Search results
Results from the WOW.Com Content Network
The reaction of the surface with a solution of diazonium salt in acetonitrile for 2 hours in the dark is a spontaneous process through a free radical mechanism: [42] Diazonium salt application silicon wafer. So far grafting of diazonium salts on metals has been accomplished on iron, cobalt, nickel, platinum, palladium, zinc, copper and gold ...
Azo printing exploits this reaction as well. In this case, the diazonium ion is degraded by light, leaving a latent image in undegraded diazonium salt which is made to react with a phenol, producing a colored image: the blueprint. [3] Prontosil, the first sulfa drug, was once produced by azo coupling. The azo compound is a prodrug that is ...
More recently, trifluoromethylation of diazonium salts has been developed and is referred to as a 'Sandmeyer-type' reaction. Diazonium salts also react with boronates, iodide, thiols, water, hypophosphorous acid and others, [6] and fluorination can be carried out using tetrafluoroborate anions (Balz–Schiemann reaction). However, since these ...
The Gomberg–Bachmann reaction, named for the Russian-American chemist Moses Gomberg and the American chemist Werner Emmanuel Bachmann, is an aryl-aryl coupling reaction via a diazonium salt. [1] [2] [3] The arene compound (here benzene) is reacted with a diazonium salt in the presence of a base to provide the biaryl through an intermediate ...
The unusual alkyl nitrite starting material of the Barton reaction is prepared by attack of an alcohol on a nitrosylium cation generated in situ by dehydration of doubly protonated nitrous acid. [6] This series of steps is mechanistically identical to the first half of the mechanism formation of the more well-known aryl and alkyl diazonium salts.
Formation of a secondary alcohol via alkene reduction and hydration is shown: The hydroboration-oxidation and oxymercuration-reduction of alkenes are more reliable in organic synthesis. Alkenes react with N-bromosuccinimide and water in halohydrin formation reaction. Amines can be converted to diazonium salts, which are then hydrolyzed.
The Meerwein arylation is an organic reaction involving the addition of an aryl diazonium salt (ArN 2 X) to an electron-poor alkene usually supported by a metal salt. [1] The reaction product is an alkylated arene compound. The reaction is named after Hans Meerwein, one of its inventors who first published it in 1939. Meerwein arylation
Aliphatic alcohols give azides via a variant of the Mitsunobu reaction, with the use of hydrazoic acid. [1] Hydrazines may also form azides by reaction with sodium nitrite: [16] Alcohols can be converted into azides in one step using 2-azido-1,3-dimethylimidazolinium hexafluorophosphate (ADMP) [17] or under Mitsunobu conditions [18] with diphenylphosphoryl azide (DPPA).