalite in the presence of catalytic amount of a di-tertiary-alkyl nitroxyl, the process is characterized in that the oxidation is under a two-phase and bromide-free condition in the presence of phase transfer catalyst.
摘要:
The present invention relates to a process of preparing dialkylcarbonates, and particularly to an improved process of preparing dialkylcarbonates, which comprises performing a reaction between an alcohol compound and a chloroformate derivative in the presence of an imidazole compound, thereby enabling to prepare dialkylcarbonates with high yield in a mild condition without using toxic raw materials and to easily separate impurities.
摘要:
The invention relates to a method for producing 2-halo-6-nitrobenzoic acids by the oxidation of 2-halo-6-nitrobenzyl alcohols and/or their esters and/or ethers with nitric acid at high temperatures. The invention also relates to a method for producing 2-halo-6-nitrobenzoic acids, starting from 2-halo-6-nitrotoluene and comprising the following stages: bromination, saponification and subsequent oxidation, whereby the oxidation is carried out according to the first method.
摘要:
A method for synthesizing and isolating an oxidation product is disclosed wherein nitric acid is reacted with an oxidizable reactant and the desired oxidized product is extracted using an organic solvent such as a dialkyl ether. The method permits the direct crystallization of aldaric acids such as glucaric acid and mannaric acid and eliminates the necessity of employing complicated, time consuming and wasteful neutralization/acidification steps.
摘要:
Processes for preparing aromatic carboxylic acids. Cinnamaldehyde is hydrogenated to produce a mixture of hydrogenation products, namely hydrocinnamaldehyde and hydrocinnamic alcohol. The mixture is then oxidized using a suitable oxidizing agent to substantially completely convert both hydrocinnamaldehyde and hydrocinnamic alcohol to hydrocinnamic acid.
摘要:
Disclosed are methods for polypropylene decomposition. Also disclosed are products obtained from the decomposition polypropylene including carboxylic acids, dicarboxylic acids, nitro-substituted carboxylic acids and dicarboxylic acids; as well as the salts, esters, and anhydrides thereof.
摘要:
The present invention relates to a method of synthesizing at least one organic acid comprising oxidizing glycolaldehyde with nitric acid in the presence of a solvent. Advantageously, it is an industrially applicable process, which prepares organic acid, notably glycolic acid and/or glyoxylic acid in a high yield based on bio-based feedstocks.
摘要:
Described are methods for preparing phenols, benzene carboxylic acids, esters and anhydrides thereof from furanic compounds by reaction with a dienophile, wherein the furanic compounds are reacted with a hydrazine and/or oxime and then reacted with a dienophile.
摘要:
A method for preparing fluorinated carboxylic acids and theirs salts is described comprising subjecting a fluorinated alcohol of the general formula (A): A-CH2-OH to at least one first and at least one second oxidizing agent to produce a highly fluorinated carboxylic acid or their salts of the general formula (B): A-COO M+, wherein M+ represents a cation and wherein A in formulas (A) and (B) is the same and A represents the residue: Rf-[0]p-CX"Y"-[0]m-CX'Y'-[0]n-CXY- wherein Rf represents a fluorinated alkyl residue which may or may not contain one or more catenary oxygen atoms, p, m and n are independently from each other either 1 or O, X, X', X", Y, Y' and Y" are independently from each other H, F, CF3, or C2F5 with the proviso that not all of X, X', X", Y, Y' and Y' ' are H; or A represents the residue: R-CFX- wherein X and R are independently selected from a hydrogen, a halogen, or an alkyl, alkenyl, cycloalkyl, or aryl residue, which may or may not contain one or more fluorine atoms and which may or may not contain one or more catenary oxygen atoms; wherein said at least one first oxidizing agent is a compound that can be converted, by action of the second oxidizing agent, into a reactive species capable of oxidizing the fluorinated alcohol.
摘要翻译:描述了制备氟化羧酸及其盐的方法,包括使通式(A)的氟化醇:A-CH 2 -OH经历至少一种第一和至少一种第二氧化剂以产生高度氟化的羧酸或 它们的通式(B)的盐:A-COO M +,其中M +表示阳离子,并且其中式(A)和(B)中的A相同且A表示残基:Rf- [O] p-CX“ 其中Rf表示可以含有或不含有一个或多个悬链氧原子的氟化烷基,p,m和n彼此独立地为 X',X',Y',Y'和Y“各自独立地为H,F,CF 3或C 2 F 5,条件是不是所有的X,X',X” Y'和Y“是H;或者A代表残基:R-CFX-,其中X和R独立地选自氢,卤素或烷基,烯基,环烷基或芳基残基,其可以或不可以 含有一个或多个氟原子 ms并且可能包含或不包含一个或多个悬链氧原子; 其中所述至少一种第一氧化剂是能够通过所述第二氧化剂的作用转化为能够氧化所述氟化醇的反应性物质的化合物。