Boronic Esters (also Named Boronate Esters)
Boronic esters are esters formed between a boronic acid and an alcohol.
Compound | General formula | General structure |
---|---|---|
Boronic acid | RB(OH)2 |
|
Boronic ester | RB(OR)2 |
|
Comparison between boronic acids and boronic esters |
The compounds can be obtained from borate esters by condensation with alcohols and diols. Phenylboronic acid can be selfcondensed to the cyclic trimer called triphenyl anhydride or triphenylboroxin.
Boronic ester | Diol | Structural formula | Molar mass | CAS number | Boiling point (°C) |
---|---|---|---|---|---|
Allylboronic acid pinacol ester | pinacol | 168.04 | 72824-04-5 | 50–53 (5 mmHg) | |
Phenyl boronic acid trimethylene glycol ester | trimethylene glycol | 161.99 | 4406-77-3 | 106 (2 mm Hg) | |
Diisopropoxymethylborane | isopropanol | 144.02 | 86595-27-9 | 105 -107 | |
Representative boronic esters |
Compounds with 5-membered cyclic structures containing the C-O-B-O-C linkage are called dioxaborolanes and those with 6-membered rings dioxaborinanes.
Read more about this topic: Boronic Acid
Famous quotes containing the word named:
“Methinks it would be some advantage to philosophy if men were named merely in the gross, as they are known. It would be necessary only to know the genus and perhaps the race or variety, to know the individual. We are not prepared to believe that every private soldier in a Roman army had a name of his own,because we have not supposed that he had a character of his own.”
—Henry David Thoreau (18171862)