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4-Formylphenyl boronic acid crystallizes in colorless needles [1] or is obtained as an odorless, whitish powder, which dissolves little in cold but better in hot water. The compound is quite stable [3] and readily forms dimers and cyclic trimeric anhydrides, which complicate purification and tend to protodeboronize, a secondary reaction that occurs frequently in the Suzuki coupling, with ...
Similarly it gives boronic acid esters, which can be useful in the cross coupling reactions. [3] [4] A condensation reaction of neopentyl glycol with 2,6-di-tert-butylphenol gives CGP-7930. Neopentyl glycol is a precursor to Neopentyl glycol diglycidyl ether. The sequence begins with alkylation with epichlorohydrin using a Lewis acid catalyst.
Salts and esters of carboxylic acids have similar names. For example, sodium acetate is a salt composed of sodium cations and acetate anions, but ethyl acetate is a covalently bonded ester. Wikimedia Commons has media related to Carboxylates .
4-Fluorophenibut (developmental code name CGP-11130; also known as β-(4-fluorophenyl)-γ-aminobutyric acid or β-(4-fluorophenyl)-GABA) is a GABA B receptor agonist which was never marketed. [1] It is selective for the GABA B receptor over the GABA A receptor ( IC 50 = 1.70 μM and > 100 μM, respectively). [ 1 ]
The mechanism of organotrifluoroborate-based Suzuki-Miyaura coupling reactions has recently been investigated in detail. The organotrifluoroborate hydrolyses to the corresponding boronic acid in situ, so a boronic acid can be used in place of an organotrifluoroborate, as long as it is added slowly and carefully. [7] [8]
Krapcho decarboxylation is a chemical reaction used to manipulate certain organic esters. [1] This reaction applies to esters with a beta electron-withdrawing group (EWG).. The reaction proceeds by nucleophilic dealkylation of the ester by the halide followed by decarboxylation, followed by hydrolysis of the resulting stabilized carbanion.
Roussin's red salt is the inorganic compound with the formula K 2 [Fe 2 S 2 (NO) 4]. This metal nitrosyl was first described by Zacharie Roussin in 1858, making it one of the first synthetic iron-sulfur clusters .
Basic heteroaromatic boronic acids (boronic acids that contain a basic nitrogen atom, such as 2-pyridine boronic acid) display additional protodeboronation mechanisms. [4] A key finding shows the speciation of basic heteroaromatic boronic acids to be analogous to that of simple amino acids , with zwitterionic species forming under neutral pH ...