Search results
Results From The WOW.Com Content Network
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 ...
Phenylboronic acid or benzeneboronic acid, abbreviated as PhB(OH) 2 where Ph is the phenyl group C 6 H 5 - and B(OH) 2 is a boronic acid containing a phenyl substituent and two hydroxyl groups attached to boron. Phenylboronic acid is a white powder and is commonly used in organic synthesis.
Beclometasone dipropionate, an example of a widely used corticosteroid ester. Note the propionate groups at the C17α and C21α positions (top right corner). This is a list of corticosteroid esters, including esters of steroidal glucocorticoids and mineralocorticoids. [1] [2] [3]
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.
The ethyl ether solvate is also commercially available, where the fluoroboric acid can be represented by the formula [H((CH 3 CH 2) 2 O) n] + [BF 4] −, where n is 2. It is mainly produced as a precursor to other fluoroborate salts. [3] It is a strong acid. Fluoroboric acid is corrosive and attacks the skin. It is available commercially as a ...
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]
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 .
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 .