34006-70-7Relevant articles and documents
Preparation method 1 and 2 - cyclohexanedione
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Paragraph 0048-0051; 0055-0058; 0060-0063; 0065-0068; 0075, (2021/11/10)
The invention belongs to the technical field of chemical synthesis and particularly relates to a preparation method of 1-2 - cyclohexanedione. The invention provides 1-2 - Cyclohexanedione preparation method which comprises the following steps: cyclohexanone. The bromo reagent, the basic catalyst and the polar organic solvent are mixed for bromination reaction to obtain 2, 6 - dibromocyclohexanone. The mixture of 2, 6 - dibromocyclohexanone, inorganic base and polar solvent is subjected to hydrolysis reaction to obtain the 1, 2 -cyclohexanedione. To the preparation method, cyclohexanone and bromination reagent are taken as raw materials, 1 and 2 - cyclohexanedione with high yield and high purity can be prepared by sequentially conducting bromination reaction and hydrolysis reaction, and the preparation method provided by the invention is simple and easy to obtain and suitable for industrial production.
Reactivity of aminophosphonic acids. Oxidative dephosphonylation of 1-aminoalkylphosphonic acids by aqueous halogens
Drabowicz, Józef,Jordan, Frank,Kudzin, Marcin H.,Kudzin, Zbigniew H.,Stevens, Christian V.,Urbaniak, Pawe?
, p. 2308 - 2317 (2016/02/09)
The reactions of 1-aminoalkylphosphonic acids with bromine-water, chlorine-water and iodine-water were investigated. The formation of phosphoric(v) acid, as a result of a halogen-promoted cleavage of the Cα-P bond, accompanied by nitrogen release, was observed. The dephosphonylation of 1-aminoalkylphosphonic acids was found to occur quantitatively. In the reactions of 1-aminoalkylphosphonic acids with other halogen-water reagents investigated by 31P NMR, scission of the Cα-P bond was also observed, the reaction rates being comparable for bromine and chlorine, but much slower for iodine.
Photochemical α-bromination of ketones using N-bromosuccinimide: a simple, mild and efficient method
Arbuj, Sudhir S.,Waghmode, Suresh B.,Ramaswamy
, p. 1411 - 1415 (2007/10/03)
Aromatic and aliphatic carbonyl compounds undergo facile bromination with N-bromosuccinimide under UV-vis irradiation to give the corresponding α-brominated ketones in good yields, at low temperatures (30 °C), without any catalyst, catalyst support or radical initiator and within a short time.